Amendment Flag Current Fiscal Year End Date Document Period End Date Entities [Table] Entity Information [Line Items] Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Filer Category Entity Public Float Entity Registrant Name Entity Central Index Key Entity Common Stock, Shares Outstanding Document Fiscal Year Focus Document Fiscal Period Focus Document Type Asia [Member] BASIS OF PRESENTATION AND ACCOUNTING POLICIES [Abstract] Accounts payable Accounts receivable, net of allowance for doubtful accounts of $1,953 in 2015 and $1,989 in 2014 Accounts Receivable, Net, Current ACCRUED EXPENSES Accounts Payable and Accrued Liabilities Disclosure [Text Block] Accrued expenses [Abstract] Accrued Liabilities, Current [Abstract] Sales commissions Accrued expenses Accrued expenses Accrued Liabilities, Current ACCRUED EXPENSES [Abstract] Accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Foreign Currency Translation Adjustment [Member] Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Unrealized Holding Gains on Available-for-Sale Securities [Member] Accumulated Net Investment Gain (Loss) Attributable to Parent [Member] Accumulated other comprehensive loss [Abstract] Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] Foreign currency translation adjustment, net of taxes of ($336) at June 30, 2015 and ($142) at December 31, 2014 Accumulated Other Comprehensive Income (Loss) [Table] Unrealized holding gains on available-for-sale securities, net of taxes of $274 at June 30, 2015 and $259 at December 31, 2014 Unfunded SERP liability, net of taxes of ($1,269) at June 30, 2015 and ($1,325) at December 31, 2014 Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated other comprehensive loss Balance at beginning of period Balance at end of period Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Additional paid-in capital Adjustments to reconcile net earnings to net cash provided by operating activities: Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Accounts receivable, allowance for doubtful accounts Amortization of deferred financing costs Construction in Progress [Member] Asset under Construction [Member] ASSETS Assets [Abstract] Total assets Assets Total current assets Assets, Current Current Assets: Current Assets Combined fair value of available-for-sale securities Available-for-sale Securities Gross unrealized gains Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax BASIS OF PRESENTATION AND ACCOUNTING POLICIES Basis of Presentation and Significant Accounting Policies [Text Block] Buildings and Improvements [Member] Acquisition of issued and outstanding capital stock (in hundredths) Fair value of consideration transferred Business Combination, Consideration Transferred Accounts payable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable Assets acquired [Abstract] Noncurrent liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other Other current liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other Other current assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets Unaudited Pro forma Consolidated Results of Operations [Abstract] Accounts receivable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables Cash Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents Revenue Business Acquisition, Acquiree [Domain] Unaudited pro forma consolidated results of operations information Assumption of liability Business Combination, Consideration Transferred, Liabilities Incurred Liabilities assumed [Abstract] Net loss Business Acquisition, Pro Forma Net Income (Loss) Intangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill Acquisition date Business Acquisition [Axis] Business Acquisition [Axis] Other assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets Total liabilities assumed Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities ACQUISITIONS AND DISPOSITION [Abstract] Total identifiable assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Business Acquisition [Line Items] Consideration transferred [Abstract] Business Combination, Consideration Transferred [Abstract] ACQUISITIONS AND DISPOSITION Business Combination Disclosure [Text Block] Deductible for tax purposes from goodwill Acquisition-related costs Inventories Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory Net identifiable assets acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Property, plant and equipment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Fair values of the consideration transferred and identifiable net assets acquired [Abstract] Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Less Noncontrolling Interest [Abstract] Net assets acquired Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Cash and cash equivalents - beginning of period Cash and cash equivalents - end of period Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Net (decrease) increase in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Class of Stock [Domain] Commitments and contingencies COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] COMMITMENTS AND CONTINGENCIES [Abstract] Common Stock Common share (in dollars per share) Common stock, authorized (in shares) Common stock, par value (in dollars per share) Class A [Member] Common Class A [Member] Class A Common Stock [Member] Common stock, outstanding (in shares) Class B [Member] Common Class B [Member] Class B Common Stock [Member] RETIREMENT FUND AND PROFIT SHARING PLAN [Abstract] Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent ACCUMULATED OTHER COMPREHENSIVE LOSS Consolidation Items [Domain] Consolidation Items [Axis] Cost of sales Credit Facility [Domain] Credit Facility [Axis] DEBT [Abstract] DEBT Debt Disclosure [Text Block] Aggregate amount of line of credit Deferred income taxes Deferred revenue Deferred tax liability, net Deferred Tax Assets, Net Deferred income taxes Deferred Tax Assets, Net of Valuation Allowance, Noncurrent Deferred tax assets Deferred tax liability Deferred Tax Liabilities, Net Deferred income taxes Deferred Tax Liabilities, Net, Noncurrent Defined Contribution Plan Name [Axis] Defined Contribution Plan [Table] Defined Contribution Plan Disclosure [Line Items] Defined Contribution Plan Name [Domain] Net amortization Defined Benefit Plan, Other Costs Balance sheet amounts [Abstract] Total amounts recognized in accumulated other comprehensive loss Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax Defined Benefit Plan Disclosure [Line Items] Amounts recognized in accumulated other comprehensive loss, pretax [Abstract] Net loss Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Gains (Losses), before Tax Maximum annual contribution by eligible employee (in hundredths) Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent Interest cost Net periodic benefit cost Defined Benefit Plan, Net Periodic Benefit Cost Components of SERP expense [Abstract] Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] Compensation expense Defined Benefit Plans and Other Postretirement Benefit Plans [Axis] Service cost Defined Benefit Plan and Other Postretirement Benefit Plan [Domain] Defined Benefit Plan and Other Postretirement Benefit Plan [Domain] Prior service cost Depreciation and amortization Depreciation expense Disposal Group Name [Domain] Disposal of assets, net sales Disposal Group, Including Discontinued Operation, Revenue Less Dividends declared: Dividends, Common Stock, Cash Europe [Member] Net earnings per share [Abstract] Earnings Per Share, Basic and Diluted [Abstract] Common share - basic and diluted (in dollars per share) Earnings Per Share, Basic and Diluted EARNINGS PER SHARE Earnings Per Share [Text Block] Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] EARNINGS PER SHARE [Abstract] Net earnings per common share: Effect of exchange rate changes on cash and cash equivalents Severance Costs [Member] Employee Severance [Member] Salaries, bonuses and related benefits Percentages of owned joint venture investment (in hundredths) Equity Method Investment, Ownership Percentage Equity Component [Domain] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] FAIR VALUE MEASUREMENTS [Abstract] FAIR VALUE MEASUREMENTS Fair Value Disclosures [Text Block] Foreign jurisdictions [Member] Net unrealized (gains) losses on foreign currency revaluation Foreign Currency Transaction Loss, before Tax Goodwill Goodwill Gross profit Gross Profit Intersegment Elimination [Member] Disposal Group Name [Axis] CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) [Abstract] INCOME TAXES [Abstract] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Income Tax Authority [Axis] Earnings before provision for income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest Disposal Groups, Including Discontinued Operations [Table] (Benefit) provision for income taxes Income Tax Authority [Domain] INCOME TAXES Income Tax Disclosure [Text Block] Cash paid during the period for income taxes, net of refunds Accounts receivable Increase (Decrease) in Accounts Receivable Accounts payable Increase (Decrease) in Accounts Payable Accrued expenses Increase (Decrease) in Accrued Liabilities Other operating assets/liabilities, net Increase (Decrease) in Other Operating Liabilities Changes in operating assets and liabilities: Inventories Increase (Decrease) in Inventories Intangible assets, net Intangible Assets, Net (Excluding Goodwill) Interest expense Interest Expense Interest expense incurred Cash paid during the period for interest Components of inventories [Abstract] Finished goods INVENTORIES Inventory Disclosure [Text Block] Inventories Inventories Inventory, Net Raw materials INVENTORIES [Abstract] Work in progress Available-for-sale securities measured at fair value Land [Member] Total current liabilities Liabilities, Current Current Liabilities: Total liabilities Liabilities Long-term Liabilities: LIABILITIES AND STOCKHOLDERS' EQUITY Total liabilities and stockholders' equity Liabilities and Equity Income taxes payable Liability for uncertain tax positions Liability for Uncertain Tax Positions, Noncurrent Line of Credit Facility [Table] Maturity date Line of Credit Facility [Abstract] Lender Name [Axis] Outstanding borrowings Long-term Line of Credit Available line of credit Line of Credit Facility, Lender [Domain] Interest rate on borrowings outstanding (in hundredths) Line of Credit Facility [Line Items] Line of credit, current borrowing capacity Litigation Case Type [Domain] Litigation Case [Axis] Fair value of long-term debt Carrying amount of long-term debt Current portion of long-term debt Long-term debt Long-term Debt, Excluding Current Maturities Damages awarded Loss Contingency, Damages Awarded, Value Estimated liability Loss Contingency, Estimate of Possible Loss Number of defendants Loss Contingency, Number of Defendants Loss Contingencies [Table] Loss Contingencies [Line Items] Machinery and Equipment [Member] Major Types of Debt and Equity Securities [Domain] Major Types of Debt and Equity Securities [Axis] Maximum [Member] Minimum [Member] Schedule of warranty accrual account for the period from the acquisition date [Roll Forward] North America [Member] Cash flows from financing activities: Cash flows from operating activities: Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities, Continuing Operations Net earnings available to common stockholders Net earnings available to common stockholders Net earnings available to common stockholders Net Income (Loss) Attributable to Parent Cash flows from investing activities: Net cash (used in) provided by financing activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Number of reportable operating segments Income (loss) from operations Income from operations Operating income (loss) Operating Income (Loss) Other Restructuring Costs [Member] Other Restructuring [Member] Net current period other comprehensive (loss) income Other Comprehensive Income (Loss), Net of Tax Other comprehensive (loss) income before reclassifications Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Currency translation adjustment, tax Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax Currency translation adjustment, net of taxes of ($34) in the three months ended June 30, 2015, $89 in the three months ended June 30, 2014, ($194) in the six months ended June 30, 2015 and $123 in the six months ended June 30, 2014 Other assets Other Assets, Noncurrent Other, net Other Noncash Income (Expense) Other current assets Other Assets, Current Change in unfunded SERP liability, tax Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Tax Change in unfunded SERP liability, net of taxes of $28 in the three months ended June 30, 2015, $14 in the three months ended June 30, 2014, $56 in the six months ended June 30, 2015 and $28 in the six months ended June 30, 2014. Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax Unrealized holding gain on marketable securities arising during the period, tax Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax Gross unrealized gains associated with the investment held in the rabbi trust, gross Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax Unrealized holding gains on marketable securities arising during the period, net of taxes of ($18) in the three months ended June 30, 2015, $48 in the three months ended June 30, 2014, $15 in the six months ended June 30, 2015 and $65 in the six months ended June 30, 2014 Other current liabilities Other liabilities Other Liabilities, Noncurrent Interest income and other, net Other comprehensive income (loss): Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent, Parenthetical Disclosures [Abstract] Other Other comprehensive income (loss): Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Purchase of company-owned life insurance (COLI) Payments for (Proceeds from) Life Insurance Policies Payment for acquisitions, net of cash acquired Payment for acquisition, net of cash acquired (see Note 2) Payments to Acquire Businesses, Net of Cash Acquired Dividends paid to common stockholders Payments of Dividends Cash Paid Payments to Acquire Businesses, Gross Purchases of property, plant and equipment Payments to Acquire Property, Plant, and Equipment Increase in cash equivalents within Rabbi Trust Payments to Acquire Marketable Securities Payment of deferred financing costs Payments of Debt Issuance Costs Minimum pension obligation and unfunded pension liability RETIREMENT FUND AND PROFIT SHARING PLAN Pension and Other Postretirement Benefits Disclosure [Text Block] Preferred stock, no par value, 1,000,000 shares authorized; none issued Preferred stock, issued (in shares) Preferred stock, authorized (in shares) Preferred stock, par value (in dollars per share) Reduction in notes payable Proceeds from long-term debt Borrowings under revolving credit line Proceeds from surrender of COLI Proceeds from sale of business Proceeds from disposal/sale of property, plant and equipment Proceeds from Sale of Property, Plant, and Equipment Product Warranty Liability [Table] Product Warranty Liability [Table] Warranty accrual Product Warranty Liability [Line Items] Product Warranty Liability [Line Items] Property, plant and equipment Property, Plant and Equipment [Table Text Block] Property, Plant and Equipment, Type [Axis] Property, plant and equipment [Abstract] Property, Plant and Equipment, Net [Abstract] PROPERTY, PLANT AND EQUIPMENT [Abstract] Property, Plant and Equipment, Type [Domain] Property, plant and equipment, net Property, plant and equipment, net Property, Plant and Equipment, Net Property, plant and equipment, gross Property, Plant and Equipment [Line Items] PROPERTY, PLANT AND EQUIPMENT Property, Plant and Equipment Disclosure [Text Block] Reportable Operating Segments [Member] Range [Domain] Range [Axis] Amount reclassified from accumulated other comprehensive loss Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Summary of key financial data [Abstract] RELATED PARTY TRANSACTIONS Related Party Transactions Disclosure [Text Block] Related Party [Axis] Related Party [Axis] Related Party [Domain] RELATED PARTY TRANSACTIONS [Abstract] Repayments of revolving credit line Repayments of Long-term Lines of Credit Repayments of long-term debt Repayments of Long-term Debt Measurement Period Adjustments [Member] Restatement Adjustment [Member] New Charges Restructuring charges Liability, Ending balance Liability, Beginning balance Restructuring Reserve RESTRUCTURING ACTIVITIES [Abstract] Activity and liability balances related to restructuring costs [Roll Forward] RESTRUCTURING ACTIVITIES Restructuring Type [Axis] Restructuring Cost and Reserve [Line Items] Retained earnings Net Sales to External Customers Revenues Revolving Credit Facility [Member] Net Sales Net sales Revenues As Reported [Member] Scenario, Previously Reported [Member] Scenario, Unspecified [Domain] Schedule of acquisition date fair values of assets acquired and liabilities assumed Schedule of warranty accrual account for the period from the acquisition date Schedule of Product Warranty Liability [Table Text Block] Accrued expenses Schedule of Accrued Liabilities [Table Text Block] Components of accumulated other comprehensive loss Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Earnings and weighted-average shares outstanding used in the computation of basic and diluted earnings per share Reconciliation amount of liability for uncertain tax positions Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block] Schedule of Business Acquisitions, by Acquisition [Table] Components of inventories Schedule of Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Table] Schedule of Defined Benefit Plans Disclosures [Table] Schedule of Property, Plant and Equipment [Table] Schedule of Restructuring and Related Costs [Table] Activity and liability balances related to restructuring cost Restructuring and Related Costs [Table Text Block] Schedule of Segment Reporting Information, by Segment [Table] Key financial data SEGMENTS [Abstract] Segment Reporting Information [Line Items] SEGMENTS Segment Reporting Disclosure [Text Block] Geographical [Domain] Selling, general and administrative expenses Stock-based compensation Less repair costs incurred Standard Product Warranty Accrual, Period Increase (Decrease) Less cash settlements Standard Product Warranty Accrual, Payments Ending balance as of end of period Beginning balance as of beginning of period Standard Product Warranty Accrual Currency translation Statement [Line Items] CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) [Abstract] CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME [Abstract] Equity Components [Axis] Equity Components [Axis] Statement [Table] Scenario [Axis] CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) [Abstract] Class of Stock [Axis] Geographical [Axis] SERP [Member] Stockholders' Equity: Stockholders' Equity: Total stockholders' equity Stockholders' Equity Attributable to Parent Unfunded SERP Liability [Member] SERP [Member] Supplemental Employee Retirement Plan [Member] Supplementary information: Interest and penalties uncertain tax positions recognized until various tax matters are resolved Common stock, treasury shares (in shares) Type of Restructuring [Domain] Total undistributed earnings Undistributed Earnings, Diluted Undistributed earnings Undistributed Earnings, Basic Interest and penalties uncertain tax positions recognized Unrecognized tax benefit Unrecognized Tax Benefits Accrued interest and penalties uncertain tax positions Liability for uncertain tax position that would impact effective tax rate Weighted-average shares outstanding [Abstract] Weighted-average number of shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Common share - basic and diluted (in shares) Common share - basic and diluted (in shares) Acquisition of net assets or equity interests of an entity wherein the acquiring entity obtains control over the acquired entity. Emerson [Member] Acquisition of net assets or equity interests of an entity wherein the acquiring entity obtains control over the acquired entity. Power Solutions [Member] Earning Per Share Two Class Method [Abstract] Earnings and weighted average shares outstanding [Abstract] Net earnings allocation basic and diluted [Abstract] Net earnings allocation - basic and diluted [Abstract] Undistributed earnings allocation basic and diluted [Abstract] Undistributed earnings allocation - basic and diluted [Abstract] Numerator [Abstract] Denominator [Abstract] Tabular disclosure of the sales and income or loss from operations for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. Schedule of Acquisitions Segment Sales and Income from Operations [Table Text Block] Components of segment sales, income from operations and total assets Acquisition of net assets or equity interests of an entity wherein the acquiring entity obtains control over the acquired entity. Power Solutions and Connectivity Solutions [Member] ACCUMULATED OTHER COMPREHENSIVE LOSS [Abstract] Accumulated Other Comprehensive Income Loss Tax Effect [Abstract] Accumulated other comprehensive loss, tax [Abstract] Tax portion in relation to net gain (loss), prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, included in accumulated other comprehensive income associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost. Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Tax Effect Unfunded SERP liability, tax Tax effect of accumulated appreciation or loss in value of foreign currency translation adjustment at the end of an accounting period. Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax Effect Foreign currency translation adjustment, tax Tax effect of accumulated appreciation or loss in value of total available-for-sale securities at the end of an accounting period. Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Tax Effect Unrealized holding gains on available-for-sale securities, tax Changes in Accumulated Other Comprehensive Loss by Component [Roll Forward] Number of industry in which entity operates with its reportable operating segments. Number of industry in which entity operates Acquisition of net assets or equity interests of an entity wherein the acquiring entity obtains control over the acquired entity. Emerson Network Power Connectivity Solutions [Member] Connectivity Solutions [Member] Represents the companies acquired in a business combination. Acquired Companies [Member] 2014 Acquisitions [Member] Tabular disclosure of changes in components of accumulated other comprehensive income (loss). Schedule of changes in accumulated other comprehensive loss by component [Table Text Block] Changes in accumulated other comprehensive loss by component The amount owed to the joint venture. Joint venture liability Joint venture liability Inventory purchased from the joint venture. Inventory purchase payment from joint venture Inventory purchase payment from joint venture Dividends Paid Per Share [Abstract] Dividends paid per common share: Refers to name of defendant. Molex Inc [Member] Refers to name of plaintiff. SynQor, Inc. [Member] SynQor, Inc [Member] Refers to damages covered through indemnification agreement. Damages Covered Through Indemnification Agreement Damages covered through indemnification agreement Number of patents infringed against the entity. Number of patents Number of patents Acquisition of net assets or equity interests of an entity wherein the acquiring entity obtains control over the acquired entity. Arezzo Revenue Agency [Member] Senior Credit and Security Agreement entered by the entity. New Secured Credit Agreement [Member] New Secured Credit Agreement [Member] Refers to term loan with a special feature that stipulates that the borrower can withdraw predefined amounts of the total pre-approved amount of a term loan at contractual times. Delayed Draw Term Loan [Member] Delayed Draw Term Loan [Member] Refers to monetary loan that is repaid in regular payments over a set period of time. Term Loan [Member] The defined contribution plan that is intended to meet the applicable requirements for tax-qualification under section 401(a) and (k) of the Internal Revenue Code of 1986. Bel Fuse Inc Employees Savings Plan [Member] Number of shares of the company's common stock owned by the plan. Shares Held in Plan Shares owned by plan (in shares) The percentage that the entity will match of the next 5% compensation contributed by participants into the 401(k) plan. Employer match of the next five percent compensation contributed by participants Employer match of the next 5% compensation contributed by participants (in hundredths) The Company's non-defined retirement fund covering substantially all of their Hong Kong-based full-time employees. Non Defined Retirement Fund [Member] The percentage that the entity's will match of the first 1% of compensation contributed by participants into the 401(k) plan. Employer match of the first one percent of compensation contributed by participants Employer match of the first 1% of compensation contributed by participants (in hundredths) Minimum percentage of employees' gross pay for which the employer contributes to a defined contribution plan. Defined Contribution Plan Minimum Employer Contribution Percent Minimum employer contribution to plan (in hundredths) Refers to percentage of compensation contributed by participant. Percentage Of Participant Contribution One Percentage of participant contribution under condition one (in hundredths) Refers to percentage of compensation contributed by participant. Percentage Of Participant Contribution Two Percentage of employee deferrals under condition two (in hundredths) Percentage of employees' gross pay for which the employer contributes to a defined contribution plan. Defined Contribution Plan Employer Contribution Percent Employer contribution of eligible salary (in hundredths) Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments and disclosure of the net gain (loss) and net prior service cost or credit recognized in accumulated other comprehensive income (loss) for the period for pension plans and/or other employee benefit plans. Schedule of Net Benefit Costs, Amount Recognized in Balance Sheet and Accumulated Other Comprehensive Income [Table Text Block] Components of SERP expense Represents standard warranty period in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Standard warranty period of product Warranty period of product Represents the aggregate increase in the charges and costs accrued of the standard product warranty. Standard Product Warranty Accrual Charges and Costs Accrued Charges and costs accrued Represents liability for a standard product warranty adjustments related to pre-existing warranties (including changes in estimates). Standard Product Warranty Accrual Adjustments Related to Pre-existing Warranties Including changes in Estimates Adjustments related to pre-existing warranties (including changes in estimates) Total of the carrying values as of the balance sheet date of obligations incurred through that date and payable for obligations related to subcontracting labor. Used to reflect current portion of the liabilities (due within one year or within the normal operating cycle if longer). Accrued subcontracting labor Subcontracting labor Document and Entity Information [Abstract] Schedule for income taxes. Disclosure includes but not limited to: (1) the policy on classification of interest and penalties; (2) a tabular reconciliation of the total amounts of unrecognized tax benefits at the beginning and end of the period; the total amount(s) of: (3) unrecognized tax benefits that, if recognized, would affect the effective tax rate, and (4) interest and penalties recognized in each of the income statement and balance sheet; (5) for positions for which it is reasonably possible that the total amounts unrecognized will significantly change within 12 months of the reporting date the: (i) nature of the uncertainty, (ii) nature of the event that could occur that would cause the change, and (iii) an estimate of the range of the reasonably possible change or a statement that an estimate of the range cannot be made; and (6) a description of tax years that remain subject to examination by major tax jurisdictions. Income Taxes [Table] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Income Taxes [Line Items] Additions in present value of liability during the year arising from acquisitions of entities. Additions relating to acquisitions Value of investment in a trust (for example, a 'rabbi trust') set up specifically to accumulate stock for the sole purpose of distribution to participating employees. Investments held in Rabbi Trust [Member] The amount of the transfers of assets or liabilities measured on a recurring basis between different levels of the fair value hierarchy. Transfers in out between levels Refers to the restructuring reserve settle with cash and with out cash previously accrued type of restructuring cost. Restructuring, Cash Payments and Other Settlements Cash Payment and Other Settlements Represents the aggregation and reporting of combined amounts of business combinations that were completed. Network Power Systems [Member] Network Power Systems [Member] The pro forma basic and diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period. Business Acquisition Pro Forma Earnings Per Share Basic and Diluted Loss per common share - basic and diluted (in dollars per share) Refers to number of months under a manufacturing services agreement. Number of manufacturing service agreement Number of months of manufacturing service agreement The proceeds from sale of business deposit in escrow during the period. Proceeds from sale of business in escrow The total cost of the acquired entity including the cash paid to shareholders of acquired entities, fair value of debt and equity securities issued to shareholders of acquired entities, the fair value of the liabilities assumed, and direct costs of the acquisition. Business Combination Cost Of Acquired Entity Purchase Price Total consideration paid Fair value, as of the acquisition date, of potential payments under the contingent consideration arrangement including cash and shares. Business Combination Contingent Consideration At Fair Value Deferred consideration Represents the companies acquired in a business combination. Acquired Companies 2014 [Member] 2014 Acquired Companies [Member] Amount of accrued expenses liabilities in an entity's business and related party payables, assumed at the acquisition date. Accrued expenses Accrued expenses