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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2014 Reporting_Unit | Dec. 31, 2013 | Dec. 31, 2012
Loss Contingencies [Line Items] |  |  |
Original maturity period of cash and cash equivalents | Three months or less |  |
Fair value of cash and cash equivalents based on quoted market prices in active markets Level 1 valuation | $ 1,200,000 us-gaap_CashAndCashEquivalentsFairValueDisclosure | $ 361,200,000 us-gaap_CashAndCashEquivalentsFairValueDisclosure |
Amount of inventory as a percentage of prior year purchases that can be returned by certain distributors | 3.00%bdc_AmountOfInventoryAsPercentageOfPriorYearPurchasesThatCanBeReturnedByCertainDistributors |  |
Unprocessed adjustments recognized against gross accounts receivables | 17,600,000 bdc_UnprocessedAdjustmentsRecognizedOnAccountsReceivable | 18,200,000 bdc_UnprocessedAdjustmentsRecognizedOnAccountsReceivable |
Bad debt expense, net of recoveries | 300,000 us-gaap_ProvisionForDoubtfulAccounts | 200,000 us-gaap_ProvisionForDoubtfulAccounts | 1,900,000 us-gaap_ProvisionForDoubtfulAccounts
Allowance for doubtful accounts | 11,500,000 us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent | 3,400,000 us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent |
Obsolescence and other reserves | 31,823,000 us-gaap_InventoryValuationReserves | 21,317,000 us-gaap_InventoryValuationReserves |
Goodwill qualitative assessment | 258,000,000 bdc_GoodwillQualitativeAssessment |  |
Number of Reporting Units | 6 us-gaap_NumberOfReportingUnits |  |
Percentage of projected benefit obligation | Lesser of 10% |  |
Accrued sales rebates | 31,500,000 bdc_AccruedSalesRebates | 34,300,000 bdc_AccruedSalesRebates |
Advertising costs | 21,800,000 us-gaap_AdvertisingExpense | 17,800,000 us-gaap_AdvertisingExpense | 16,300,000 us-gaap_AdvertisingExpense
Outstanding derivatives | 0 us-gaap_DerivativeFairValueOfDerivativeNet | 0 us-gaap_DerivativeFairValueOfDerivativeNet |
Customer Relationships [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Impairment charges |  |  | 6,800,000 us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember
Trademarks [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Impairment charges |  |  | $ 5,200,000 us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill / us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksMember
Minimum [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Estimated useful life of related assets | 1 year |  |
Minimum [Member] | Buildings [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Estimated useful life of related assets | 10 years |  |
Minimum [Member] | Machinery and Equipment [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Estimated useful life of related assets | 5 years |  |
Minimum [Member] | Computer Equipment and Software [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Estimated useful life of related assets | 5 years |  |
Maximum [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Estimated useful life of related assets | 25 years |  |
Maximum [Member] | Buildings [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Estimated useful life of related assets | 40 years |  |
Maximum [Member] | Machinery and Equipment [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Estimated useful life of related assets | 12 years |  |
Maximum [Member] | Computer Equipment and Software [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Estimated useful life of related assets | 10 years |  |

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- Definition Amount of inventory as a percentage of prior year purchases that can be returned by certain distributors in accordance with contractual agreements. + References No definition available. + Details
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