XML 66 R53.htm IDEA: XBRL DOCUMENT
v3.4.0.3

Summary of Significant Accounting Policies - Additional Information (Detail) | 12 Months Ended
--- | ---
Dec. 31, 2015 USD ($) Customer Reporting_Unit | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($)
Significant Accounting Policies [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 | $ 0 | $ 1,200,000 |
Amount of inventory as a percentage of prior year purchases that can be returned by certain distributors | 3.00% |  |
Unprocessed adjustments recognized against gross accounts receivables | $ 19,100,000 | 17,600,000 |
Bad debt expense, net of recoveries | (1,800,000) | 300,000 | $ 200,000
Accounts receivable recovered | $ 2,700,000 |  |
Number of customers with accounts receivable recovered | Customer | 1 |  |
Allowance for doubtful accounts | $ 8,300,000 | 11,500,000 |
Obsolescence and other reserves | 22,531,000 | 31,823,000 |
Goodwill qualitative assessment | 636,000,000 |  |
Impairment charges | $ 0 | 0 | 0
Percentage of projected benefit obligation | Lesser of 10% |  |
Accrued sales rebates | $ 30,000,000 | 31,500,000 |
Advertising costs | 27,500,000 | 21,800,000 | 17,800,000
Decrease in total current assets |  | 22,100,000 |
Increase in non-current deferred tax assets |  | 20,000,000 |
Increase (Decrease) in accrued liabilities | $ (59,214,000) | 5,598,000 | $ (31,690,000)
Increase in non-current deferred tax liabilities |  | 200,000 |
Qualitative Assessment [Member] |  |  |
Significant Accounting Policies [Line Items] |  |  |
Number of Reporting Units | Reporting_Unit | 6 |  |
Quantitative Assessment [Member] |  |  |
Significant Accounting Policies [Line Items] |  |  |
Number of Reporting Units | Reporting_Unit | 4 |  |
Current Asset [Member] |  |  |
Significant Accounting Policies [Line Items] |  |  |
Decrease in value of assets and liabilities due to adoption of ASU | $ 6,000,000 | 5,800,000 |
Long Term Debt Noncurrent [Member] |  |  |
Significant Accounting Policies [Line Items] |  |  |
Decrease in value of assets and liabilities due to adoption of ASU | 25,200,000 | 22,600,000 |
Other Noncurrent Assets [Member] |  |  |
Significant Accounting Policies [Line Items] |  |  |
Decrease in value of assets and liabilities due to adoption of ASU | $ 19,200,000 | 28,400,000 |
Minimum [Member] |  |  |
Significant Accounting Policies [Line Items] |  |  |
Estimated useful life of related assets | 1 year |  |
Minimum [Member] | Buildings [Member] |  |  |
Significant Accounting Policies [Line Items] |  |  |
Estimated useful life of related assets | 10 years |  |
Minimum [Member] | Machinery and Equipment [Member] |  |  |
Significant Accounting Policies [Line Items] |  |  |
Estimated useful life of related assets | 5 years |  |
Minimum [Member] | Computer Equipment and Software [Member] |  |  |
Significant Accounting Policies [Line Items] |  |  |
Estimated useful life of related assets | 5 years |  |
Maximum [Member] |  |  |
Significant Accounting Policies [Line Items] |  |  |
Estimated useful life of related assets | 25 years |  |
Maximum [Member] | Buildings [Member] |  |  |
Significant Accounting Policies [Line Items] |  |  |
Estimated useful life of related assets | 40 years |  |
Maximum [Member] | Machinery and Equipment [Member] |  |  |
Significant Accounting Policies [Line Items] |  |  |
Estimated useful life of related assets | 12 years |  |
Maximum [Member] | Computer Equipment and Software [Member] |  |  |
Significant Accounting Policies [Line Items] |  |  |
Estimated useful life of related assets | 10 years |  |
Hirschmann JV [Member] |  |  |
Significant Accounting Policies [Line Items] |  |  |
Ownership percentage | 50.00% |  |
Carrying value recorded in other long-lived assets | $ 29,500,000 | $ 33,400,000 |

X
- Definition Accrued sales rebates. + References No definition available. + Details
Name: | bdc_AccruedSalesRebates
Namespace Prefix: | bdc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- 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
Name: | bdc_AmountOfInventoryAsPercentageOfPriorYearPurchasesThatCanBeReturnedByCertainDistributors
Namespace Prefix: | bdc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Cash equivalent maturity period maximum. + References No definition available. + Details
Name: | bdc_CashEquivalentMaturityPeriodMaximum
Namespace Prefix: | bdc_
Data Type: | us-types:durationStringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Decrease in current assets for balance sheet classification of deferred taxes. + References No definition available. + Details
Name: | bdc_DecreaseInCurrentAssetsForBalanceSheetClassificationOfDeferredTaxes
Namespace Prefix: | bdc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of goodwill tested for impairment using the Qualitative Assessment approach. + References No definition available. + Details
Name: | bdc_GoodwillQualitativeAssessment
Namespace Prefix: | bdc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Increase in non current deferred tax assets for balance sheet classification of deferred taxes. + References No definition available. + Details
Name: | bdc_IncreaseInNonCurrentDeferredTaxAssetsForBalanceSheetClassificationOfDeferredTaxes
Namespace Prefix: | bdc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Increase in non current deferred tax liabilities for balance sheet classification of deferred taxes. + References No definition available. + Details
Name: | bdc_IncreaseInNonCurrentDeferredTaxLiabilitiesForBalanceSheetClassificationOfDeferredTaxes
Namespace Prefix: | bdc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Number of customers with significant accounts receivable balance recovered. + References No definition available. + Details
Name: | bdc_NumberOfCustomersWithSignificantAccountsReceivableBalanceRecovered
Namespace Prefix: | bdc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Significant Accounting Policies [Line Items] + References No definition available. + Details
Name: | bdc_SignificantAccountingPoliciesLineItems
Namespace Prefix: | bdc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Unprocessed adjustments recognized against accounts receivable. + References No definition available. + Details
Name: | bdc_UnprocessedAdjustmentsRecognizedAgainstAccountsReceivable
Namespace Prefix: | bdc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -SubTopic 35 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848 + Details
Name: | us-gaap_AdvertisingExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.4) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5074-111524 + Details
Name: | us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of increase (decrease) in the allowance for doubtful accounts. + References No definition available. + Details
Name: | us-gaap_AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of recoveries of receivables doubtful of collection that were previously charged off. + References No definition available. + Details
Name: | us-gaap_AllowanceForDoubtfulAccountsReceivableRecoveries
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 + Details
Name: | us-gaap_CashAndCashEquivalentsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption. + References No definition available. + Details
Name: | us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Describes pertinent information about the defined benefit plan that is not otherwise reflected in the taxonomy. + References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlanOtherInformation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571 + Details
Name: | us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35755396&loc=d3e33749-111570 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_EquityMethodInvestments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16373-109275 + Details
Name: | us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The increase (decrease) during the reporting period in the aggregate amount of expenses incurred but not yet paid. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 + Details
Name: | us-gaap_IncreaseDecreaseInAccruedLiabilities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of valuation reserve for inventory. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.BB) -URI http://asc.fasb.org/extlink&oid=27011343&loc=d3e100047-122729 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.6(a)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -SubTopic 10 -Section 35 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=51655945&loc=d3e3927-108312 + Details
Name: | us-gaap_InventoryValuationReserves
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Number of reporting units tested for impairment of goodwill. A reporting unit is an operating segment or one level below an operating segment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Reporting Unit -URI http://asc.fasb.org/extlink&oid=6523643 + Details
Name: | us-gaap_NumberOfReportingUnits
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Describes the periods of time over which an entity anticipates to receive utility from its property, plant and equipment (that is, the periods of time over which an entity allocates the initial cost of its property, plant and equipment). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=51655414&loc=d3e18780-107790 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 35 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=51661791&loc=d3e1205-110223 + Details
Name: | us-gaap_PropertyPlantAndEquipmentEstimatedUsefulLives
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FairValueByMeasurementBasisAxis=bdc_QualitativeAssessmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByMeasurementBasisAxis=bdc_QuantitativeAssessmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=bdc_CurrentAssetMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=bdc_LongTermDebtNoncurrentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=us-gaap_OtherNoncurrentAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_BuildingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_MachineryAndEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=bdc_ComputerEquipmentAndSoftwareMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=bdc_HirschmannJvMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |