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v2.4.1.9

Operating Segments and Geographic Information - Reconciliations of Other Segment Measures to Consolidated Totals (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Total assets | $ 3,262,827 us-gaap_Assets | $ 2,751,753 us-gaap_Assets | $ 2,584,583 us-gaap_Assets |
Cash and cash equivalents | 741,162 us-gaap_CashAndCashEquivalentsAtCarryingValue | 613,304 us-gaap_CashAndCashEquivalentsAtCarryingValue | 395,095 us-gaap_CashAndCashEquivalentsAtCarryingValue | 382,552 us-gaap_CashAndCashEquivalentsAtCarryingValue
Goodwill | 943,374 us-gaap_Goodwill | 773,048 us-gaap_Goodwill | 778,708 us-gaap_Goodwill |
Intangible assets, less accumulated amortization | 461,292 us-gaap_IntangibleAssetsNetExcludingGoodwill | 376,976 us-gaap_IntangibleAssetsNetExcludingGoodwill | 428,273 us-gaap_IntangibleAssetsNetExcludingGoodwill |
Deferred income taxes | 62,809 bdc_CurrentAndNoncurrentDeferredTaxAssets | 54,801 bdc_CurrentAndNoncurrentDeferredTaxAssets | 66,855 bdc_CurrentAndNoncurrentDeferredTaxAssets |
Income tax receivable | 4,953 us-gaap_IncomeTaxesReceivable | 12,169 us-gaap_IncomeTaxesReceivable | 8,432 us-gaap_IncomeTaxesReceivable |
Total acquisition of property, plant and equipment | 45,459 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment | 40,209 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment | 41,010 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment |
Total depreciation and amortization | (102,162)us-gaap_DepreciationDepletionAndAmortization | (94,451)us-gaap_DepreciationDepletionAndAmortization | (59,355)us-gaap_DepreciationDepletionAndAmortization |
Discontinued operations [Member] |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Total acquisition of property, plant and equipment |  |  | 795 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = bdc_DiscontinuedOperationsMember |
Total depreciation and amortization |  |  | (1,468)us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = bdc_DiscontinuedOperationsMember |
Reportable Segment [Member] |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Total assets | 960,782 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember | 833,585 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember | 825,123 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember |
Total acquisition of property, plant and equipment | 42,442 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember | 38,791 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember | 39,879 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember |
Total depreciation and amortization | (102,162)us-gaap_DepreciationDepletionAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember | (94,451)us-gaap_DepreciationDepletionAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember | (57,887)us-gaap_DepreciationDepletionAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember |
Corporate assets [Member] |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Total assets | 88,455 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember | 87,870 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember | 82,097 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember |
Total acquisition of property, plant and equipment | $ 3,017 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember | $ 1,418 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember | $ 336 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember |

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