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v2.4.1.9

Operating Segments - Operating Segment Information (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended |
--- | --- | ---
Mar. 29, 2015 | Mar. 30, 2014 | Dec. 31, 2014
Segment Reporting Information [Line Items] |  |  |
Segment Revenues | $ 546,957 us-gaap_SalesRevenueGoodsNet | $ 487,690 us-gaap_SalesRevenueGoodsNet |
Segment depreciation and amortization | 38,045 us-gaap_DepreciationDepletionAndAmortization | 21,238 us-gaap_DepreciationDepletionAndAmortization |
Segment assets | 3,460,947 us-gaap_Assets |  | 3,262,827 us-gaap_Assets
Reportable Segment [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Segment Revenues | 569,451 us-gaap_SalesRevenueGoodsNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember | 488,307 us-gaap_SalesRevenueGoodsNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember |
Affiliate revenues | 2,313 us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember | 3,633 us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember |
Segment EBITDA | 88,274 bdc_EarningsBeforeInterestTaxesDepreciationAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember | 73,616 bdc_EarningsBeforeInterestTaxesDepreciationAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember |
Segment depreciation and amortization | 38,045 us-gaap_DepreciationDepletionAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember | 21,238 us-gaap_DepreciationDepletionAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember |
Segment assets | 991,410 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember | 852,387 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember |
Reportable Segment [Member] | Broadcast Solutions [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Segment Revenues | 213,586 us-gaap_SalesRevenueGoodsNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = bdc_BroadcastSolutionsMember | 166,485 us-gaap_SalesRevenueGoodsNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = bdc_BroadcastSolutionsMember |
Affiliate revenues | 341 us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = bdc_BroadcastSolutionsMember | 199 us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = bdc_BroadcastSolutionsMember |
Segment EBITDA | 29,232 bdc_EarningsBeforeInterestTaxesDepreciationAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = bdc_BroadcastSolutionsMember | 26,171 bdc_EarningsBeforeInterestTaxesDepreciationAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = bdc_BroadcastSolutionsMember |
Segment depreciation and amortization | 16,905 us-gaap_DepreciationDepletionAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = bdc_BroadcastSolutionsMember | 13,400 us-gaap_DepreciationDepletionAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = bdc_BroadcastSolutionsMember |
Segment assets | 418,175 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = bdc_BroadcastSolutionsMember | 292,690 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = bdc_BroadcastSolutionsMember |
Reportable Segment [Member] | Enterprise Connectivity Solutions [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Segment Revenues | 104,695 us-gaap_SalesRevenueGoodsNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = bdc_EnterpriseConnectivitySolutionsMember | 108,394 us-gaap_SalesRevenueGoodsNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = bdc_EnterpriseConnectivitySolutionsMember |
Affiliate revenues | 1,620 us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = bdc_EnterpriseConnectivitySolutionsMember | 2,076 us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = bdc_EnterpriseConnectivitySolutionsMember |
Segment EBITDA | 13,881 bdc_EarningsBeforeInterestTaxesDepreciationAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = bdc_EnterpriseConnectivitySolutionsMember | 14,175 bdc_EarningsBeforeInterestTaxesDepreciationAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = bdc_EnterpriseConnectivitySolutionsMember |
Segment depreciation and amortization | 3,140 us-gaap_DepreciationDepletionAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = bdc_EnterpriseConnectivitySolutionsMember | 3,868 us-gaap_DepreciationDepletionAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = bdc_EnterpriseConnectivitySolutionsMember |
Segment assets | 210,120 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = bdc_EnterpriseConnectivitySolutionsMember | 228,401 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = bdc_EnterpriseConnectivitySolutionsMember |
Reportable Segment [Member] | Industrial Connectivity Solutions [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Segment Revenues | 152,972 us-gaap_SalesRevenueGoodsNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = bdc_IndustrialConnectivitySolutionsMember | 159,318 us-gaap_SalesRevenueGoodsNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = bdc_IndustrialConnectivitySolutionsMember |
Affiliate revenues | 323 us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = bdc_IndustrialConnectivitySolutionsMember | 1,356 us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = bdc_IndustrialConnectivitySolutionsMember |
Segment EBITDA | 24,173 bdc_EarningsBeforeInterestTaxesDepreciationAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = bdc_IndustrialConnectivitySolutionsMember | 23,682 bdc_EarningsBeforeInterestTaxesDepreciationAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = bdc_IndustrialConnectivitySolutionsMember |
Segment depreciation and amortization | 3,674 us-gaap_DepreciationDepletionAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = bdc_IndustrialConnectivitySolutionsMember | 2,649 us-gaap_DepreciationDepletionAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = bdc_IndustrialConnectivitySolutionsMember |
Segment assets | 257,059 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = bdc_IndustrialConnectivitySolutionsMember | 270,295 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = bdc_IndustrialConnectivitySolutionsMember |
Reportable Segment [Member] | Industrial IT Solutions [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Segment Revenues | 61,073 us-gaap_SalesRevenueGoodsNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = bdc_IndustrialInformationTechnologySolutionsMember | 54,110 us-gaap_SalesRevenueGoodsNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = bdc_IndustrialInformationTechnologySolutionsMember |
Affiliate revenues | 21 us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = bdc_IndustrialInformationTechnologySolutionsMember | 2 us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = bdc_IndustrialInformationTechnologySolutionsMember |
Segment EBITDA | 11,087 bdc_EarningsBeforeInterestTaxesDepreciationAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = bdc_IndustrialInformationTechnologySolutionsMember | 9,588 bdc_EarningsBeforeInterestTaxesDepreciationAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = bdc_IndustrialInformationTechnologySolutionsMember |
Segment depreciation and amortization | 1,969 us-gaap_DepreciationDepletionAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = bdc_IndustrialInformationTechnologySolutionsMember | 1,321 us-gaap_DepreciationDepletionAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = bdc_IndustrialInformationTechnologySolutionsMember |
Segment assets | 62,559 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = bdc_IndustrialInformationTechnologySolutionsMember | 61,001 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = bdc_IndustrialInformationTechnologySolutionsMember |
Reportable Segment [Member] | Network Security Solutions [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Segment Revenues | 37,125 us-gaap_SalesRevenueGoodsNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = bdc_NetworkSecuritySolutionsMember |  |
Affiliate revenues | 8 us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = bdc_NetworkSecuritySolutionsMember |  |
Segment EBITDA | 9,901 bdc_EarningsBeforeInterestTaxesDepreciationAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = bdc_NetworkSecuritySolutionsMember |  |
Segment depreciation and amortization | 12,357 us-gaap_DepreciationDepletionAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = bdc_NetworkSecuritySolutionsMember |  |
Segment assets | $ 43,497 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = bdc_NetworkSecuritySolutionsMember |  |

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