XML 16 R46.htm IDEA: XBRL DOCUMENT
v2.4.1.9

SEGMENTS (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2015 Segment Industry | Mar. 31, 2014
SEGMENTS [Abstract] |  |
Number of industry in which entity operates | 1 belfb_NumberOfIndustryInWhichEntityOperates |
Number of reportable operating segments | 3 us-gaap_NumberOfReportableSegments |
Summary of key financial data [Abstract] |  |
Net Sales | $ 142,015 us-gaap_SalesRevenueGoodsNet | $ 82,646 us-gaap_SalesRevenueGoodsNet
Income from operations | 9,359 us-gaap_OperatingIncomeLoss | 2,881 us-gaap_OperatingIncomeLoss
Reportable Operating Segments [Member] |  |
Summary of key financial data [Abstract] |  |
Net Sales to External Customers | 142,015 us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember | 82,646 us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember
Income from operations | 9,359 us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember | 2,881 us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember
Reportable Operating Segments [Member] | Power Solutions [Member] |  |
Summary of key financial data [Abstract] |  |
Net Sales to External Customers | 41,665 us-gaap_Revenues / us-gaap_BusinessAcquisitionAxis = belfb_PowerSolutionsMember / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember |
Income from operations | 4,924 us-gaap_OperatingIncomeLoss / us-gaap_BusinessAcquisitionAxis = belfb_PowerSolutionsMember / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember |
Reportable Operating Segments [Member] | Connectivity Solutions [Member] |  |
Summary of key financial data [Abstract] |  |
Net Sales to External Customers | 17,145 us-gaap_Revenues / us-gaap_BusinessAcquisitionAxis = belfb_EmersonNetworkPowerConnectivitySolutionsMember / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember |
Income from operations | 951 us-gaap_OperatingIncomeLoss / us-gaap_BusinessAcquisitionAxis = belfb_EmersonNetworkPowerConnectivitySolutionsMember / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember |
Reportable Operating Segments [Member] | 2014 Acquisitions [Member] |  |
Summary of key financial data [Abstract] |  |
Net Sales to External Customers | 58,810 us-gaap_Revenues / us-gaap_BusinessAcquisitionAxis = belfb_AcquiredCompaniesMember / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember |
Income from operations | 5,875 us-gaap_OperatingIncomeLoss / us-gaap_BusinessAcquisitionAxis = belfb_AcquiredCompaniesMember / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember |
North America [Member] | Reportable Operating Segments [Member] |  |
Summary of key financial data [Abstract] |  |
Net Sales to External Customers | 76,760 us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = us-gaap_NorthAmericaMember | 28,732 us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = us-gaap_NorthAmericaMember
Net Sales | 87,017 us-gaap_SalesRevenueGoodsNet / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = us-gaap_NorthAmericaMember | 31,454 us-gaap_SalesRevenueGoodsNet / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = us-gaap_NorthAmericaMember
Income from operations | 3,506 us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = us-gaap_NorthAmericaMember | 882 us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = us-gaap_NorthAmericaMember
North America [Member] | Reportable Operating Segments [Member] | Power Solutions [Member] |  |
Summary of key financial data [Abstract] |  |
Net Sales to External Customers | 33,400 us-gaap_Revenues / us-gaap_BusinessAcquisitionAxis = belfb_PowerSolutionsMember / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = us-gaap_NorthAmericaMember |
Income from operations | 1,135 us-gaap_OperatingIncomeLoss / us-gaap_BusinessAcquisitionAxis = belfb_PowerSolutionsMember / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = us-gaap_NorthAmericaMember |
North America [Member] | Reportable Operating Segments [Member] | Connectivity Solutions [Member] |  |
Summary of key financial data [Abstract] |  |
Net Sales to External Customers | 14,489 us-gaap_Revenues / us-gaap_BusinessAcquisitionAxis = belfb_EmersonNetworkPowerConnectivitySolutionsMember / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = us-gaap_NorthAmericaMember |
Income from operations | 936 us-gaap_OperatingIncomeLoss / us-gaap_BusinessAcquisitionAxis = belfb_EmersonNetworkPowerConnectivitySolutionsMember / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = us-gaap_NorthAmericaMember |
North America [Member] | Reportable Operating Segments [Member] | 2014 Acquisitions [Member] |  |
Summary of key financial data [Abstract] |  |
Net Sales to External Customers | 47,889 us-gaap_Revenues / us-gaap_BusinessAcquisitionAxis = belfb_AcquiredCompaniesMember / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = us-gaap_NorthAmericaMember |
Income from operations | 2,071 us-gaap_OperatingIncomeLoss / us-gaap_BusinessAcquisitionAxis = belfb_AcquiredCompaniesMember / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = us-gaap_NorthAmericaMember |
Asia [Member] | Reportable Operating Segments [Member] |  |
Summary of key financial data [Abstract] |  |
Net Sales to External Customers | 45,521 us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = us-gaap_AsiaMember | 43,048 us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = us-gaap_AsiaMember
Net Sales | 73,149 us-gaap_SalesRevenueGoodsNet / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = us-gaap_AsiaMember | 49,891 us-gaap_SalesRevenueGoodsNet / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = us-gaap_AsiaMember
Income from operations | 666 us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = us-gaap_AsiaMember | 1,673 us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = us-gaap_AsiaMember
Asia [Member] | Reportable Operating Segments [Member] | Power Solutions [Member] |  |
Summary of key financial data [Abstract] |  |
Net Sales to External Customers | 350 us-gaap_Revenues / us-gaap_BusinessAcquisitionAxis = belfb_PowerSolutionsMember / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = us-gaap_AsiaMember |
Income from operations | (832)us-gaap_OperatingIncomeLoss / us-gaap_BusinessAcquisitionAxis = belfb_PowerSolutionsMember / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = us-gaap_AsiaMember |
Asia [Member] | Reportable Operating Segments [Member] | Connectivity Solutions [Member] |  |
Summary of key financial data [Abstract] |  |
Net Sales to External Customers | 1,078 us-gaap_Revenues / us-gaap_BusinessAcquisitionAxis = belfb_EmersonNetworkPowerConnectivitySolutionsMember / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = us-gaap_AsiaMember |
Income from operations | (166)us-gaap_OperatingIncomeLoss / us-gaap_BusinessAcquisitionAxis = belfb_EmersonNetworkPowerConnectivitySolutionsMember / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = us-gaap_AsiaMember |
Asia [Member] | Reportable Operating Segments [Member] | 2014 Acquisitions [Member] |  |
Summary of key financial data [Abstract] |  |
Net Sales to External Customers | 1,428 us-gaap_Revenues / us-gaap_BusinessAcquisitionAxis = belfb_AcquiredCompaniesMember / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = us-gaap_AsiaMember |
Income from operations | (998)us-gaap_OperatingIncomeLoss / us-gaap_BusinessAcquisitionAxis = belfb_AcquiredCompaniesMember / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = us-gaap_AsiaMember |
Europe [Member] | Reportable Operating Segments [Member] |  |
Summary of key financial data [Abstract] |  |
Net Sales to External Customers | 19,734 us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = us-gaap_EuropeMember | 10,866 us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = us-gaap_EuropeMember
Net Sales | 41,537 us-gaap_SalesRevenueGoodsNet / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = us-gaap_EuropeMember | 10,892 us-gaap_SalesRevenueGoodsNet / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = us-gaap_EuropeMember
Income from operations | 5,187 us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = us-gaap_EuropeMember | 326 us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = us-gaap_EuropeMember
Europe [Member] | Reportable Operating Segments [Member] | Power Solutions [Member] |  |
Summary of key financial data [Abstract] |  |
Net Sales to External Customers | 7,915 us-gaap_Revenues / us-gaap_BusinessAcquisitionAxis = belfb_PowerSolutionsMember / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = us-gaap_EuropeMember |
Income from operations | 4,621 us-gaap_OperatingIncomeLoss / us-gaap_BusinessAcquisitionAxis = belfb_PowerSolutionsMember / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = us-gaap_EuropeMember |
Europe [Member] | Reportable Operating Segments [Member] | Connectivity Solutions [Member] |  |
Summary of key financial data [Abstract] |  |
Net Sales to External Customers | 1,578 us-gaap_Revenues / us-gaap_BusinessAcquisitionAxis = belfb_EmersonNetworkPowerConnectivitySolutionsMember / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = us-gaap_EuropeMember |
Income from operations | 181 us-gaap_OperatingIncomeLoss / us-gaap_BusinessAcquisitionAxis = belfb_EmersonNetworkPowerConnectivitySolutionsMember / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = us-gaap_EuropeMember |
Europe [Member] | Reportable Operating Segments [Member] | 2014 Acquisitions [Member] |  |
Summary of key financial data [Abstract] |  |
Net Sales to External Customers | 9,493 us-gaap_Revenues / us-gaap_BusinessAcquisitionAxis = belfb_AcquiredCompaniesMember / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = us-gaap_EuropeMember |
Income from operations | 4,802 us-gaap_OperatingIncomeLoss / us-gaap_BusinessAcquisitionAxis = belfb_AcquiredCompaniesMember / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = us-gaap_EuropeMember |
Intersegment Elimination [Member] |  |
Summary of key financial data [Abstract] |  |
Net Sales | $ (59,688)us-gaap_SalesRevenueGoodsNet / us-gaap_StatementGeographicalAxis = us-gaap_IntersegmentEliminationMember | $ (9,591)us-gaap_SalesRevenueGoodsNet / us-gaap_StatementGeographicalAxis = us-gaap_IntersegmentEliminationMember

X
- Definition Number of industry in which entity operates with its reportable operating segments. + References No definition available. + Details
Name: | belfb_NumberOfIndustryInWhichEntityOperates
Namespace Prefix: | belfb_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
Name: | us-gaap_NumberOfReportableSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The net result for the period of deducting operating expenses from operating revenues. + References No definition available. + Details
Name: | us-gaap_OperatingIncomeLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
Name: | us-gaap_Revenues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(a)) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
Name: | us-gaap_SalesRevenueGoodsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_SegmentReportingAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_ConsolidationItemsAxis=us-gaap_ReportableGeographicalComponentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=us-gaap_AsiaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=us-gaap_EuropeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=us-gaap_IntersegmentEliminationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=us-gaap_NorthAmericaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |