XML 56 R45.htm IDEA: XBRL DOCUMENT
v3.5.0.2

SEGMENTS (Details) $ in Thousands | 3 Months Ended | 6 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Sep. 30, 2016 USD ($) | Sep. 30, 2015 USD ($) | Jun. 30, 2016 USD ($) | Sep. 30, 2016 USD ($) Industry Segment | Sep. 30, 2015 USD ($) | Dec. 31, 2015 USD ($)
SEGMENTS [Abstract] |  |  |  |  |  |  |
Number of industry in which entity operates | Industry |  |  |  | 1 |  |  |
Number of reportable operating segments | Segment |  |  |  | 3 |  |  |
Summary of key financial data [Abstract] |  |  |  |  |  |  |
Net sales to external customers | $ 128,809 | $ 144,161 |  | $ 381,614 | $ 431,834 |  |
Net sales | 128,809 | 144,161 |  | 381,614 | 431,834 |  |
Income (loss) from operations | 9,309 | 7,307 |  | (84,135) | 23,805 |  |
Total Assets | 439,623 |  |  | 439,623 |  | $ 578,505 | [1]
Impairment charges |  |  | $ 106,000 |  |  |  |
North America [Member] |  |  |  |  |  |  |
Summary of key financial data [Abstract] |  |  |  |  |  |  |
Impairment charges |  |  | 44,000 |  |  |  |
Asia [Member] |  |  |  |  |  |  |
Summary of key financial data [Abstract] |  |  |  |  |  |  |
Impairment charges |  |  | 41,700 |  |  |  |
Europe [Member] |  |  |  |  |  |  |
Summary of key financial data [Abstract] |  |  |  |  |  |  |
Impairment charges |  |  | $ 20,300 |  |  |  |
Reportable Operating Segments [Member] | North America [Member] |  |  |  |  |  |  |
Summary of key financial data [Abstract] |  |  |  |  |  |  |
Net sales to external customers | 63,305 | 77,912 |  | 196,955 | 231,176 |  |
Net sales | 66,503 | 81,483 |  | 206,232 | 252,991 |  |
Income (loss) from operations | 693 | 5,777 |  | (41,103) | 8,031 |  |
Total Assets | 171,706 |  |  | 171,706 |  | 238,930 |
Reportable Operating Segments [Member] | Asia [Member] |  |  |  |  |  |  |
Summary of key financial data [Abstract] |  |  |  |  |  |  |
Net sales to external customers | 47,188 | 48,320 |  | 126,673 | 142,451 |  |
Net sales | 71,334 | 74,235 |  | 197,952 | 227,574 |  |
Income (loss) from operations | 8,332 | 1,441 |  | (25,026) | 7,154 |  |
Total Assets | 169,968 |  |  | 169,968 |  | 231,063 |
Reportable Operating Segments [Member] | Europe [Member] |  |  |  |  |  |  |
Summary of key financial data [Abstract] |  |  |  |  |  |  |
Net sales to external customers | 18,316 | 17,929 |  | 57,986 | 58,207 |  |
Net sales | 21,417 | 38,479 |  | 67,222 | 121,983 |  |
Income (loss) from operations | 284 | 89 |  | (18,006) | 8,620 |  |
Total Assets | 97,949 |  |  | 97,949 |  | $ 108,512 |
Intersegment Elimination [Member] |  |  |  |  |  |  |
Summary of key financial data [Abstract] |  |  |  |  |  |  |
Net sales | $ (30,445) | $ (50,036) |  | $ (89,792) | $ (170,714) |  |
[1] | (Revised)

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 Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=68055307&loc=d3e2420-110228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 + Details
Name: | us-gaap_AssetImpairmentCharges
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(12)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(11)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
Name: | us-gaap_Assets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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
- References No definition available. + 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=63488584&loc=d3e20235-122688 + 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=63488584&loc=d3e20235-122688 + Details
Name: | us-gaap_SalesRevenueGoodsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_SegmentReportingAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

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