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Restructuring Charges (Schedule Of Components Of Restructuring Charges) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Restructuring Cost and Reserve [Line Items] |  |  |
Total restructuring charges | $ 1,049 us-gaap_RestructuringCharges | $ 7,084 us-gaap_RestructuringCharges |
2014 [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Severance costs | 876 us-gaap_SeveranceCosts1 / us-gaap_RestructuringCostAndReserveAxis = bhe_TwothousandfourteenmemberMember |  |
Other exit costs | 3 us-gaap_BusinessExitCosts1 / us-gaap_RestructuringCostAndReserveAxis = bhe_TwothousandfourteenmemberMember |  |
Total restructuring charges | 879 us-gaap_RestructuringCharges / us-gaap_RestructuringCostAndReserveAxis = bhe_TwothousandfourteenmemberMember |  |
2014 [Member] | Americas [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Severance costs | 827 us-gaap_SeveranceCosts1 / us-gaap_RestructuringCostAndReserveAxis = bhe_TwothousandfourteenmemberMember / us-gaap_StatementGeographicalAxis = us-gaap_AmericasMember |  |
Other exit costs | 0 us-gaap_BusinessExitCosts1 / us-gaap_RestructuringCostAndReserveAxis = bhe_TwothousandfourteenmemberMember / us-gaap_StatementGeographicalAxis = us-gaap_AmericasMember |  |
Total restructuring charges | 827 us-gaap_RestructuringCharges / us-gaap_RestructuringCostAndReserveAxis = bhe_TwothousandfourteenmemberMember / us-gaap_StatementGeographicalAxis = us-gaap_AmericasMember |  |
2014 [Member] | Asia [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Severance costs | 49 us-gaap_SeveranceCosts1 / us-gaap_RestructuringCostAndReserveAxis = bhe_TwothousandfourteenmemberMember / us-gaap_StatementGeographicalAxis = us-gaap_AsiaMember |  |
Other exit costs | 3 us-gaap_BusinessExitCosts1 / us-gaap_RestructuringCostAndReserveAxis = bhe_TwothousandfourteenmemberMember / us-gaap_StatementGeographicalAxis = us-gaap_AsiaMember |  |
Total restructuring charges | 52 us-gaap_RestructuringCharges / us-gaap_RestructuringCostAndReserveAxis = bhe_TwothousandfourteenmemberMember / us-gaap_StatementGeographicalAxis = us-gaap_AsiaMember |  |
2013 [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Severance costs |  | 2,202 us-gaap_SeveranceCosts1 / us-gaap_RestructuringCostAndReserveAxis = bhe_TwothousandthirteenmemberMember |
Facility lease costs |  | 142 bhe_Facilityleaseobligationsotherbusinessexitcosts / us-gaap_RestructuringCostAndReserveAxis = bhe_TwothousandthirteenmemberMember |
Other exit costs |  | 3,246 us-gaap_BusinessExitCosts1 / us-gaap_RestructuringCostAndReserveAxis = bhe_TwothousandthirteenmemberMember |
Total restructuring charges |  | 5,590 us-gaap_RestructuringCharges / us-gaap_RestructuringCostAndReserveAxis = bhe_TwothousandthirteenmemberMember |
2013 [Member] | Americas [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Severance costs |  | 2,202 us-gaap_SeveranceCosts1 / us-gaap_RestructuringCostAndReserveAxis = bhe_TwothousandthirteenmemberMember / us-gaap_StatementGeographicalAxis = us-gaap_AmericasMember |
Facility lease costs |  | 142 bhe_Facilityleaseobligationsotherbusinessexitcosts / us-gaap_RestructuringCostAndReserveAxis = bhe_TwothousandthirteenmemberMember / us-gaap_StatementGeographicalAxis = us-gaap_AmericasMember |
Other exit costs |  | 2,118 us-gaap_BusinessExitCosts1 / us-gaap_RestructuringCostAndReserveAxis = bhe_TwothousandthirteenmemberMember / us-gaap_StatementGeographicalAxis = us-gaap_AmericasMember |
Total restructuring charges |  | 4,462 us-gaap_RestructuringCharges / us-gaap_RestructuringCostAndReserveAxis = bhe_TwothousandthirteenmemberMember / us-gaap_StatementGeographicalAxis = us-gaap_AmericasMember |
2013 [Member] | Asia [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Severance costs |  | 0 us-gaap_SeveranceCosts1 / us-gaap_RestructuringCostAndReserveAxis = bhe_TwothousandthirteenmemberMember / us-gaap_StatementGeographicalAxis = us-gaap_AsiaMember |
Facility lease costs |  | 0 bhe_Facilityleaseobligationsotherbusinessexitcosts / us-gaap_RestructuringCostAndReserveAxis = bhe_TwothousandthirteenmemberMember / us-gaap_StatementGeographicalAxis = us-gaap_AsiaMember |
Other exit costs |  | 1,128 us-gaap_BusinessExitCosts1 / us-gaap_RestructuringCostAndReserveAxis = bhe_TwothousandthirteenmemberMember / us-gaap_StatementGeographicalAxis = us-gaap_AsiaMember |
Total restructuring charges |  | 1,128 us-gaap_RestructuringCharges / us-gaap_RestructuringCostAndReserveAxis = bhe_TwothousandthirteenmemberMember / us-gaap_StatementGeographicalAxis = us-gaap_AsiaMember |
2012 [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Severance costs |  |  | 1,529 us-gaap_SeveranceCosts1 / us-gaap_RestructuringCostAndReserveAxis = bhe_TwothousandtwelvememberMember
Facility lease costs |  |  | 55 bhe_Facilityleaseobligationsotherbusinessexitcosts / us-gaap_RestructuringCostAndReserveAxis = bhe_TwothousandtwelvememberMember
Other exit costs |  |  | 209 us-gaap_BusinessExitCosts1 / us-gaap_RestructuringCostAndReserveAxis = bhe_TwothousandtwelvememberMember
Total restructuring charges |  |  | 1,793 us-gaap_RestructuringCharges / us-gaap_RestructuringCostAndReserveAxis = bhe_TwothousandtwelvememberMember
2012 [Member] | Americas [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Severance costs |  |  | 494 us-gaap_SeveranceCosts1 / us-gaap_RestructuringCostAndReserveAxis = bhe_TwothousandtwelvememberMember / us-gaap_StatementGeographicalAxis = us-gaap_AmericasMember
Facility lease costs |  |  | 0 bhe_Facilityleaseobligationsotherbusinessexitcosts / us-gaap_RestructuringCostAndReserveAxis = bhe_TwothousandtwelvememberMember / us-gaap_StatementGeographicalAxis = us-gaap_AmericasMember
Other exit costs |  |  | 0 us-gaap_BusinessExitCosts1 / us-gaap_RestructuringCostAndReserveAxis = bhe_TwothousandtwelvememberMember / us-gaap_StatementGeographicalAxis = us-gaap_AmericasMember
Total restructuring charges |  |  | 494 us-gaap_RestructuringCharges / us-gaap_RestructuringCostAndReserveAxis = bhe_TwothousandtwelvememberMember / us-gaap_StatementGeographicalAxis = us-gaap_AmericasMember
2012 [Member] | Europe [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Severance costs |  |  | 531 us-gaap_SeveranceCosts1 / us-gaap_RestructuringCostAndReserveAxis = bhe_TwothousandtwelvememberMember / us-gaap_StatementGeographicalAxis = us-gaap_EuropeMember
Facility lease costs |  |  | 0 bhe_Facilityleaseobligationsotherbusinessexitcosts / us-gaap_RestructuringCostAndReserveAxis = bhe_TwothousandtwelvememberMember / us-gaap_StatementGeographicalAxis = us-gaap_EuropeMember
Other exit costs |  |  | 176 us-gaap_BusinessExitCosts1 / us-gaap_RestructuringCostAndReserveAxis = bhe_TwothousandtwelvememberMember / us-gaap_StatementGeographicalAxis = us-gaap_EuropeMember
Total restructuring charges |  |  | 707 us-gaap_RestructuringCharges / us-gaap_RestructuringCostAndReserveAxis = bhe_TwothousandtwelvememberMember / us-gaap_StatementGeographicalAxis = us-gaap_EuropeMember
2012 [Member] | Asia [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Severance costs |  |  | 504 us-gaap_SeveranceCosts1 / us-gaap_RestructuringCostAndReserveAxis = bhe_TwothousandtwelvememberMember / us-gaap_StatementGeographicalAxis = us-gaap_AsiaMember
Facility lease costs |  |  | 55 bhe_Facilityleaseobligationsotherbusinessexitcosts / us-gaap_RestructuringCostAndReserveAxis = bhe_TwothousandtwelvememberMember / us-gaap_StatementGeographicalAxis = us-gaap_AsiaMember
Other exit costs |  |  | 33 us-gaap_BusinessExitCosts1 / us-gaap_RestructuringCostAndReserveAxis = bhe_TwothousandtwelvememberMember / us-gaap_StatementGeographicalAxis = us-gaap_AsiaMember
Total restructuring charges |  |  | $ 592 us-gaap_RestructuringCharges / us-gaap_RestructuringCostAndReserveAxis = bhe_TwothousandtwelvememberMember / us-gaap_StatementGeographicalAxis = us-gaap_AsiaMember

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- Definition Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Includes, but is not limited to, one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and termination benefits associated with an ongoing benefit arrangement. Excludes expenses associated with special or contractual termination benefits, a discontinued operation or an asset retirement obligation. + 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 (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.P.3) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 + Details
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- Definition Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation. + 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 (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.P.3) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 + Details
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- Definition Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation. + 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 (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.P.3) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(10) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 + Details
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