XML 68 R54.htm IDEA: XBRL DOCUMENT
v3.6.0.2

Goodwill And Other Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Goodwill And Other Intangible Assets [Line Items] |  |  |
Purchased software costs, capitalized | $ 1,856 | $ 934 | $ 1,178
Minimum [Member] | Customer Relationships [Member] |  |  |
Goodwill And Other Intangible Assets [Line Items] |  |  |
Estimated useful life | 10 years |  |
Minimum [Member] | Purchased Software Costs [Member] |  |  |
Goodwill And Other Intangible Assets [Line Items] |  |  |
Estimated useful life | 2 years |  |
Maximum [Member] | Customer Relationships [Member] |  |  |
Goodwill And Other Intangible Assets [Line Items] |  |  |
Estimated useful life | 14 years |  |
Maximum [Member] | Purchased Software Costs [Member] |  |  |
Goodwill And Other Intangible Assets [Line Items] |  |  |
Estimated useful life | 10 years |  |

X
- Definition Goodwill And Other Intangible Assets [Line Items] + References No definition available. + Details
Name: | bhe_GoodwillAndOtherIntangibleAssetsLineItems
Namespace Prefix: | bhe_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The cash outflow associated with the development, modification or acquisition of software programs or applications for internal use (that is, not to be sold, leased or otherwise marketed to others) that qualify for capitalization. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3213-108585 + Details
Name: | us-gaap_PaymentsForSoftware
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_CustomerRelationshipsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_ComputerSoftwareIntangibleAssetMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |