XML 92 R78.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Major Customers (Schedule Of Sales To Largest Customers) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2015
International Business Machines Corporation [Member] |  |
Entity Wide Revenue Major Customer [Line Items] |  |
Sales to our largest customers | $ 284,636 | $ 284,098
Applied Materials, Inc. [Member] |  |
Entity Wide Revenue Major Customer [Line Items] |  |
Sales to our largest customers | $ 248,183 |

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_EntityWideRevenueMajorCustomerLineItems
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
- Details
Name: | us-gaap_MajorCustomersAxis=bhe_InternationalbusinessmachinescorporationmemberMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MajorCustomersAxis=bhe_AppliedMaterialsIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |