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Investments in Affiliated Companies (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Schedule of Equity Method Investments [Line Items] |  |  |
Equity Method Investment Pro Rata Share Of Debt Obligations Of Joint Venture | $ 7,700 |  |
Equity in earnings of affiliated companies | 6,736 | 6,369 | 4,731
Investments in affiliated companies | 60,579 | 59,455 |
Marubun/Arrow [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Equity Method Investment, Ownership Percentage | 50.00% |  |
Equity in earnings of affiliated companies | 5,338 | 5,185 | 3,745
Investments in affiliated companies | 45,626 | 41,971 |
Altech Industries [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Equity Method Investment, Ownership Percentage | 50.00% |  |
Equity in earnings of affiliated companies | 1,398 | 1,184 | 1,004
Investments in affiliated companies | 14,953 | 17,484 |
Other [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Equity in earnings of affiliated companies | $ 0 | $ 0 | $ (18)

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- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 159 -Paragraph 18 -Subparagraph f -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 18 -Paragraph 20 -Subparagraph a (1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571 + Details
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