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Investments in Affiliated Companies (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Schedule of Equity Method Investments [Line Items] |  |  |
Investments in affiliated companies | $ 65,603 | $ 60,579 |
Equity in earnings of affiliated companies | 8,112 | 6,736 | 6,369
Equity Method Investment Pro Rata Share Of Debt Obligations Of Joint Venture | 2,900 |  |
Marubun/Arrow [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Equity Method Investment, Ownership Percentage | 50.00% |  |
Investments in affiliated companies | 50,864 | 45,626 |
Equity in earnings of affiliated companies | 6,825 | 5,338 | 5,185
Altech Industries [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Equity Method Investment, Ownership Percentage | 50.00% |  |
Investments in affiliated companies | 14,739 | 14,953 |
Equity in earnings of affiliated companies | $ 1,287 | $ 1,398 | $ 1,184

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