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Other Accounts Receivable And Prepaid Expenses (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Other Accounts Payable And Accrued Expenses [Abstract]    
Government authorities $ 14,150 $ 13,789
Advances to suppliers 3,140 7,126
Prepaid expenses 16,636 12,358
Other 4,817 4,008
Other accounts receivable and prepaid expenses $ 38,743 $ 37,281