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CONSOLIDATED STATMENT OF COMPREHENSIVE INCOME (Parenthetical) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Statement of Income and Comprehensive Income [Abstract]      
Reclssification of unrealized losses on cash flow hedges to net income, tax $ 208 $ 74 $ 75
Other comprehensive income (loss), available-for-sale securities, tax 0 (65) 4
Foreign currency translation adjustments, tax (7,677) (1,702) 3,541
Net change in fair value of cash flow hedges, tax $ (905) $ 1,334 $ 6,046