Annual report pursuant to Section 13 and 15(d)

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical)

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CONSOLIDATED STATEMENTS 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]      
Foreign currency translation adjustment, tax $ 283 $ (3,090) $ 0
Unrealized (loss) gain on derivatives, tax $ (1,161) $ 1,455 $ (1,222)