Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Statements Of Comprehensive Income (Parenthetical)

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Condensed Consolidated Statements Of Comprehensive Income (Parenthetical) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Statement of Income and Comprehensive Income [Abstract]        
Unrealized holding gains (losses) on available-for-sale securities, tax (expense) benefit $ (4) $ 92 $ 0 $ 23
Unrealized derivative holding gains (losses) arising during period, tax (expense) benefit 286 (1,561) 11 (512)
Reclassification to net income of previously deferred (gains) losses on derivative instruments, tax expense (benefit) 539 (812) 566 (1,142)
Foreign currency translation adjustment, tax (expense) benefit $ (149) $ 885 $ 111 $ (671)