Annual report pursuant to Section 13 and 15(d)

Comprehensive Income (Summary Of Comprehensive Income, Net Of Related Tax Effects) (Details)

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Comprehensive Income (Summary Of Comprehensive Income, Net Of Related Tax Effects) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Comprehensive Income [Abstract]      
Net income $ 103,479 $ 77,037 $ 67,021
Unrealized holding gains (losses) on available-for-sale securities (38) (28) 64
Unrealized derivative holding gains (losses) arising during period (net of tax expense (benefit)) of $351, ($725) and ($1,054) in 2011, 2010 and 2009, respectively) 3,489 1,167 (3,024)
Reclassification to net income of previously deferred (gains) losses on derivative transactions (net of tax benefit of $1,507, $269 and $227 in 2011, 2010 and 2009, respectively) 5,432 (1,680) (616)
Foreign currency translation adjustments (8,701) 3,812 13,854
Other comprehensive income 182 3,271 10,278
Comprehensive income 103,661 80,308 77,299
Unrealized derivative holding gains (losses) arising during period, tax expense (benefit) 351 (725) (1,054)
Reclassification to net income of previously deferred gains on derivative transactions, tax benefit $ 1,507 $ 269 $ 227