Quarterly report pursuant to Section 13 or 15(d)

Accumulated Other Comprehensive Income (Details)

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Accumulated Other Comprehensive Income (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Jun. 30, 2011
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]      
Unrealized holding gains (losses) on available-for-sale securities $ (34) $ (2) $ 154
Unrealized holding gains (losses) on derivative transactions 6,667 7,250 (6,737)
Foreign currency translation adjustments 35,945 39,649 69,558
Accumulated other comprehensive income $ 42,578 $ 46,897 $ 62,975