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
Mar. 31, 2012
Dec. 31, 2011
Mar. 31, 2011
Accumulated Other Comprehensive Income [Abstract]      
Unrealized holding gains (losses) on available-for-sale securities $ (3) $ (2) $ 94
Unrealized holding gains (losses) on derivative transactions 5,373 7,250 (4,414)
Foreign currency translation adjustments 44,256 39,649 61,444
Accumulated other comprehensive income $ 49,626 $ 46,897 $ 57,124