Annual report pursuant to Section 13 and 15(d)

Accumulated Other Comprehensive Income (Accumulated Other Comprehensive Income, Net of Related Tax Effects) (Details)

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Accumulated Other Comprehensive Income (Accumulated Other Comprehensive Income, Net of Related Tax Effects) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]      
Unrealized holding gains (losses) on available-for-sale securities $ (9) $ (2) $ 36
Unrealized holding gains (losses) on derivative transactions 2,505 7,250 (1,671)
Foreign currency translation adjustments 44,167 39,649 48,350
Accumulated other comprehensive income $ 46,663 $ 46,897 $ 46,715