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
Sep. 30, 2012
Dec. 31, 2011
Sep. 30, 2011
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]      
Unrealized holding losses on available-for-sale securities $ (2) $ (2) $ (2)
Unrealized holding gains on derivative transactions 3,298 7,250 5,091
Foreign currency translation adjustments 44,251 39,649 42,299
Accumulated other comprehensive income $ 47,547 $ 46,897 $ 47,388