Other Comprehensive Income Other Comprehensive Income (Loss) (Details) (USD $) In Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net income (loss)	$ 34,436	$ 25,311	$ 61,556	$ 50,561
Foreign currency translation adjustment, net	23,097	(115,021)	123,544	(212,499)
Net unrealized gain (loss) on derivative instruments, designated as cash flow hedges, net	(224)	(517)	(164)	(2,542)
Net unrealized gain (loss) on a nonderivative net investment hedging instrument, net	(1,452)	12,908	(9,262)	24,352
Net hedging (gain) loss reclassified into net income (loss), net	1,332	1,995	(2,774)	(4,197)
Pension plan benefits liability adjustment, net	24	(117)	(528)	(685)
Total comprehensive income (loss)	57,213	(75,441)	177,920	(136,616)
Income Tax (Provision) Benefit Related To OCI (Abstract)
Foreign currency translation adjustment	(67)	(72)	(412)	(585)
Net unrealized gain (loss) on derivative instruments designated as cash flow hedges	137	322	142	1,580
Net unrealized gain (loss) on a nonderivative net investment hedging instrument	891	(8,035)	5,661	(15,146)
Net hedging (gain) loss reclassified into net income (loss)	(817)	(1,243)	(1,703)	(2,613)
Pension plan benefits liability adjustment	(9)	38	217	221
Total income tax (provision) benefit on other comprehensive income (loss)	135	(8,990)	3,905	(16,543)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated other comprehensive income (loss), net of tax	$ 81,390		$ 81,390		$ (34,974)