Other Comprehensive Income Other Comprehensive Income (Loss) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Before-tax amount [Abstract]
Foreign currency translation adjustment	$ 25,085	$ (80,794)	$ 940	$ 43,162
Net unrealized gain (loss) on derivative instruments designated as cash flow hedges	(1,332)	3,360	(2,697)	3,054
Net unrealized gain (loss) on a nonderivative net investment hedging instrument	0	645	0	(14,278)
Net hedging (gain) loss reclassified into net income (loss)	0	(277)	0	4,200
Pension plan benefits liability adjustment	(4)	32	34	(713)
Total other comprehensive income (loss), before tax	23,749	(77,034)	(1,723)	35,425
Tax (provision) benefit [Abstract]
Total other comprehensive income (loss), before tax	(558)	611	(243)	199
Total other comprehensive income (loss), before tax	504	(1,274)	1,020	(1,132)
Net unrealized gain (loss) on a nonderivative net investment hedging instrument	0	(237)	0	5,424
Net hedging (gain) loss reclassified into net income (loss)	0	101	0	(1,602)
Pension plan benefits liability adjustment	(1)	(10)	6	207
Total other comprehensive income (loss) tax (provision) benefit	(55)	(809)	783	3,096
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent	24,527	(80,183)	697	43,361
Net-of-tax amount [Abstract]
Foreign currency translation adjustments	24,596	(80,625)	806	43,432
Net unrealized gain (loss) on derivative instruments, designated as cash flow hedges	828	(2,086)	1,677	(1,922)
Net unrealized gain (loss) on a nonderivative net investment hedging instrument	0	408	0	(8,854)
Net hedging (gain) loss reclassified into net income	0	(176)	0	2,598
Pension plan benefits liability adjustment	5	(22)	(40)	506
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	23,694	(77,843)	(940)	38,521
Total other comprehensive income (loss), net of tax	$ 23,763	$ (78,285)	$ (831)	$ 38,592