Other Comprehensive Income Other Comprehensive Income (Loss) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Before-tax amount [Abstract]
Foreign currency translation adjustment	$ 28,702	$ 100,792
Net unrealized gain (loss) on derivative instruments designated as cash flow hedges	0	55
Net unrealized gain (loss) on a nonderivative net investment hedging instrument	0	(12,580)
Net hedging (gain) loss reclassified into net income (loss)	0	2,328
Pension plan benefits liability adjustment	19	(778)
Total other comprehensive income (loss), before tax	28,721	89,817
Tax (provision) benefit [Abstract]
Total other comprehensive income (loss), before tax	(161)	(345)
Total other comprehensive income (loss), before tax	0	5
Net unrealized gain (loss) on a nonderivative net investment hedging instrument	0	4,770
Net hedging (gain) loss reclassified into net income (loss)	0	(886)
Pension plan benefits liability adjustment	4	226
Total other comprehensive income (loss) tax (provision) benefit	(157)	3,770
Net-of-tax amount [Abstract]
Foreign currency translation adjustments	28,541	100,447
Net unrealized gain (loss) on derivative instruments, designated as cash flow hedges	0	60
Net unrealized gain (loss) on a nonderivative net investment hedging instrument	0	(7,810)
Net hedging (gain) loss reclassified into net income (loss)	0	1,442
Pension plan benefits liability adjustment	23	(552)
Total other comprehensive income (loss), net of tax	$ 28,564	$ 93,587