Other Comprehensive Income Other Comprehensive Income (Loss) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Before-tax amount [Abstract]
Foreign currency translation adjustment	$ (3,523)	$ (27,447)
Net unrealized gain (loss) on derivative instruments designated as cash flow hedges	(155)	(92)
Net hedging loss (gain) reclassified into net income	418	0
Pension plan benefits liability adjustment	139	(546)
Total other comprehensive income (loss), before tax	(3,121)	(28,085)
Tax (provision) benefit [Abstract]
Foreign currency translation adjustment	149	(3,848)
Net unrealized gain (loss) on derivative instruments designated as cash flow hedges	60	19
Net hedging loss (gain) reclassified into net income	(160)	0
Pension plan benefits liability adjustment	(42)	166
Total other comprehensive income (loss) tax (provision) benefit	7	(3,663)
Net-of-tax amount [Abstract]
Foreign currency translation adjustment	(3,374)	(31,295)
Net unrealized gain (loss) on derivative instruments designated as cash flow hedges	(95)	(73)
Net hedging loss (gain) reclassified into net income	258	0
Pension plan benefits liability adjustment	97	(380)
Total other comprehensive income (loss), net of tax	$ (3,114)	$ (31,748)