Condensed Consolidated Statements of Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 17,250	$ 5,426	$ 38,652	$ (29,265)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(8,993)	7,646	(7,860)	694
Actuarial (losses) gains related to defined benefit pension plans	(18)	80	(56)	49
Unrealized losses on investment arising during period	0	(158)	0	(254)
Reclassification adjustment from sale of investment	0	0	328	0
Total other comprehensive income (loss)	(9,011)	7,568	(7,588)	489
Total comprehensive income (loss)	$ 8,239	$ 12,994	$ 31,064	$ (28,776)