Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Statement of Other Comprehensive Income [Abstract]
Net income (loss)	$ 29,962	$ 24,505	$ (42,834)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment	2,791	(2,240)	3,413
Pension liability, net of tax of $80 in 2012, $339 in 2011 and $0 in 2010	558	(630)	(26)
Other Comprehensive Income (Loss), Net of Tax	3,349	(2,870)	3,387
Comprehensive income (loss)	33,311	21,635	(39,447)
Tax on pension liability	$ 80	$ 339	$ 0