Consolidated Statements of Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (6,272)	$ 6,340	$ 7,174
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment	(10,445)	2,428	1,796
Defined benefit pension plan, net of tax:
Actuarial gain (loss) on benefit obligation and plan assets, net of tax benefit of $922, tax provision of $597 and tax benefit of $39 for the years ended December 31, 2014, 2013 and 2012, respectively	(2,358)	2,785	(352)
Amortization of deferred loss, net of tax benefit of $32 and $26 for the years ended December 31, 2013 and 2012, respectively	0	148	190
Amortization of prior service cost, net of tax benefit of $39, $8 and $5 for the years ended December 31, 2014, 2013 and 2012, respectively	101	36	39
Settlements and plan changes, net of tax provision of $118, tax benefit of $173 and tax provision of $30 for the years ended December 31, 2014, 2013 and 2012, respectively	302	(805)	228
Other comprehensive income (loss), net of tax	(12,400)	4,592	1,901
Comprehensive income (loss)	$ (18,672)	$ 10,932	$ 9,075