Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Net loss	$ (6,848)	$ (9,341)
Other comprehensive income, net of tax:
Foreign currency translation adjustment	1,942	2,613
Defined benefit pension plan, net of tax:
Amortization of deferred loss, net of tax provision of $12 and $2 for the three months ended March 31, 2016 and 2015, respectively	48	9
Amortization of prior service cost, net of tax provision of $7 and $7 for the three months ended March 31, 2016 and 2015, respectively	30	28
Other comprehensive income, net of tax	2,020	2,650
Comprehensive loss	$ (4,828)	$ (6,691)