Condensed Consolidated Statements of Comprehensive Income Loss (Unaudited) (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)	$ (3,292)	$ 6,027	$ (4,154)	$ 9,154
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment	(7,119)	3,778	(6,487)	1,391
Defined benefit pension plan, net of tax:
Amortization of deferred loss, net of tax benefit of $7 for the three months ended September 30, 2013, net of tax benefit of $21 for the nine months ended September 30, 2013	0	38	0	114
Amortization of prior service cost, net of tax benefit of $7 and $1 for the three months ended September 30, 2014 and 2013, respectively; net of tax benefit of $21 and $7 for the nine months ended September 30, 2014 and 2013, respectively	28	10	86	28
Other comprehensive income (loss), net of tax	(7,091)	3,826	(6,401)	1,533
Comprehensive income (loss)	$ (10,383)	$ 9,853	$ (10,555)	$ 10,687