Condensed Consolidated Statements of Comprehensive Income Loss (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Statement of Comprehensive Income [Abstract]
Net income	$ 6,027	$ 5,228	$ 9,154	$ 4,307
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment	3,778	718	1,391	(176)
Defined benefit pension plan, net of tax:
Amortization of deferred loss, net of tax benefit of $7 and $8 for the three months ended September 30, 2013 and 2012, respectively; net of tax benefit of $21 and $24 for the nine months ended September 30, 2013 and 2012, respectively	38	45	114	138
Amortization of prior service cost, net of tax benefit of $1 for both the three months ended September 30, 2013 and 2012; net of tax benefit of $7 and $5 for the nine months ended September 30, 2013 and 2012	10	10	28	27
Other comprehensive income (loss), net of tax	3,826	773	1,533	(11)
Comprehensive income (loss)	$ 9,853	$ 6,001	$ 10,687	$ 4,296