Consolidated Statements of Comprehensive Income (Loss) (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)	$ 7,174	$ (1,438)	$ (6,056)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	1,796	(628)	5,529
Realized gain on marketable securities	0	0	2
Defined benefit pension plan, net of tax:
Actuarial (loss) gain on benefit obligation and plan assets, net of tax benefit of $39, tax provision of $38 and tax benefit of $814 for the years ended December 31, 2012, 2011 and 2010, respectively	(352)	192	(3,402)
Amortization of deferred loss, net of tax benefit of $26 and $41 for the years ended December 31, 2012 and 2011, respectively	190	268	0
Amortization of prior service cost, net of tax benefit of $5, $7 and $7 for the years ended December 31, 2012, 2011 and 2010, respectively	39	39	32
Settlement, net of tax benefit of $30 for the year ended December 31, 2012	228	0	0
Other comprehensive income (loss), net of tax	1,901	(129)	2,161
Comprehensive income (loss)	$ 9,075	$ (1,567)	$ (3,895)