Accumulated Other Comprehensive Loss (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Changes in accumulated other comprehensive loss, net of tax
Balance at the beginning of period	$ 5,020
Other comprehensive income before reclassifications	(2,078)
Amounts reclassified from accumulated other comprehensive income	8
Net current-period other comprehensive income	(2,070)
Balance at the end of period	2,950
Foreign currency
Changes in accumulated other comprehensive loss, net of tax
Balance at the beginning of period	5,375
Other comprehensive income before reclassifications	(2,078)
Net current-period other comprehensive income	(2,078)
Balance at the end of period	3,297
Defined benefit pension plan
Changes in accumulated other comprehensive loss, net of tax
Balance at the beginning of period	(355)
Amounts reclassified from accumulated other comprehensive income	8
Net current-period other comprehensive income	8
Balance at the end of period	$ (347)