Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013
Changes in accumulated other comprehensive income, net of tax
Balance at the beginning of period	$ 5,020
Other comprehensive loss before reclassifications	(1,959)
Amounts reclassified from accumulated other comprehensive income	16
Net current-period other comprehensive loss	(1,943)
Balance at the end of period	3,077
Foreign currency
Changes in accumulated other comprehensive income, net of tax
Balance at the beginning of period	5,375
Other comprehensive loss before reclassifications	(1,959)
Net current-period other comprehensive loss	(1,959)
Balance at the end of period	3,416
Defined benefit pension plan
Changes in accumulated other comprehensive income, net of tax
Balance at the beginning of period	(355)
Amounts reclassified from accumulated other comprehensive income	16
Net current-period other comprehensive loss	16
Balance at the end of period	$ (339)