Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Changes in accumulated other comprehensive income, net of tax
Balance at the beginning of period	$ (1,431)
Other comprehensive income and pension reclassification	1,075	$ (991)
Balance at the end of period	(356)
Foreign currency
Changes in accumulated other comprehensive income, net of tax
Balance at the beginning of period	(744)
Other comprehensive income and pension reclassification	1,049
Balance at the end of period	305
Defined benefit pension plan
Changes in accumulated other comprehensive income, net of tax
Balance at the beginning of period	(687)
Other comprehensive income and pension reclassification	26
Balance at the end of period	$ (661)