Accumulated OCI (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Changes in accumulated OCI, net of tax [Roll Forward]
Balance	$ 189,298
Total other comprehensive income, net of tax	111	$ 1,046
Balance	213,972
Accumulated Other Comprehensive Income (Loss) [Member]
Changes in accumulated OCI, net of tax [Roll Forward]
Balance		(4,239)
Other comprehensive income (loss) before reclassifications, net of tax		966
Amounts reclassified from accumulated OCI, net of tax		80
Total other comprehensive income, net of tax		1,046
Balance		(3,193)
Net Change in Fair Value of Interest Rate Swaps [Member]
Changes in accumulated OCI, net of tax [Roll Forward]
Balance		(239)
Other comprehensive income (loss) before reclassifications, net of tax		(56)
Amounts reclassified from accumulated OCI, net of tax		80
Total other comprehensive income, net of tax		24
Balance		(215)
Other comprehensive income (loss) before reclassifications, tax		37
Foreign Currency Translation Adjustments [Member]
Changes in accumulated OCI, net of tax [Roll Forward]
Balance	(4,502)	(4,000)
Other comprehensive income (loss) before reclassifications, net of tax	111	1,022
Amounts reclassified from accumulated OCI, net of tax		0
Total other comprehensive income, net of tax		1,022
Balance	(4,391)	(2,978)
Other comprehensive income (loss) before reclassifications, tax	$ 36	$ 0