Accumulated OCI (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Changes in accumulated OCI, net of tax [Roll Forward]
Other comprehensive income (loss) before reclassifications, net of tax	$ (569)	$ (2,405)
Amounts reclassified from accumulated OCI, net of tax	306	214
Total other comprehensive loss, net of tax	(263)	(2,191)	$ (1,641)
Accumulated Other Comprehensive Income (Loss) [Member]
Changes in accumulated OCI, net of tax [Roll Forward]
Accumulated OCI, net of tax beginning balance	(4,239)	(2,048)
Accumulated OCI, net of tax ending balance	(4,502)	(4,239)	(2,048)
Net Change in Fair Value of Interest Rate Swaps [Member]
Changes in accumulated OCI, net of tax [Roll Forward]
Accumulated OCI, net of tax beginning balance	(239)	(342)
Other comprehensive income (loss) before reclassifications, net of tax	(67)	(111)
Amounts reclassified from accumulated OCI, net of tax	306	214
Total other comprehensive loss, net of tax	239	103
Accumulated OCI, net of tax ending balance	0	(239)	(342)
Foreign Currency Translation Adjustments [Member]
Changes in accumulated OCI, net of tax [Roll Forward]
Accumulated OCI, net of tax beginning balance	(4,000)	(1,706)
Other comprehensive income (loss) before reclassifications, net of tax	(502)	(2,294)
Amounts reclassified from accumulated OCI, net of tax	0	0
Total other comprehensive loss, net of tax	(502)	(2,294)
Accumulated OCI, net of tax ending balance	$ (4,502)	$ (4,000)	$ (1,706)