Accumulated OCI (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Changes in accumulated OCI, net of tax [Roll Forward]
Other comprehensive income before reclassifications, net of tax		$ 723
Amounts reclassified from accumulated OCI, net of tax		159
Total other comprehensive income, net of tax	$ 4,502	882
Accumulated Other Comprehensive Income (Loss) [Member]
Changes in accumulated OCI, net of tax [Roll Forward]
Balance		(4,239)
Balance		(3,357)
Net Change in Fair Value of Interest Rate Swaps [Member]
Changes in accumulated OCI, net of tax [Roll Forward]
Balance		(239)
Other comprehensive income before reclassifications, net of tax		(74)
Amounts reclassified from accumulated OCI, net of tax		159
Total other comprehensive income, net of tax		85
Balance		(154)
Other comprehensive income (loss) before reclassifications, tax		(49)
Foreign Currency Translation Adjustments [Member]
Changes in accumulated OCI, net of tax [Roll Forward]
Balance	(4,502)	(4,000)
Other comprehensive income before reclassifications, net of tax	1,458	797
Amounts reclassified from accumulated OCI, net of tax	3,044	0
Total other comprehensive income, net of tax		797
Balance	0	(3,203)
Other comprehensive income (loss) before reclassifications, tax	225	$ 0
Amounts reclassified from accumulated OCI, tax	$ 0