Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Equity [Abstract]
Deferred income tax liability	$ 3,300		$ 3,600
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	6,661	$ 4,961
Unrealized gain reclassified and recognized in net loss, net of tax	(481)	(3)
Foreign exchange reclassified and recognized in net loss, net of tax	5	6
Total reclassified and recognized in net income or loss, net of tax	(476)	3
Unrealized gain (loss) on marketable securities, net of tax	(109)	43
Accumulated currency, net of tax	11	3
Total other comprehensive income (loss), net of tax	(574)	49
Accumulated other comprehensive income	$ 6,087	$ 5,010