Accumulated Other Comprehensive Income (Loss), Net of Tax (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ (25,290)	$ (8,895)	$ 1,487
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Other comprehensive loss before reclassifications	(13,049)	(16,559)	(9,748)
Amounts reclassified from accumulated other comprehensive (income) loss	384	164	(634)
Net current-period other comprehensive loss	(12,665)	(16,395)	(10,382)
Ending Balance	(37,955)	(25,290)	(8,895)
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(24,988)	(10,088)	101
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Other comprehensive loss before reclassifications	(12,131)	(14,900)	(10,189)
Amounts reclassified from accumulated other comprehensive (income) loss	0	0	0
Net current-period other comprehensive loss	(12,131)	(14,900)	(10,189)
Ending Balance	(37,119)	(24,988)	(10,088)
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(302)	1,193	1,386
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Other comprehensive loss before reclassifications	(918)	(1,659)	441
Amounts reclassified from accumulated other comprehensive (income) loss	384	164	(634)
Net current-period other comprehensive loss	(534)	(1,495)	(193)
Ending Balance	$ (836)	$ (302)	$ 1,193