Accumulated Other Comprehensive Income Roll Forward (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss) Roll Forward [Line Items]
Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	$ 88		$ 2,449
Unrealized gain on available-for-sale investments, net of tax (benefit)	(2,417)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	3,415
Other Comprehensive Income Loss Arising During Period Total Net of Tax	998
Foreign currency translation adjustment, net of tax (benefit)	3,415	$ (15,237)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance	(29,124)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance	(28,070)
Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, Net of Tax	56
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment Realized upon Sale or Liquidation, Net of Tax	0
Other Comprehensive Income Loss Reclassification Adjustments Total Net of Tax	56
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	(2,361)	380
Other Comprehensive Income (Loss), Net of Tax	1,054	$ (14,857)
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	$ (28,158)		$ (31,573)