Accumulated Other Comprehensive Income (Loss) - Components of AOCI (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Other comprehensive income (loss)	$ 9,322	$ (512)	$ 54
Unrealized Gains (Losses) on Investments [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
AOCI, beginning of period	(149)	317
Other comprehensive income (loss) before adjustments	(2,570)	(355)
Amounts reclassified from AOCI	43	(111)
Other comprehensive income (loss)	(2,527)	(466)
AOCI, end of period	(2,676)	(149)	317
Unrealized Gains on Cash Flow Hedges [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
AOCI, beginning of period	0	0
Other comprehensive income (loss) before adjustments	11,840	0
Amounts reclassified from AOCI	(38)	0
Other comprehensive income (loss)	11,802	0
AOCI, end of period	11,802	0	0
Foreign Currency Translation Adjustments [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
AOCI, beginning of period	(49)	(3)
Other comprehensive income (loss) before adjustments	47	(46)
Amounts reclassified from AOCI	0	0
Other comprehensive income (loss)	47	(46)
AOCI, end of period	(2)	(49)	(3)
AOCI Including Portion Attributable to Noncontrolling Interest [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
AOCI, beginning of period	(198)	314
Other comprehensive income (loss) before adjustments	9,317	(401)
Amounts reclassified from AOCI	5	(111)
Other comprehensive income (loss)	9,322	(512)
AOCI, end of period	$ 9,124	$ (198)	$ 314