Income Taxes - Components of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current provision:
Federal	$ 654	$ 0	$ 0
State	1,098	156	60
Foreign	183	94	61
Total current	1,935	250	121
Deferred provision (benefit):
Federal	(34,835)	0	0
State	(5,576)	0	0
State	6	(19)	19
Total deferred	(40,405)	(19)	19
Total provision for (benefit from) income taxes	$ (38,470)	$ 231	$ 140