Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Income tax benefit	$ (10,070)	$ (530)
Effective income tax rate (as a percent)	294.00%	11.00%
U.S. federal statutory rate (as a percent)	34.00%
State
Net operating losses			$ 75,900
Tax credit carryforwards			2,800
Federal
Net operating losses			78,100
Tax credit carryforwards			$ 6,700