Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Income Tax Contingency [Line Items]
Income tax expense (benefit)	$ (3)	$ 8,011
Effective tax rate	0.00%	30.10%
Federal statutory rate	35.00%	35.00%
NOL carryforwards	$ 290,500
State NOL deferred tax asset	11,500
State tax credit carryover	4,300
Valuation allowance	48,800		$ 41,500
Federal Allowance
Income Tax Contingency [Line Items]
Valuation allowance	39,400		29,200
State Allowance
Income Tax Contingency [Line Items]
Valuation allowance	$ 9,400		$ 12,300