Income Taxes - Reconciliation of Taxes Computed at Corporate Federal Statutory Income Tax Rate (Details) - USD ($) $ in Thousands	3 Months Ended					12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Net loss before income taxes						$ (143,097)	$ (6,729)	$ (19,875)
Tax benefit computed at Federal statutory rate						(48,653)	(2,288)
Non-taxable Oak Valley income prior to merger							(4,142)
Deferred income tax arising from change in tax status of Oak Valley							28,347
Non-deductible general and administrative expenses						534
Return to accrual						(1,398)
State income taxes, net of Federal benefit						(743)	188
Valuation allowance						23,818
Total income tax (benefit) provision	$ (26,373)	$ 811	$ (295)	$ (585)	$ 22,105	$ (26,442)	$ 22,105
Effective tax rate						18.50%	(328.50%)