Income Taxes - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Operating Loss Carryforwards [Line Items]
Alternative minimum tax credits	$ 3,842,000	$ 23,629,000	$ 24,053,000
Foreign tax credit carryforwards	2,074,000	2,074,000	2,074,000
Valuation allowance of deferred tax assets	645,841,000	303,246,000	13,522,000
Change in deferred tax asset valuation	343,944,000	278,637,000	0
Impairment of oil and gas properties	715,495,000	1,440,418,000	0
Federal and state income taxes payable		$ 0	0
Diamondback
Operating Loss Carryforwards [Line Items]
Gain from sale of equity investment			203,300,000
Change in deferred tax asset valuation			79,400,000
Investment in Blackhawk Midstream LLC
Operating Loss Carryforwards [Line Items]
Gain from sale of equity investment			83,700,000
Change in deferred tax asset valuation			$ 32,300,000
Federal
Operating Loss Carryforwards [Line Items]
Net operating loss carryforward	463,100,000
State
Operating Loss Carryforwards [Line Items]
Net operating loss carryforward	$ 111,900,000