Oil and Natural Gas Properties - Schedule of Oil and Natural Gas Properties (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property Plant And Equipment [Abstract]
Well and development costs	$ 118,245	$ 71,463
Accumulated depletion	(20,204)	0
Total proved properties	98,041	71,463
Oil and natural gas leaseholds	651,295	738,852
Accumulated valuation allowance	(507,198)	(178,463)
Total oil and gas leasehold	144,097	560,389
Exploratory wells in process	836,747	1,727,181	$ 1,186,464	$ 777,823
Total unproved properties	980,844	2,287,570
Total oil and natural gas properties, net	$ 1,078,885	$ 2,359,033