Accounts Receivable, Accounts Payable and Accrued Expenses - Accounts Payable and Accrued Expenses (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accounts payable	$ 44,478	$ 11,210
Accrued capital expenditures	56,228	24,038
Revenues payable	9,922	3,815
Payable to Silverback	0	32,293
Accrued underwriting fees	0	7,719
Other	8,880	7,025
Accounts payable and accrued expenses	$ 119,508	$ 86,100