Accounts Receivable, Accounts Payable and Accrued Expenses - Accounts Payable and Accrued Expenses (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accounts payable	$ 20,660	$ 11,210
Accrued capital expenditures	43,354	24,038
Revenues payable	5,539	3,815
Payable to Silverback	1,962	32,293
Accrued underwriting fees	0	7,719
Other	6,631	7,025
Accounts payable and accrued expenses	$ 78,146	$ 86,100