Commitments and Contingencies (Details) - USD ($) $ in Millions	12 Months Ended			25 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2016
Commitments and Contingencies (Details) [Line Items]
Rent expense	$ 0.8	$ 1.2	$ 1.2
Tax protection agreements, period (in years)				10 years
Terranomics Crossroads Associates, LP
Commitments and Contingencies (Details) [Line Items]
Ownership percentage (in percentage)			51.00%
Tax protection agreements, period (in years)	12 years
SARM Five Points LLC
Commitments and Contingencies (Details) [Line Items]
Ownership percentage (in percentage)			100.00%