Commitments and Contingencies - (Details) - lawsuit	1 Months Ended		5 Months Ended
	Jan. 31, 2016	Nov. 30, 2015	Jun. 30, 2016
Punitive Lawsuits Filed in the United States District Court for the Southern District of Texas [Member]
Loss Contingencies [Line Items]
Number of lawsuits filed (lawsuit)	1	4
Derivative Lawsuit Against Officers and Directors [Member]
Loss Contingencies [Line Items]
Number of lawsuits filed (lawsuit)	3
Derivative Lawsuit Filed in District Court of Harris County, Texas [Member]
Loss Contingencies [Line Items]
Number of lawsuits filed (lawsuit)	2		1