Subsequent Events - Additional Information (Details) - USD ($) $ in Millions		9 Months Ended
	Oct. 06, 2017	Sep. 30, 2017	Oct. 12, 2017
Subsequent Event [Line Items]
Bankruptcy claims, description of material contracts		On October 13, 2017, the funds were distributed according to the Bankruptcy Court’s October 6, 2017 order.
Court where petition was filed		United States Bankruptcy Court for the Southern District of Texas (the “Bankruptcy Court”)
Subsequent Event
Subsequent Event [Line Items]
Bankruptcy claims, amount paid to settle claims			$ 400.3
Bankruptcy claims, undistributed amount returned	$ 1.3
Date to release funds for claims	Oct. 06, 2017
Date, funds distributed for claims	Oct. 13, 2017