Stockholder's Equity - Reorganization Transactions (Details) - shares		12 Months Ended
	Oct. 06, 2016	Dec. 31, 2017	Dec. 31, 2016	Nov. 10, 2016
Merged Entity | CWGS, LLC
Common Stock
Units held	7,063,716
CWH | CWGS, LLC
Common Stock
Units held		36,749,072	18,935,916
Ownership interest	22.60%	41.50%	22.60%
Continuing Equity Owners | CWGS, LLC
Common Stock
Units held		51,890,495	64,835,914
Percentage of ownership	77.40%	58.50%	77.40%
Class A common stock
Common Stock
Common stock, outstanding		36,749,072	18,935,916	18,935,916
Class A common stock | CWH BR Merger
Common Stock
Shares issued in acquisition	7,063,716
Common stock, outstanding				7,063,716
Class B common stock
Common Stock
Common stock, outstanding		50,836,629	62,002,729	62,002,729
Class B common stock | Merged Entity | CWH
Common Stock
Common stock, outstanding	7,063,716
Class B common stock | CWH BR Merger
Common Stock
Shares cancelled	7,063,716