Stockholder's Equity - (Details)						1 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2017 shares	Jun. 09, 2017 USD ($) shares	Jun. 05, 2017 shares	May 31, 2017 USD ($) $ / shares shares	Oct. 06, 2016 class shares	May 31, 2017 $ / shares shares	Sep. 30, 2017 USD ($) shares	Dec. 31, 2016 shares
Common Stock
Number of classes of common stock | class					3
Proceeds, net of underwriting discounts and commissions | $		$ 16,000,000					$ 121,445,000
Class A common stock
Common Stock
Common stock, outstanding	30,227,061						30,227,061	18,935,916
Number of shares issued				4,000,000			4,600,000
Offering price (in dollars per share) | $ / shares				$ 27.75		$ 27.75
Proceeds, net of underwriting discounts and commissions | $				$ 106,600,000
Class A common stock | May 2017 Selling Stockholders
Common Stock
Offering price (in dollars per share) | $ / shares				$ 27.75		$ 27.75
Shares issued by selling stockholders		825,000		5,500,000		5,500,000
Class A common stock | CVRV Acquisition LLC
Common Stock
Shares of common stock redeemed for shares of common stock		648,462		4,323,083		4,323,083
Class A common stock | CVRV Acquisition II LLC
Common Stock
Shares sold that were previously held		176,538				1,176,917
Class A common stock | Over allotment
Common Stock
Number of shares issued		600,000	600,000
Class A common stock | Over allotment | May 2017 Selling Stockholders
Common Stock
Shares issued by selling stockholders			825,000
Class B common stock
Common Stock
Common stock, outstanding	57,031,184						57,031,184	62,002,729
Class B common stock | May 2017 Selling Stockholders
Common Stock
Consideration for redemption of shares | $		$ 0		$ 0
Class B common stock | CVRV Acquisition LLC
Common Stock
Number of common stock cancelled		648,462		4,323,083		4,323,083
Class C common stock
Common Stock
Common stock, outstanding	1						1	1
CWH BR Merger | Class A common stock
Common Stock
Shares issued in acquisition					7,063,716
CWH BR Merger | Class B common stock
Common Stock
Shares cancelled					7,063,716
CWGS, LLC
Common Stock
Purchase of newly-issued common units		600,000		4,000,000		4,000,000
CWGS, LLC | Class A common stock | CVRV Acquisition LLC
Common Stock
Redemption of common stock by selling shareholders				4,323,083
CWGS, LLC | Class B common stock | CVRV Acquisition LLC
Common Stock
Redemption of common stock by selling shareholders		648,462
CWGS, LLC | CWH BR Merger
Common Stock
Common stock, outstanding					7,063,716
CWH | CWGS, LLC
Common Stock
Units held	30,227,061						30,227,061	18,935,916
Ownership interest	34.10%				22.60%		34.10%	22.60%
Merged Entity | CWGS, LLC
Common Stock
Units held					7,063,716
Continuing Equity Owners | CWGS, LLC
Common Stock
Units held	58,309,304						58,309,304	64,835,914
Percentage of ownership	65.90%				77.40%		65.90%	77.40%