Equity - Redemption of CW Units (Details) - $ / shares			1 Months Ended		12 Months Ended
	Mar. 20, 2019	Feb. 12, 2018	Mar. 31, 2019	Jul. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Feb. 07, 2018
Redemptions of CW Units
CW Units held by legacy CW Unit Holders					27,958,000	37,236,000	60,558,000
CW Unit redemptions					(804,000)	(7,000)
IPO
Redemptions of CW Units
CW Unit redemptions		(12,118,000)
July 2018 follow-on offering
Redemptions of CW Units
CW Unit redemptions				(11,197,000)
March 2019 Secondary Offering
Redemptions of CW Units
CW Unit redemptions	8,500,000		(8,474,000)
Class A Common Stock
Redemptions of CW Units
Redemption ratio, shares of common stock per unit redeemed					1
Common stock, par value					$ 0.01	$ 0.01
Class B Common Stock
Redemptions of CW Units
Common stock, par value					$ 0.01	$ 0.01