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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 |

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