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Stockholders' Equity - Summary of Basic and Diluted Earnings Per Share (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Net Income Loss Available To Trust Stock Net of Distributions $ 4,526 $ (2,949)
Less: Effect of contribution based profit - Holding Event 4,254 3,516
Income from discontinued operations, net of income tax $ 4,329 $ 7,815
Weighted Average Number of Shares Outstanding, Diluted 69,375 64,900
Net loss from continuing operations attributable to common shares of Holdings $ 272 $ (6,465)
Continuing operations (usd per share) $ 0.00 $ (0.10)
Discontinued operations (usd per share) 0.14 0.11
Earnings Per Share, Diluted $ 0.14 $ 0.01
Income from continuing operations $ 13,440 $ 11,179
Discontinued Operations, Disposed of by Sale [Member]    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Less: Effect of contribution based profit - Holding Event 630 538
Income from discontinued operations, net of income tax 9,692 7,277
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax $ 10,322 $ 7,815