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Stockholders' Equity - Net Income (Loss) Attributable to Noncontrolling Interests and Noncontrolling Interests at the End of the Period (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Dec. 31, 2021
Change In Ownership Interest [Line Items] |  |  |  |  |
Net Income (Loss) Attributable to Noncontrolling Interests | $ (3,829) | $ 1,738 | $ 3,270 | $ 5,264 |
Noncontrolling interests | 111,295 |  | 111,295 |  | $ 102,744
Profits Interest Participation Rights [Member] |  |  |  |  |
Change In Ownership Interest [Line Items] |  |  |  |  |
Noncontrolling interests | 9,293 |  | 9,293 |  | 4,049
LFI Consolidated Funds [Member] |  |  |  |  |
Change In Ownership Interest [Line Items] |  |  |  |  |
Net Income (Loss) Attributable to Noncontrolling Interests | (10,405) | 2,420 | (13,156) | 4,688 |
Noncontrolling interests | 67,551 |  | 67,551 |  | 67,299
Edgewater [Member] |  |  |  |  |
Change In Ownership Interest [Line Items] |  |  |  |  |
Net Income (Loss) Attributable to Noncontrolling Interests | 3,518 | 1,874 | 10,506 | 3,330 |
Noncontrolling interests | 46,015 |  | 46,015 |  | 44,826
LGAC [Member] |  |  |  |  |
Change In Ownership Interest [Line Items] |  |  |  |  |
Net Income (Loss) Attributable to Noncontrolling Interests | 3,058 | (2,558) | 5,918 | (2,758) |
Noncontrolling interests | (11,576) |  | (11,576) |  | (13,445)
Other [Member] |  |  |  |  |
Change In Ownership Interest [Line Items] |  |  |  |  |
Net Income (Loss) Attributable to Noncontrolling Interests |  | $ 2 | 2 | $ 4 |
Noncontrolling interests | $ 12 |  | $ 12 |  | $ 15

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