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Compensation - Compensation Expense Related to Class A Common Stock (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
LPU amortization | $ 16,740 | $ 19,524 | $ 33,834 | $ 35,833
RSU amortization | 3,481 | 3,273 | 6,397 | 4,855
Equity-based compensation and allocations of net income to limited partnership units and FPUs | 58,290 | 27,819 | 91,785 | 70,023
LPUs |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Issuance of common stock and grants of exchangeability | 31,222 | 2,362 | 39,076 | 25,396
Class A Common Stock | LPUs |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Issuance of common stock and grants of exchangeability | 31,222 | 2,362 | 39,076 | 25,396
Allocation of net income | 6,846 | 2,660 | 12,477 | 3,939
LPU amortization | 16,741 | 19,524 | 33,835 | 35,833
RSU amortization | 3,481 | 3,273 | 6,397 | 4,855
Equity-based compensation and allocations of net income to limited partnership units and FPUs | $ 58,290 | $ 27,819 | $ 91,785 | $ 70,023

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- Definition Aggregate amount of net income allocated to limited partners. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187171-122770 + Details
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