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Compensation - Compensation Expense Related to Class A Common Stock (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
LPU amortization | $ 36,708 | $ 11,359 | $ 1,194
RSU amortization | 7,465 | 5,212 | 4,576
Equity-based compensation and allocations of net income to limited partnership units and FPUs | 165,612 | 205,070 | 233,241
LPUs [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Issuance of common stock and exchangeability expenses | 100,948 | 150,147 | 176,463
Class A Common Stock [Member] | LPUs [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Issuance of common stock and exchangeability expenses | 100,948 | 150,147 | 176,463
Allocations of net income1 | 20,491 | 38,352 | 51,008
LPU amortization | 36,708 | 11,359 | 1,194
RSU amortization | 7,465 | 5,212 | 4,576
Equity-based compensation and allocations of net income to limited partnership units and FPUs | $ 165,612 | $ 205,070 | $ 233,241

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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=27012166&loc=d3e187171-122770 + Details
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