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Compensation and Benefits - Components of expense (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value | $ 15,900 | $ 25,800 | $ 19,800
Salaries, incentive compensation and benefits | 358,339 | 360,287 | 341,060
Total salaries, incentive compensation and benefits | 400,456 | 413,166 | 390,202
Pre-offering related compensation - share-based awards | 0 | 0 | 12,678
Total compensation and benefits | 400,456 | 413,166 | 402,880
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount | $ 82,000 |  |
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition | 3 years 2 months 12 days |  |
Unvested restricted share-based awards |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Restricted share-based award compensation expense | $ 42,117 | $ 52,879 | $ 49,142

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- Definition The aggregate amount of expenditures for salaries, wages, profit sharing and incentive compensation, and other employee benefits, including equity-based compensation prior to any pre-offering related compensation. + References No definition available. + Details
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