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Stock-Based Compensation Plans and Employee Benefits (Performance Incentive Plans) (Details) $ / shares in Units, $ in Thousands | 12 Months Ended
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Dec. 31, 2021 USD ($) item plan $ / shares shares | Dec. 31, 2020 USD ($) $ / shares shares | Dec. 31, 2019 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting rights percentage | 15.00% |  |
Number of iPIP plans | plan | 5 |  |
Investment period of iPIP plans | 2 years |  |
Equity-based compensation | $ 69,261 | $ 39,354 | $ 30,436
Performance Incentive Plan |  |  |
Accrued expenses | $ 151,810 | 93,186 |
iPIP Plans |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 6 years |  |
Vesting rights percentage | 40.00% |  |
Performance Incentive Plan |  |  |
Accrued expenses | $ 116,600 | 69,100 |
2019-2022 Performance Incentive Plan |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of ownership classes of consolidated subsidiary | item | 2 |  |
Ownership percentage of class A units (as a percent) | 100.00% |  |
Equity-based compensation | $ 3,800 | $ 3,400 | 2,900
Settlement or distribution on units and awards, cash (as a percent) | 50.00% |  |
Settlement or distribution on units and awards, common stock (as a percent) | 50.00% |  |
2019-2020 Performance Incentive Plans |  |  |
Performance Incentive Plan |  |  |
Points at beginning of period (in shares) | 95.20 | 97.40 |
Forfeited (in shares) | (2.20) |  |
Points at end of period (in shares) | 97.40 |  |
Aggregate gross book value of investments | $ 1,100,000 |  |
2021-2022 Performance Incentive Plans |  |  |
Performance Incentive Plan |  |  |
Points at beginning of period (in shares) | 84.75 |  |
Granted (in shares) | 94.75 |  |
Forfeited (in shares) | (10.00) |  |
Aggregate gross book value of investments | $ 182,000 |  |
2013-2018 Performance Incentive Plans |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Equity-based compensation | $ 58,200 | $ 30,700 | 21,200
Settlement or distribution on units and awards, cash (as a percent) | 50.00% |  |
Settlement or distribution on units and awards, common stock (as a percent) | 50.00% |  |
2013-2014 Performance Incentive Plan |  |  |
Performance Incentive Plan |  |  |
Points at beginning of period (in shares) | 80.17 | 80.17 |
Granted (in shares) | 0 |  |
Points at end of period (in shares) | 80.17 |  |
Aggregate gross book value of investments | $ 387,000 |  |
iPIP distributions to plan participants |  |  | $ 7,400
iPIP distributions, equity component (in shares) | shares |  |  | 389,545
iPIP distributions, equity component, fair value (in dollars per share) | $ / shares |  |  | $ 9.21
iPIP distributions, shares issued net of tax withholdings (in shares) | shares |  |  | 209,118
2015-2016 Performance Incentive Plan |  |  |
Performance Incentive Plan |  |  |
Points at beginning of period (in shares) | 70.40 | 70.40 |
Granted (in shares) | 0 |  |
Points at end of period (in shares) | 70.40 |  |
Aggregate gross book value of investments | $ 396,000 |  |
iPIP distributions to plan participants | $ 10,700 | $ 1,500 | $ 9,400
iPIP distributions, equity component (in shares) | shares | 243,044 | 54,245 | 356,065
iPIP distributions, equity component, fair value (in dollars per share) | $ / shares | $ 22.66 | $ 14.51 | $ 13.11
iPIP distributions, shares issued net of tax withholdings (in shares) | shares | 131,757 | 32,825 | 192,829
2017-2018 Performance Incentive Plan |  |  |
Performance Incentive Plan |  |  |
Points at beginning of period (in shares) | 75.34 | 73.34 |
Granted (in shares) | 2.00 |  |
Points at end of period (in shares) | 73.34 |  |
Aggregate gross book value of investments | $ 453,000 |  |
Safehold Inc. |  |  |
Performance Incentive Plan |  |  |
Number of shares owned (in shares) | shares | 36,600,000 |  |
Safehold Inc. | 2019-2020 Performance Incentive Plans |  |  |
Performance Incentive Plan |  |  |
Number of shares owned (in shares) | shares | 26,700,000 |  |
Safehold Inc. | Common Stock | 2021-2022 Performance Incentive Plans |  |  |
Performance Incentive Plan |  |  |
Number of shares owned (in shares) | shares | 1,600,000 |  |
Safehold Inc. | Common Stock | 2017-2018 Performance Incentive Plan |  |  |
Performance Incentive Plan |  |  |
Number of shares owned (in shares) | shares | 7,600,000 |  |

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