Stock-Based Compensation Plans and Employee Benefits (Performance Incentive Plans) (Details) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022 USD ($) shares	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) item plan $ / shares shares	Sep. 30, 2021 USD ($) $ / shares shares	Dec. 31, 2021 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting rights percentage			15.00%
Equity-based compensation	$ (374)	$ 3,001	$ (30,724)	$ 23,300
Performance Incentive Plan
Accrued expenses	70,428		$ 70,428		$ 151,810
iPIP Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			6 years
Vesting rights percentage			40.00%
Number of iPIP plans | plan			5
Investment period of iPIP plans			2 years
Performance Incentive Plan
Accrued expenses	$ 45,100		$ 45,100		$ 116,600
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			$ 3,500	2,600
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
Granted (in shares)			0
Forfeited (in shares)			0
Points at end of period (in shares)	95.20		95.20
Aggregate gross book value of investments	$ 764,000		$ 764,000
2021-2022 Performance Incentive Plans
Performance Incentive Plan
Points at beginning of period (in shares)			84.75
Granted (in shares)			7.95
Forfeited (in shares)			(0.95)
Points at end of period (in shares)	91.75		91.75
Aggregate gross book value of investments	$ 406,000		$ 406,000
2013-2018 Performance Incentive Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation			$ (39,000)	15,000
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
Granted (in shares)			0
Points at end of period (in shares)	80.17		80.17
Aggregate gross book value of investments	$ 13,000		$ 13,000
iPIP distributions to plan participants			$ 19,600
iPIP distributions, equity component (in shares) | shares			412,041
iPIP distributions, equity component, fair value (in dollars per share) | $ / shares			$ 16.06
iPIP distributions, shares issued net of tax withholdings (in shares) | shares			215,657
2015-2016 Performance Incentive Plan
Performance Incentive Plan
Points at beginning of period (in shares)			70.40
Granted (in shares)			0
Points at end of period (in shares)	70.40		70.40
Aggregate gross book value of investments	$ 0		$ 0
iPIP distributions to plan participants			$ 19,200	$ 3,200
iPIP distributions, equity component (in shares) | shares			402,731	97,881
iPIP distributions, equity component, fair value (in dollars per share) | $ / shares			$ 16.06	$ 17.65
iPIP distributions, shares issued net of tax withholdings (in shares) | shares			193,416	57,920
2017-2018 Performance Incentive Plan
Performance Incentive Plan
Points at beginning of period (in shares)			75.34
Granted (in shares)			0
Points at end of period (in shares)	75.34		75.34
Aggregate gross book value of investments	$ 236,000		$ 236,000
Safehold Inc.
Performance Incentive Plan
Number of shares owned (in shares) | shares	40,300,000		40,300,000
Safehold Inc. | Common Stock | 2019-2020 Performance Incentive Plans
Performance Incentive Plan
Number of shares owned (in shares) | shares	26,700,000		26,700,000
Safehold Inc. | Common Stock | 2021-2022 Performance Incentive Plans
Performance Incentive Plan
Number of shares owned (in shares) | shares	5,000,000.0		5,000,000.0
Safehold Inc. | Common Stock | 2017-2018 Performance Incentive Plan
Performance Incentive Plan
Number of shares owned (in shares) | shares	7,600,000		7,600,000