Fair Value Measurements - Narrative (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023 USD ($) asset	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) property Property loan asset	Sep. 30, 2022 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Real estate impairment provision	$ 0	$ 10,697	$ 397,373	$ 86,254
Number of properties impaired | property			16
Assets evaluated using discounted cash flow analyses | asset	13		13
Assets evaluated using estimated selling price per share | asset	3		3
Number of mortgage loans (in loan) | loan			7
Office Joint Venture
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other than temporary impairment	$ 129,300		$ 129,334
Office
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Real estate impairment provision			$ 196,100
Number of properties impaired | Property			8
Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Real estate impairment provision			$ 201,200
Number of properties impaired | Property			8