Fair Value Measurements - Financial Instrument Assets and Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Assets:
Derivative assets	$ 52,492	$ 21,170
Liabilities:
Derivative liabilities	105,809	119,620
Carrying value
Assets:
Loans receivable	253,400	205,300
Derivative assets	52,500	21,200
Total assets	305,900	226,500
Liabilities:
Mortgages payable	201,000	822,400
Notes and bonds payable	22,002,100	18,562,100
Derivative liabilities	105,800	119,600
Total liabilities	22,308,900	19,504,100
Fair value
Liabilities:
Mortgages payable	194,600	814,500
Notes and bonds payable	20,580,500	17,603,700
Level 1 | Fair value
Assets:
Loans receivable	0	0
Derivative assets	0	0
Total assets	0	0
Liabilities:
Mortgages payable	0	0
Notes and bonds payable	0	0
Derivative liabilities	0	0
Total liabilities	0	0
Level 2 | Fair value
Assets:
Loans receivable	190,700	171,800
Derivative assets	52,500	21,200
Total assets	243,200	193,000
Liabilities:
Mortgages payable	0	0
Notes and bonds payable	20,580,500	17,603,700
Derivative liabilities	105,800	119,600
Total liabilities	20,686,300	17,723,300
Level 3 | Fair value
Assets:
Loans receivable	67,300	33,500
Derivative assets	0	0
Total assets	67,300	33,500
Liabilities:
Mortgages payable	194,600	814,500
Notes and bonds payable	0	0
Derivative liabilities	0	0
Total liabilities	$ 194,600	$ 814,500