Fair Value Measurements - Financial Instrument Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Assets:
Derivative assets	$ 15,524	$ 21,170
Liabilities:
Derivative liabilities	158,024	119,620
Carrying value
Assets:
Loans receivable	622,600	205,300
Derivative assets	15,500	21,200
Total assets	638,100	226,500
Liabilities:
Mortgages payable	198,100	822,400
Notes and bonds payable	23,381,700	18,562,100
Derivative liabilities	158,000	119,600
Total liabilities	23,737,800	19,504,100
Fair value
Liabilities:
Mortgages payable	196,300	814,500
Notes and bonds payable	22,503,700	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	628,800	171,800
Derivative assets	15,500	21,200
Total assets	644,300	193,000
Liabilities:
Mortgages payable	0	0
Notes and bonds payable	21,480,600	16,620,800
Derivative liabilities	158,000	119,600
Total liabilities	21,638,600	16,740,400
Level 3 | Fair value
Assets:
Loans receivable	35,300	33,500
Derivative assets	0	0
Total assets	35,300	33,500
Liabilities:
Mortgages payable	196,300	814,500
Notes and bonds payable	1,023,100	982,900
Derivative liabilities	0	0
Total liabilities	$ 1,219,400	$ 1,797,400