Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flow from operating activities:
Net income	$ 235,959	$ 141,425
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	130,294	74,876
Impairment charges	272	(0)
Early extinguishment of debt charges	7,173	0
Equity award expense	7,513	6,457
Gain on sale of properties	(4,193)	(10,005)
Gain on marketable securities, net	(121,764)	(61,085)
Distributions from joint ventures and other investments	25,925	19,198
Change in accounts and notes receivable, net	990	18,593
Change in accounts payable and accrued expenses	(14,897)	15,387
Change in other operating assets and liabilities, net	(43,778)	(34,936)
Net cash flow provided by operating activities	194,551	148,371
Cash flow from investing activities:
Acquisition of operating real estate	(18,671)	(84,312)
Improvements to operating real estate	(29,435)	(20,569)
Investment in marketable securities	(1,469)	0
Proceeds from sale of marketable securities	100	50
Investment in cost method investment	(3,000)	0
Investments in and advances to real estate joint ventures	(13,116)	(1,805)
Reimbursements of investments in and advances to real estate joint ventures	8,569	967
Investments in and advances to other investments	(8,445)	(419)
Reimbursements of investments in and advances to other investments	24,398	343
Investment in other financing receivable	(3,000)	(397)
Collection of mortgage loans receivable	43	37
Proceeds from sale of properties	8,410	22,181
Net cash flow used for investing activities	(35,616)	(83,924)
Cash flow from financing activities:
Principal payments on debt, excluding normal amortization of rental property debt	(85,683)	(12,272)
Principal payments on rental property debt	(2,600)	(2,661)
Proceeds from mortgage loan financings	19,000	0
Financing origination costs	(10,165)	0
Payment of early extinguishment of debt charges	(6,470)	0
Contributions from noncontrolling interests	891	0
Redemption/distribution of noncontrolling interests	(4,673)	(539)
Dividends paid	(123,758)	(80,039)
Proceeds from issuance of stock, net	2,568	160
Shares repurchased for employee tax withholding on equity awards	(13,428)	(9,082)
Change in tenants' security deposits	1,038	650
Net cash flow used for financing activities	(123,280)	(103,783)
Net change in cash, cash equivalents and restricted cash	35,655	(39,336)
Cash, cash equivalents and restricted cash, beginning of the period	334,663	293,188
Cash, cash equivalents and restricted cash, end of the period	370,318	253,852
Interest paid during the period including payment of early extinguishment of debt charges of $6,470 and $0, respectively (net of capitalized interest of $102 and $296, respectively)	60,213	29,383
Senior Unsecured Notes [Member]
Cash flow from financing activities:
Proceeds from issuance of unsecured debt	600,000	0
Repayments of unsecured notes	(500,000)	0
Joint Ventures [Member]
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in income, net	(23,570)	(17,752)
Other Real Estate Investments [Member]
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in income, net	$ (5,373)	$ (3,787)