CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities:
Net income (loss)	$ 16,163	$ (245,462)	$ 102,554
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Loss on extinguishment of debt	1,007	0	351
Loss on remeasurement of assets	0	163,298	0
(Gain) loss on sale or write down of assets, net	(75,740)	68,112	11,909
Depreciation and amortization	324,403	326,058	337,667
Amortization of net premium on mortgage notes payable	0	(773)	(929)
Amortization of share and unit-based plans	14,273	13,843	12,032
Straight-line rent and amortization of above and below market leases	(7,691)	(23,707)	(14,009)
(Recovery of) provision for doubtful accounts	(6,390)	44,250	7,682
Income tax expense (benefit)	6,948	(447)	1,589
Equity in (income) loss of unconsolidated joint ventures	(15,689)	27,038	(48,508)
Change in fair value of financing arrangement obligation	(15,390)	(139,522)	(76,640)
Distributions of income from unconsolidated joint ventures	48	0	934
Changes in assets and liabilities, net of acquisitions and dispositions:
Tenant and other receivables	62,421	(105,947)	(9,929)
Other assets	14,876	810	(9,553)
Due to/from affiliates	1,939	3,385	13,894
Accounts payable and accrued expenses	(6,746)	15,479	(237)
Other accrued liabilities	(28,064)	(21,578)	26,350
Net cash provided by operating activities	286,368	124,837	355,157
Cash flows from investing activities:
Development, redevelopment, expansion and renovation of properties	(77,686)	(45,161)	(166,791)
Property improvements	(30,521)	(23,143)	(21,114)
Proceeds from collection of notes receivable	1,300	0	68,819
Deferred leasing costs	(2,720)	(3,212)	(11,906)
Distributions from unconsolidated joint ventures	93,927	78,427	266,349
Contributions to unconsolidated joint ventures	(86,846)	(132,466)	(252,903)
Cash and restricted cash acquired from acquisition of previously unconsolidated joint venture	0	5,811	0
Loan to previously unconsolidated joint venture	0	(100,000)	0
Proceeds from sale of assets	337,514	16,896	5,520
Net cash provided by (used in) investing activities	234,968	(202,848)	(112,026)
Cash flows from financing activities:
Proceeds from mortgages, bank and other notes payable	520,000	660,000	1,796,000
Payments on mortgages, bank and other notes payable	(2,020,395)	(33,972)	(1,567,089)
Deferred financing costs	(22,872)	(4,320)	(7,759)
Payment on finance arrangement obligation	0	0	(27,945)
Proceeds from finance lease	0	4,115	0
Payments on finance leases	(1,849)	(1,534)	(1,472)
Proceeds from share and unit-based plans	1,348	1,531	1,519
Proceeds from stock offerings, net	830,241	0	0
Redemption of noncontrolling interests	(178)	(29)	(67)
Contributions from noncontrolling interests	128	525	3,131
Dividends and distributions	(143,447)	(179,862)	(474,534)
Net cash (used in) provided by financing activities	(837,024)	446,454	(278,216)
Net (decrease) increase in cash, cash equivalents and restricted cash	(315,688)	368,443	(35,085)
Cash and cash equivalents and restricted cash at beginning of year	482,659	114,216	149,301
Cash and cash equivalents and restricted cash at end of year	166,971	482,659	114,216
Supplemental cash flow information:
Cash payments for interest, net of amounts capitalized	204,221	199,147	210,026
Non-cash investing and financing activities:
Accrued development costs included in accounts payable and accrued expenses and other accrued liabilities	18,279	29,376	32,452
Conversion of Operating Partnership Units to common stock	48,807	12,086	1,005
Receivable in connection with sale of joint venture property	21,000	0	0
Lease liabilities recorded in connection with right-of-use assets	0	0	109,299
Joint venture
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Equity in (income) loss of unconsolidated joint ventures	(15,689)
Non-cash investing and financing activities:
Assets acquired from previously unconsolidated joint venture	0	395,844	0
Liabilities assumed from previously unconsolidated joint venture	0	263,393	0
Property distribution from unconsolidated joint venture	$ 0	$ 19,300	$ 0