CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss	$ (14,817,000)	$ (7,615,000)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	97,139,000	92,193,000
Non-cash portion of interest expense	3,606,000	3,390,000
Amortization of stock-based compensation	5,236,000	5,329,000
Loss (income) from unconsolidated real estate entities	745,000	(303,000)
Unrealized gain on non-real estate investments	(839,000)	(1,650,000)
Straight-line rents	(10,711,000)	(14,899,000)
Straight-line rent expenses	1,268,000	422,000
Amortization of above- and below-market leases, net	(1,620,000)	(2,739,000)
Amortization of above- and below-market ground leases, net	688,000	668,000
Amortization of lease incentive costs	311,000	432,000
Distribution of income from unconsolidated real estate entities	0	393,000
Loss on derivatives	3,765,000	0
Impairment loss	0	20,503,000
Gain on sale of real estate	(7,046,000)	0
Change in operating assets and liabilities:
Accounts receivable	1,756,000	(4,133,000)
Deferred leasing costs and lease intangibles	(6,139,000)	(3,799,000)
Prepaid expenses and other assets	(3,537,000)	(10,068,000)
Accounts payable, accrued liabilities and other	15,294,000	21,964,000
Security deposits, prepaid rent and other	7,417,000	(4,634,000)
Net cash provided by operating activities	92,516,000	95,454,000
CASH FLOWS FROM INVESTING ACTIVITIES
Proceeds from sales of real estate	100,441,000	0
Additions to investment in real estate	(76,452,000)	(52,733,000)
Maturities of U.S. Government securities	0	2,156,000
Contributions to non-real estate investments	(901,000)	(10,534,000)
Proceeds from sales of non-real estate investments	503,000	0
Distributions from unconsolidated real estate entities	668,000	422,000
Contributions to unconsolidated real estate entities	(12,986,000)	(7,922,000)
Additions to non-real estate property, plant and equipment	(774,000)	(3,658,000)
Net cash provided by (used in) investing activities	10,499,000	(72,269,000)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from unsecured and secured debt	55,783,000	235,846,000
Payments of unsecured and secured debt	(212,000,000)	0
Payments of in-substance defeased debt	0	(918,000)
Transaction costs	0	(76,000)
Repurchases of common stock	(1,369,000)	0
Accelerated share repurchase	0	(200,000,000)
Dividends paid to common stock and unitholders	(36,665,000)	(36,942,000)
Dividends paid to preferred stock and unitholders	(5,200,000)	(7,724,000)
Contributions from redeemable non-controlling members in consolidated real estate entities	0	125,000
Distributions to redeemable non-controlling members in consolidated real estate entities	(3,248,000)	0
Contributions from non-controlling members in consolidated real estate entities	6,497,000	2,624,000
Distributions to non-controlling members in consolidated real estate entities	(9,559,000)	(15,215,000)
Payments to satisfy tax withholding obligations	(87,000)	0
Net cash used in financing activities	(205,848,000)	(22,280,000)
Net (decrease) increase in cash and cash equivalents and restricted cash	(102,833,000)	905,000
Cash and cash equivalents and restricted cash—beginning of period	285,731,000	196,876,000
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH—END OF PERIOD	$ 182,898,000	$ 197,781,000