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	$ 26,030	$ (65,718)	$ 23,234
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	123,439	147,229	122,580
Straight-line rents	(6,726)	(4,869)	(4,185)
Noncash lease expense	3,721	3,392	0
Net unrealized holding gains on investments	(51,925)	(72,391)	0
Distributions of operating income from unconsolidated affiliates	3,828	3,286	11,273
Equity in (earnings) losses of unconsolidated affiliates	(5,330)	3,057	(5,899)
Stock compensation expense	12,430	10,912	10,006
Amortization of financing costs	4,396	5,038	6,718
Impairment charges	9,925	85,598	1,721
Gain on disposition of properties	(10,521)	(683)	(30,324)
Allowance for credit loss	(2,796)	24,569	2,742
Termination of ground lease	(3,615)	0	0
Adjustments to straight-line rent reserves	2,682	21,871	1,961
Gain on debt extinguishment	0	(18,339)	0
Deferred gain on tax credits	0	0	(5,034)
Other, net	(5,304)	(8,155)	(11,575)
Changes in assets and liabilities:
Other liabilities	7,856	(3,959)	(4,850)
Lease liability - operating leases	(3,636)	(1,579)	2,014
Prepaid expenses and other assets	(7,427)	4	8,206
Rents receivable	7,384	(28,321)	1,089
Accounts payable and accrued expenses	572	3,005	1,705
Net cash provided by operating activities	104,983	103,947	131,382
CASH FLOWS FROM INVESTING ACTIVITIES
Acquisition of real estate	(161,846)	(21,208)	(319,673)
Acquisition of leasehold interests	0	0	(39,031)
Development, construction and property improvement costs	(40,671)	(36,579)	(89,385)
Proceeds from the disposition of properties, net	63,901	20,930	88,738
Investments in and advances to unconsolidated affiliates and other	(14,835)	(14,483)	(164,922)
Return of capital from unconsolidated affiliates and other	17,722	14,686	106,005
Issuance of notes receivable	(57,895)	(59,000)	(3,608)
Proceeds from notes receivable	0	0	15,250
Return of deposits for properties under contract	0	187	2,870
Payment of deferred leasing costs	(4,914)	(6,407)	(6,782)
Change in control of previously unconsolidated affiliate	0	950	0
Net cash used in investing activities	(198,538)	(100,924)	(410,538)
CASH FLOWS FROM FINANCING ACTIVITIES
Principal payments on mortgage and other notes	(98,602)	(51,949)	(158,211)
Principal payments on unsecured debt	(206,781)	(136,490)	(521,600)
Proceeds received on mortgage and other notes	56,847	5,351	324,995
Proceeds from unsecured debt	323,200	236,804	526,400
Payments of finance lease obligations	(63)	(903)	(2,749)
Proceeds from the sale (repurchase) of Common Shares	63,876	(22,386)	145,498
Capital contributions from noncontrolling interests	30,164	52,174	161,365
Distributions to noncontrolling interests	(30,410)	(31,461)	(101,364)
Dividends paid to Common Shareholders	(39,476)	(50,182)	(93,902)
Deferred financing and other costs	(7,436)	(2,215)	(6,476)
Net cash provided by financing activities	91,319	(1,257)	273,956
Increase (decrease) in cash and restricted cash	(2,236)	1,766	(5,200)
Cash of $14,149 and restricted cash of $13,880 beginning of period	29,795	28,029	33,229
Cash of $32,534 and restricted cash of $13,465 end of period	27,559	29,795	28,029
Supplemental disclosure of cash flow information
Cash paid during the period for interest, net of capitalized interest of $2,723 and $6,270 and $12,586 respectively	44,663	70,383	69,076
Cash paid for income taxes, net of (refunds)	147	(329)	730
Supplemental disclosure of non-cash investing and financing activities
Adjustment to equity as a result of the CECL implementation	0	400	0
Assumption of accounts payable and accrued expenses through acquisition of real estate	1,319	116	4,666
Note receivable exchanged for real estate	0	72,430	13,530
Acquisition of real estate through assumption of debt	31,801	0	0
Distribution declared and payable on October 15, 2021 and 2020, respectively	14,314	123	26,914
Right-of-use assets, finance leases (modified) obtained in exchange for finance lease liabilities	0	(70,427)	16,349
Right-of-use assets, finance leases obtained in exchange for assets under capital lease	0	0	76,965
Right-of-use assets, operating leases exchanged for operating lease liabilities	412	33,189	57,165
Capital lease obligation exchanged for finance lease liability	0	0	71,111
Other liabilities exchanged for operating lease liabilities	0	0	946
Assumption of debt through investments in unconsolidated affiliates	0	0	4,688
Debt exchanged for deferred gain on tax credits	0	0	(5,262)
Other assets exchanged for deferred gain on tax credits	0	0	228
Settlement of note receivable through cancellation of OP Units	479	0	0
Right of use assets, operating leases terminated in exchange for finance lease liabilities	0	(1,432)	0
Change in control of previously unconsolidated (consolidated) investment
Increase in real estate	0	(135,190)	828
Decrease in investments in and advances to unconsolidated affiliates	0	96,816	(1,189)
Change in other assets and liabilities	0	1,238	12
Acquisition of noncontrolling interest asset	0	(588)	0
Decrease in notes receivable	0	38,674	0
Decrease in right-of-use assets, finance leases	0	0	11,051
Decrease in finance lease liability	0	0	(10,702)
Increase in cash and restricted cash upon change of control	$ 0	$ 950	$ 0