Consolidated Statements Of Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
REVENUE
Rental Income	$ 948,842	$ 832,171	$ 932,738
Mortgage interest income	2,382	3,323	3,050
Total revenue	951,224	835,494	935,788
EXPENSES
Rental expenses	198,121	170,920	187,831
Real estate taxes	118,496	119,242	110,927
General and administrative	49,856	41,680	42,754
Depreciation and amortization	279,976	255,027	239,758
Total operating expenses	646,449	586,869	581,270
Impairment charge	0	(57,218)	0
Gain on sale of real estate and change in control of interest, net of tax	89,950	98,117	116,393
OPERATING INCOME	394,725	289,524	470,911
Other interest income	809	1,894	1,266
Interest expense	(127,698)	(136,289)	(109,623)
Early extinguishment of debt	0	(11,179)	0
Income (loss) from partnerships	1,245	(8,062)	(2,012)
Net income	269,081	135,888	360,542
Net income attributable to noncontrolling interests	(7,583)	(4,182)	(6,676)
NET INCOME ATTRIBUTABLE TO THE TRUST	261,498	131,706	353,866
Dividends on preferred shares	(8,042)	(8,042)	(8,042)
NET INCOME AVAILABLE FOR COMMON SHAREHOLDERS	$ 253,456	$ 123,664	$ 345,824
EARNINGS PER COMMON SHARE, BASIC
Net income available for common shareholders	$ 3.26	$ 1.62	$ 4.61
Weighted average number of common shares	77,336	75,515	74,766
EARNINGS PER COMMON SHARE, DILUTED
Net income available for common shareholders	$ 3.26	$ 1.62	$ 4.61
Weighted average number of common shares	77,368	75,515	74,766
COMPREHENSIVE INCOME
Net income	$ 269,081	$ 135,888	$ 360,542
Other comprehensive income (loss) - change in value of interest rate swaps	3,917	(5,302)	(397)
COMPREHENSIVE INCOME	272,998	130,586	360,145
Comprehensive income attributable to noncontrolling interests	(7,903)	(3,711)	(6,676)
COMPREHENSIVE INCOME ATTRIBUTABLE TO THE TRUST	$ 265,095	$ 126,875	$ 353,469