Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
REVENUE
Rental income	$ 220,476	$ 204,246	$ 441,057	$ 408,693
Other property income	3,692	3,068	7,759	5,258
Mortgage interest income	734	735	1,491	1,487
Total revenue	224,902	208,049	450,307	415,438
EXPENSES
Rental expenses	39,905	37,128	84,678	78,237
Real estate taxes	28,307	26,522	56,755	51,612
General and administrative	8,413	8,643	16,342	16,910
Depreciation and amortization	58,381	52,666	116,491	104,045
Total operating expenses	135,006	124,959	274,266	250,804
OPERATING INCOME	89,896	83,090	176,041	164,634
Other interest income	159	68	338	174
Interest expense	(27,766)	(23,907)	(53,950)	(47,665)
Loss from real estate partnerships	(728)	(114)	(1,253)	(114)
INCOME FROM CONTINUING OPERATIONS	61,561	59,137	121,176	117,029
Gain on sale of real estate, net	3,972	18,996	7,288	19,174
NET INCOME	65,533	78,133	128,464	136,203
Net income attributable to noncontrolling interests	(1,938)	(1,842)	(3,622)	(3,722)
NET INCOME ATTRIBUTABLE TO THE TRUST	63,595	76,291	124,842	132,481
Dividends on preferred shares	(2,011)	(135)	(4,021)	(271)
NET INCOME AVAILABLE FOR COMMON SHAREHOLDERS	$ 61,584	$ 76,156	$ 120,821	$ 132,210
EARNINGS PER COMMON SHARE, BASIC:
Net income available for common shareholders	$ 0.84	$ 1.05	$ 1.65	$ 1.83
Weighted average number of common shares	72,990	72,001	72,948	71,928
EARNINGS PER COMMON SHARE, DILUTED:
Net income available for common shareholders	$ 0.84	$ 1.05	$ 1.65	$ 1.83
Weighted average number of common shares	73,025	72,124	72,997	72,061
COMPREHENSIVE INCOME	$ 65,456	$ 78,526	$ 128,854	$ 137,680
COMPREHENSIVE INCOME ATTRIBUTABLE TO THE TRUST	$ 63,518	$ 76,684	$ 125,232	$ 133,958