Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
REVENUE
Rental income	$ 162,383	$ 153,212	$ 328,576	$ 305,828
Other property income	4,325	2,913	7,725	6,181
Mortgage interest income	1,239	1,263	2,474	2,528
Total revenue	167,947	157,388	338,775	314,537
EXPENSES
Rental expenses	31,405	28,209	68,535	57,710
Real estate taxes	19,164	17,632	37,864	35,204
General and administrative	8,124	8,302	15,828	15,359
Depreciation and amortization	40,893	39,757	84,743	80,274
Total operating expenses	99,586	93,900	206,970	188,547
OPERATING INCOME	68,361	63,488	131,805	125,990
Other interest income	18	65	43	95
Interest expense	(23,213)	(27,147)	(46,350)	(54,552)
Early extinguishment of debt	0	(3,399)	0	(3,399)
Income from real estate partnership	250	372	463	684
INCOME FROM CONTINUING OPERATIONS	45,416	33,379	85,961	68,818
DISCONTINUED OPERATIONS
Discontinued operations - income	0	424	0	827
INCOME BEFORE GAIN ON SALE OF REAL ESTATE	45,416	33,803	85,961	69,645
Gain on sale of real estate	0	4,994	0	4,994
NET INCOME	45,416	38,797	85,961	74,639
Net income attributable to noncontrolling interests	(1,871)	(1,258)	(3,663)	(2,512)
NET INCOME ATTRIBUTABLE TO THE TRUST	43,545	37,539	82,298	72,127
Dividends on preferred shares	(135)	(135)	(271)	(271)
NET INCOME AVAILABLE FOR COMMON SHAREHOLDERS	43,410	37,404	82,027	71,856
EARNINGS PER COMMON SHARE, BASIC
Continuing operations	$ 0.64	$ 0.49	$ 1.22	$ 1.01
Discontinued operations	$ 0.00	$ 0.00	$ 0.00	$ 0.01
Gain on Sale of Real Estate	$ 0.00	$ 0.08	$ 0.00	$ 0.08
Earnings Per Share, Basic, Total	$ 0.64	$ 0.57	$ 1.22	$ 1.10
Weighted average number of common shares, basic	67,110	65,149	66,858	64,922
EARNINGS PER COMMON SHARE, DILUTED
Continuing operations	$ 0.64	$ 0.49	$ 1.22	$ 1.01
Discontinued operations	$ 0.00	$ 0.00	$ 0.00	$ 0.01
Gain on Sale of Real Estate	$ 0.00	$ 0.08	$ 0.00	$ 0.08
Earnings Per Share, Diluted, Total	$ 0.64	$ 0.57	$ 1.22	$ 1.10
Weighted average number of common shares, diluted	67,277	65,311	67,021	65,080
COMPREHENSIVE INCOME	43,316	47,202	83,318	84,659
COMPREHENSIVE INCOME ATTRIBUTABLE TO THE TRUST	$ 41,445	$ 45,944	$ 79,655	$ 82,147