Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenues:
Property rental	$ 258,128	$ 240,796	$ 506,014	$ 472,289
Tenant reinsurance	28,521	24,313	55,555	47,168
Management fees and other income	10,164	10,894	20,729	19,554
Total revenues	296,813	276,003	582,298	539,011
Expenses:
Property operations	73,083	67,295	145,836	133,940
Tenant reinsurance	5,471	3,804	11,078	7,724
General and administrative	21,651	21,865	43,115	40,673
Depreciation and amortization	51,892	46,632	103,641	96,064
Total expenses	152,097	139,596	303,670	278,401
Income from operations	144,716	136,407	278,628	260,610
Loss on real estate transactions and impairment of real estate	0	(6,019)	0	(6,019)
Interest expense	(43,347)	(37,456)	(84,313)	(73,426)
Non-cash interest expense related to amortization of discount on equity component of exchangeable senior notes	(1,176)	(1,290)	(2,385)	(2,559)
Interest income	1,188	1,485	2,626	3,800
Income before equity in earnings of unconsolidated real estate ventures and income tax expense	101,381	93,127	194,556	182,406
Equity in earnings of unconsolidated real estate ventures	3,429	3,838	7,026	7,417
Income tax expense	(2,097)	(2,867)	(3,439)	(5,991)
Net income	102,713	94,098	198,143	183,832
Net income allocated to Preferred Operating Partnership noncontrolling interests	(3,492)	(3,430)	(6,882)	(7,381)
Net income allocated to Operating Partnership and other noncontrolling interests	(4,068)	(3,662)	(7,852)	(7,163)
Net income attributable to common stockholders	$ 95,153	$ 87,006	$ 183,409	$ 169,288
Earnings per common share
Basic (in dollars per share)	$ 0.75	$ 0.69	$ 1.45	$ 1.34
Diluted (in dollars per share)	$ 0.75	$ 0.69	$ 1.45	$ 1.33
Weighted average number of shares
Basic (in shares)	125,874,130	125,673,156	125,823,581	125,639,480
Diluted (in shares)	132,772,772	132,783,402	132,992,734	132,759,354
Cash dividends paid per common share (in dollars per share)	$ 0.86	$ 0.78	$ 1.64	$ 1.56