Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues:
Property rental	$ 266,728	$ 248,589	$ 772,742	$ 720,878
Tenant reinsurance	30,105	25,882	85,660	73,050
Management fees and other income	10,120	9,685	30,849	29,239
Expenses:
Property operations	73,652	70,430	219,488	204,370
Tenant reinsurance	7,720	6,272	18,798	13,996
General and administrative	19,707	19,498	62,822	60,171
Depreciation and amortization	52,283	48,075	155,924	144,139
Total expenses	153,362	144,275	457,032	422,676
Income from operations	153,591	139,881	432,219	400,491
Gain (loss) on real estate transactions and impairment of real estate	30,807	0	30,807	(6,019)
Interest expense	(45,926)	(39,766)	(130,239)	(113,192)
Non-cash interest expense related to amortization of discount on equity component of exchangeable senior notes	(1,140)	(1,268)	(3,525)	(3,827)
Interest income	1,371	1,401	3,997	5,201
Income before equity in earnings of unconsolidated real estate ventures and income tax expense	138,703	100,248	333,259	282,654
Equity in earnings of unconsolidated real estate ventures	3,622	3,990	10,648	11,407
Income tax expense	(2,638)	(3,163)	(6,077)	(9,154)
Net income	139,687	101,075	337,830	284,907
Net income allocated to Preferred Operating Partnership noncontrolling interests	(3,723)	(3,394)	(10,605)	(10,775)
Net income allocated to Operating Partnership and other noncontrolling interests	(5,546)	(3,917)	(13,398)	(11,080)
Net income attributable to common stockholders	$ 130,418	$ 93,764	$ 313,827	$ 263,052
Earnings per common share
Basic (in dollars per share)	$ 1.03	$ 0.74	$ 2.49	$ 2.09
Diluted (in dollars per share)	$ 1.02	$ 0.74	$ 2.48	$ 2.07
Weighted average number of shares
Basic (in shares)	126,466,837	125,717,517	125,959,926	125,665,787
Diluted (in shares)	134,240,290	133,044,473	133,015,690	133,008,622
Cash dividends paid per common share (in dollars per share)	$ 0.86	$ 0.78	$ 2.5	$ 2.34
Real Estate
Revenues:
Total revenues	$ 306,953	$ 284,156	$ 889,251	$ 823,167