Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenues:
Property rental	$ 1,039,340	$ 967,229	$ 864,742
Tenant reinsurance	115,507	98,401	87,291
Management fees and other income	41,757	39,379	39,842
Total revenues	1,196,604	1,105,009	991,875
Expenses:
Property operations	291,695	271,974	250,005
Tenant reinsurance	25,707	19,173	15,555
Acquisition related costs and other	0	0	12,111
General and administrative	81,256	78,961	81,806
Depreciation and amortization	209,050	193,296	182,560
Total expenses	607,708	563,404	542,037
Gain on real estate transactions, earnout on prior acquisitions and impairment of real estate	30,807	112,789	8,465
Income from operations	619,703	654,394	458,303
Interest expense	(178,436)	(153,511)	(133,479)
Non-cash interest expense related to amortization of discount on equity component of exchangeable senior notes	(4,687)	(5,103)	(4,980)
Interest income	5,292	6,736	10,998
Income before equity in earnings of unconsolidated real estate ventures and income tax expense	441,872	502,516	330,842
Equity in earnings of unconsolidated real estate ventures	14,452	15,331	12,895
Equity in earnings of unconsolidated real estate ventures - gain on sale of real estate assets and purchase of joint venture partners' interests	0	0	69,199
Income tax expense	(9,244)	(3,625)	(15,847)
Net income	447,080	514,222	397,089
Net income allocated to Preferred Operating Partnership noncontrolling interests	(13,995)	(14,989)	(14,700)
Net income allocated to Operating Partnership and other noncontrolling interests	(17,796)	(20,220)	(16,262)
Net income attributable to common stockholders	$ 415,289	$ 479,013	$ 366,127
Earnings per common share
Basic (in dollars per share)	$ 3.29	$ 3.79	$ 2.92
Diluted (in dollars per share)	$ 3.27	$ 3.76	$ 2.91
Weighted average number of shares
Basic (in shares)	126,087,487	125,967,831	125,087,554
Diluted (in shares)	133,159,033	134,155,771	125,948,076