Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenues:
Property rental	$ 967,229	$ 864,742	$ 676,138
Tenant reinsurance	98,401	87,291	71,971
Management fees and other income	39,379	39,842	34,161
Total revenues	1,105,009	991,875	782,270
Expenses:
Property operations	271,974	250,005	203,965
Tenant reinsurance	19,173	15,555	13,033
Acquisition related costs and other	0	12,111	69,401
General and administrative	78,961	81,806	67,758
Depreciation and amortization	193,296	182,560	133,457
Total expenses	563,404	542,037	487,614
Revenues less cost of operations	541,605	449,838	294,656
Gain (loss) on real estate transactions, earnout from prior acquisitions and impairment of real estate	112,789	8,465	1,501
Interest expense	(153,511)	(133,479)	(95,682)
Non-cash interest expense related to amortization of discount on equity component of exchangeable senior notes	(5,103)	(4,980)	(3,310)
Interest income	3,801	6,148	3,461
Interest income on note receivable from Preferred Operating Partnership unit holder	2,935	4,850	4,850
Income before equity in earnings of unconsolidated real estate ventures and income tax expense	502,516	330,842	205,476
Equity in earnings of unconsolidated real estate ventures	15,331	12,895	12,351
Equity in earnings of unconsolidated real estate ventures - gain on sale of real estate assets and purchase of joint venture partners' interests	0	69,199	2,857
Income tax expense	(3,625)	(15,847)	(11,148)
Net income	514,222	397,089	209,536
Net income allocated to Preferred Operating Partnership noncontrolling interests	(14,989)	(14,700)	(11,718)
Net income allocated to Operating Partnership and other noncontrolling interests	(20,220)	(16,262)	(8,344)
Net income attributable to common stockholders	$ 479,013	$ 366,127	$ 189,474
Earnings per common share
Basic (in dollars per share)	$ 3.79	$ 2.92	$ 1.58
Diluted (in dollars per share)	$ 3.76	$ 2.91	$ 1.56
Weighted average number of shares
Basic (in shares)	125,967,831	125,087,554	119,816,743
Diluted (in shares)	134,155,771	125,948,076	126,918,869