CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
REVENUE
Total revenue	$ 1,327,838	$ 1,215,768	$ 1,103,172
EXPENSES
Depreciation and amortization	539,780	498,788	449,943
Interest	266,020	247,413	219,974
General and administrative	84,148	58,446	51,966
Property (including reimbursable)	66,326	69,480	62,865
Income taxes	5,340	6,044	3,262
Provisions for impairment	26,269	14,751	20,664
Total expenses	987,883	894,922	808,674
Gain on sales of real estate	24,643	40,898	21,979
Loss on extinguishment of debt	0	(42,426)	0
Net income	364,598	319,318	316,477
Net income attributable to noncontrolling interests	(984)	(520)	(906)
Net income attributable to the Company	363,614	318,798	315,571
Preferred stock dividends	0	(3,911)	(27,080)
Excess of redemption value over carrying value of preferred shares redeemed	0	(13,373)	0
Net income available to common stockholders	$ 363,614	$ 301,514	$ 288,491
Amounts available to common stockholders per common share:
Net income, basic and diluted (in dollars per share)	$ 1.26	$ 1.10	$ 1.13
Weighted average common shares outstanding:
Basic (in shares)	289,427,430	273,465,680	255,066,500
Diluted (in shares)	289,923,984	273,936,752	255,624,250
Other comprehensive income:
Net income attributable to the Company	$ 363,614	$ 318,798	$ 315,571
Change in fair value of interest rate swaps	(8,618)	0	0
Amortization of interest rate swaps	520	0	0
Comprehensive income attributable to the Company	355,516	318,798	315,571
Rental
REVENUE
Total revenue	1,274,596	1,166,224	1,057,413
Tenant reimbursements
REVENUE
Total revenue	46,950	46,082	43,104
Other
REVENUE
Total revenue	$ 6,292	$ 3,462	$ 2,655