CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
REVENUE
Rental (including reimbursable)	$ 1,484,818	$ 1,321,546	$ 1,212,306
Other	6,773	6,292	3,462
Total revenue	1,491,591	1,327,838	1,215,768
EXPENSES
Depreciation and amortization	593,961	539,780	498,788
Interest	290,991	266,020	247,413
General and administrative	66,483	84,148	58,446
Property (including reimbursable)	88,585	66,326	69,480
Income taxes	6,158	5,340	6,044
Provisions for impairment	40,186	26,269	14,751
Total expenses	1,086,364	987,883	894,922
Gain on sales of real estate	29,996	24,643	40,898
Foreign currency and derivative gains, net	2,255	0	0
Loss on extinguishment of debt	0	0	(42,426)
Net income	437,478	364,598	319,318
Net income attributable to noncontrolling interests	(996)	(984)	(520)
Net income attributable to the Company	436,482	363,614	318,798
Preferred stock dividends	0	0	(3,911)
Excess of redemption value over carrying value of preferred shares redeemed	0	0	(13,373)
Net income available to common stockholders	$ 436,482	$ 363,614	$ 301,514
Amounts available to common stockholders per common share:
Net income, basic and diluted (in dollars per share)	$ 1.38	$ 1.26	$ 1.10
Weighted average common shares outstanding:
Basic (in shares)	315,837,012	289,427,430	273,465,680
Diluted (in shares)	316,159,277	289,923,984	273,936,752
Other comprehensive income:
Net income available to common stockholders	$ 436,482	$ 363,614	$ 318,798
Foreign currency translation adjustment	186	0	0
Unrealized loss on derivatives, net	(9,190)	(8,098)	0
Comprehensive income available to common stockholders	$ 427,478	$ 355,516	$ 318,798