CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
REVENUE
Rental (including reimbursable)	$ 1,639,533	$ 1,484,818	$ 1,321,546
Other	12,092	6,773	6,292
Total revenue	1,651,625	1,491,591	1,327,838
EXPENSES
Depreciation and amortization	677,038	593,961	539,780
Interest	309,336	290,991	266,020
Property (including reimbursable)	104,603	88,585	66,326
General and administrative	73,215	66,483	84,148
Income taxes	14,693	6,158	5,340
Provisions for impairment	147,232	40,186	26,269
Total expenses	1,326,117	1,086,364	987,883
Gain on sales of real estate	76,232	29,996	24,643
Foreign currency and derivative gains, net	4,585	2,255	0
Loss on extinguishment of debt	(9,819)	0	0
Net income	396,506	437,478	364,598
Net income attributable to noncontrolling interests	(1,020)	(996)	(984)
Net income available to common stockholders	$ 395,486	$ 436,482	$ 363,614
Amounts available to common stockholders per common share:
Net income per common share, basic (in dollars per share)	$ 1.15	$ 1.38	$ 1.26
Net income per common share, diluted (in dollars per share)	$ 1.14	$ 1.38	$ 1.26
Weighted average common shares outstanding:
Basic (in shares)	345,280,126	315,837,012	289,427,430
Diluted (in shares)	345,415,258	316,159,277	289,923,984
Other comprehensive income:
Net income available to common stockholders	$ 395,486	$ 436,482	$ 363,614
Foreign currency translation adjustment	(2,606)	186	0
Unrealized loss on derivatives, net	(34,926)	(9,190)	(8,098)
Comprehensive income available to common stockholders	$ 357,954	$ 427,478	$ 355,516