CONSOLIDATED STATEMENTS OF CASH FLOW $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Cash flow from operating activities:
Net income (loss)	$ 14,576	$ 31,665	$ (7,175)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	193,242	160,528	143,354
Amortization of above and below market leases	429	187	465
Amortization of deferred loan costs	4,053	3,877	3,856
Distributions from unconsolidated entity	2,345	3,280	0
Equity in net loss of unconsolidated entity	2,044	1,473	0
Equity-based compensation expense	26,980	16,412	14,972
Bad debt expense (recoveries)	5,036	2,406	(2,275)
(Gain) loss on sale of real estate, net	0	(14,769)	6,994
Loss on extinguishment of debt	14,252	0	0
Write off of deferred loan costs	3,784	1,532	605
Deferred tax expense (benefit)	58	(348)	(2,970)
Integration, impairment & restructuring costs	1,484	11,462	19,575
Foreign currency remeasurement (income) loss	(159)	50	0
Changes in operating assets and liabilities
Rents and other receivables, net	(31,108)	(27,234)	(6,495)
Prepaid expenses	358	(3,406)	(3,063)
Due to/from affiliates, net	2,039	9,284	0
Other assets	(371)	35	4,518
Accounts payable and accrued liabilities	12,324	2,973	8,573
Advance rents, security deposits and other liabilities	2,267	(5,845)	2,069
Deferred income	46,082	5,928	8,270
Net cash provided by operating activities	299,715	199,490	191,273
Cash flow from investing activities:
Proceeds from sale of property, net	0	54,427	2,779
Acquisitions, net of cash acquired	(43,933)	(76,383)	(117,029)
Investments in unconsolidated entity	0	(4,144)	0
Additions to property and equipment	(773,812)	(361,160)	(484,303)
Net cash used in investing activities	(817,745)	(387,260)	(598,553)
Cash flow from financing activities:
Credit facility proceeds	827,582	399,028	483,000
Credit facility repayments	(759,000)	(334,000)	(362,000)
4.75% Senior Notes repayment	(400,000)	0	0
3.875% Senior Notes issuance	500,000	0	0
Term Loan D issuance	250,000	0	0
Payment of debt extinguishment costs	(14,252)	0	0
Payment of deferred financing costs	(9,559)	(5,130)	(3,964)
Payment of preferred stock dividends	(28,180)	(28,180)	(10,728)
Payment of common stock dividends	(111,311)	(94,085)	(82,579)
Distribution to noncontrolling interests	(12,330)	(11,533)	(10,759)
Proceeds from exercise of stock options	2,524	3,857	246
Payment of tax withholdings related to equity-based awards	(5,343)	(3,900)	(2,205)
Principal payments on finance lease obligations	(2,579)	(2,855)	(7,626)
Mortgage principal debt repayments	(1,736)	(65)	(66)
Preferred stock issuance proceeds, net of costs	0	0	407,477
Common stock issuance proceeds, net of costs	285,352	268,259	0
Net cash provided by financing activities	521,168	191,396	410,796
Effect of foreign currency exchange rates on cash and cash equivalents	3,984	268	0
Net change in cash and cash equivalents	7,122	3,894	3,516
Cash and cash equivalents, beginning of period	15,653	11,759	8,243
Cash and cash equivalents, end of period	22,775	15,653	11,759
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION
Cash paid for interest	54,596	56,023	51,380
Noncash investing and financing activities:
Accrued capital additions	121,194	92,206	76,890
Net increase (decrease) in other assets/liabilities related to change in fair value of derivative contracts	(27,113)	(28,952)	895
Equity received in unconsolidated entity in exchange for real estate assets	0	25,280	0
Increase in assets in exchange for finance lease obligation	0	45,024	0
Accrued equity issuance costs	0	30	115
Accrued preferred stock dividend	5,938	5,938	5,938
Accrued deferred financing costs	0	0	76
Acquisitions, net of cash acquired:
Land	0	1,743	0
Buildings, improvements and equipment	0	8,640	445
Construction in progress	43,933	61,514	114,283
Rents and other receivables, net	0	1,239	0
Acquired intangibles, net	0	2,628	2,301
Deferred costs	0	906	0
Prepaid expenses	0	359	0
Other assets	0	128	0
Accounts payable and accrued liabilities	0	(52)	0
Advance rents, security deposits and other liabilities	0	(722)	0
Total acquisitions, net of cash acquired	$ (43,933)	$ (76,383)	$ (117,029)