Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Rental Property:
Land	$ 444,489	$ 435,923
Buildings and improvements, net of accumulated depreciation of $446,361 and $387,633, respectively	3,141,970	3,087,435
Deferred leasing intangibles, net of accumulated amortization of $267,553 and $241,304, respectively	451,738	475,149
Total rental property, net	4,038,197	3,998,507
Cash and cash equivalents	102,097	9,041
Restricted cash	12,505	2,823
Tenant accounts receivable	65,122	57,592
Prepaid expenses and other assets	39,347	38,231
Interest rate swaps	0	303
Operating lease right-of-use assets	22,168	15,129
Assets held for sale, net	0	43,019
Total assets	4,279,436	4,164,645
Liabilities:
Unsecured credit facility	0	146,000
Unsecured term loans, net	970,282	871,375
Unsecured notes, net	573,082	572,883
Mortgage notes, net	52,827	54,755
Accounts payable, accrued expenses and other liabilities	58,783	53,737
Interest rate swaps	50,731	18,819
Tenant prepaid rent and security deposits	24,542	21,993
Dividends and distributions payable	18,301	17,465
Deferred leasing intangibles, net of accumulated amortization of $13,117 and $12,064, respectively	26,292	26,738
Operating lease liabilities	24,279	16,989
Total liabilities	1,799,119	1,800,754
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Common stock, par value $0.01 per share, 300,000,000 shares authorized at June 30, 2020 and December 31, 2019, respectively, 148,941,121 and 142,815,593 shares issued and outstanding at June 30, 2020 and December 31, 2019, respectively	1,489	1,428
Additional paid-in capital	3,148,163	2,970,553
Cumulative dividends in excess of earnings	(750,770)	(723,027)
Accumulated other comprehensive loss	(49,837)	(18,426)
Total stockholders’ equity	2,424,045	2,305,528
Noncontrolling interest	56,272	58,363
Total equity	2,480,317	2,363,891
Total liabilities and equity	4,279,436	4,164,645
Series C Preferred Stock
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Preferred stock	$ 75,000	$ 75,000