Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 87,254	$ 79,795	$ 55,516
Adjustments to reconcile net income to net cash provided by operating activities
Straight-line rents	(8,683)	(361)	(2,597)
Amortization of lease intangibles	(7,686)	(5,420)	(4,682)
Depreciation and amortization	50,687	45,875	44,015
Loss on extinguishment of debt	0	0	189
Gain on sales of real estate investments	(16,627)	(26,766)	(9,391)
Deferred financing cost amortization	1,335	1,391	1,562
Deferred senior secured loan fee amortization	0	(57)	(531)
Stock-based compensation	9,554	9,826	10,644
Changes in assets and liabilities
Other assets	(3,669)	(3,911)	(1,579)
Accounts payable and other liabilities	20,043	678	1,542
Net cash provided by operating activities	132,208	101,050	94,688
CASH FLOWS FROM INVESTING ACTIVITIES
Cash paid for property acquisitions	(644,956)	(98,088)	(238,661)
Proceeds from sales of real estate investments, net	41,082	70,685	47,133
Additions to construction in progress	(11,274)	(8,989)	(27,884)
Additions to buildings, improvements and leasing costs	(51,290)	(31,611)	(32,070)
Repayments on senior secured loan	0	15,915	0
Net cash used in investing activities	(666,438)	(52,088)	(251,482)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuance of common stock	462,386	64,767	278,058
Issuance costs on issuance of common stock	(5,683)	(940)	(4,023)
Repurchase of common stock related to employee awards	(582)	(9,837)	(3,959)
Borrowings on credit facility	75,000	0	17,000
Payments on credit facility	(75,000)	0	(36,000)
Payments on term loans payable	0	0	(50,000)
Borrowings on senior unsecured notes	275,000	0	100,000
Payments on mortgage loans payable	(11,271)	(33,077)	(1,514)
Payment of deferred financing costs	(4,027)	0	(943)
Dividends paid to common stockholders	(84,628)	(74,778)	(63,565)
Net cash provided by (used in) financing activities	631,195	(53,865)	235,054
Net increase (decrease) in cash and cash equivalents and restricted cash	96,965	(4,903)	78,260
Cash and cash equivalents and restricted cash at beginning of year	107,836	112,739	34,479
Cash and cash equivalents and restricted cash at end of year	204,801	107,836	112,739
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION
Cash paid for interest, net of capitalized interest	15,144	16,315	18,351
Supplemental disclosures of non-cash transactions
Accounts payable related to capital improvements	16,873	10,552	12,498
Non-cash issuance of common stock to the deferred compensation plan	(7,651)	(7,546)	0
Non-cash repayment of senior secured loan	0	0	(39,085)
Lease liability arising from recognition of right-of-use asset	3,287	0	647
Reconciliation of cash paid for property acquisitions
Acquisition of properties	681,970	100,391	250,506
Assumption of other assets and liabilities	(37,014)	(2,303)	(11,845)
Net cash paid for property acquisitions	$ 644,956	$ 98,088	$ 238,661