Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES:
Net earnings	$ 49,429	$ 30,817
Adjustments to reconcile net earnings to net cash flow provided by operating activities:
Depreciation and amortization expense	19,552	17,085
Impairment charges	1,429	1,532
Gain on dispositions of real estate	(7,302)	(7,478)
Deferred rent receivable	(1,582)	(1,514)
Amortization of above-market and below-market leases	9	(84)
Amortization of investment in direct financing leases	2,598	2,343
Amortization of debt issuance costs	468	518
Accretion expense	822	863
Stock-based compensation	2,316	1,937
Changes in assets and liabilities:
Accounts receivable	(180)	391
Prepaid expenses and other assets	(1,047)	(822)
Environmental remediation obligations	(19,867)	(3,032)
Accounts payable and accrued liabilities	(3,236)	(2,552)
Net cash flow provided by operating activities	43,409	40,004
CASH FLOWS FROM INVESTING ACTIVITIES:
Property acquisitions	(54,198)	(63,304)
Capital expenditures		(214)
Addition to construction in progress	(33)	(151)
Proceeds from dispositions of real estate	10,698	8,781
Deposits for property acquisitions		2,966
Issuance of notes and mortgages receivable	(4,825)	(11,083)
Collection of notes and mortgages receivable	721	911
Net cash flow used in investing activities	(47,637)	(62,094)
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings under credit agreement	15,000	30,000
Repayments under credit agreement	(75,000)	(37,500)
Proceeds from senior unsecured notes	100,000
Payment of debt issuance costs	(588)
Payment of finance lease obligations	(230)	(347)
Security deposits refunded	(47)	(165)
Payments of cash dividends	(39,055)	(34,986)
Payments in settlement of restricted stock units	(496)	(728)
Net cash flow provided by (used in) financing activities	(499)	(14,148)
Change in cash, cash equivalents and restricted cash	(4,727)	(36,238)
Cash, cash equivalents and restricted cash at beginning of period	26,461	57,054
Cash, cash equivalents and restricted cash at end of period	21,734	20,816
Supplemental disclosures of cash flow information Cash paid during the period for:
Interest	12,813	11,753
Income taxes	631	352
Environmental remediation obligations	2,333	1,994
Non-cash transactions:
Dividends declared but not yet paid	19,619	17,785
Issuance of notes and mortgages receivable related to property dispositions	1,050
ATM Program [Member]
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of common stock, net	$ (83)	$ 29,578