CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended				12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2020
OPERATING ACTIVITIES:
Net income	$ 13,850	$ 17,665	$ 1,952	$ 63,722
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	9,877			9,669
Stock-based compensation expense	1,852			1,777
Loss (gain) on sale of real estate, net	773			(43,854)
Income from unconsolidated joint ventures	(289)			(231)
Income distributions from unconsolidated joint ventures	164			231
Straight-line rental income	(682)			(839)
Adjustment for collectibility of rental income and lease incentives	758
Lease incentives funded				(13)
Amortization of lease incentives	112			101
(Recovery) provision for doubtful accounts	(9)			1
Other non-cash items, net	260			256
Increase in interest receivable	(1,745)			(1,511)
Decrease in accrued interest payable	(869)			(1,480)
Net change in other assets and liabilities	(2,793)			(3,975)
Net cash provided by operating activities	21,259			23,854
INVESTING ACTIVITIES:
Investment in real estate properties				(13,581)
Investment in real estate developments				(4,854)
Investment in real estate capital improvements	(1,044)			(1,119)
Capitalized interest				(191)
Proceeds from sale of real estate, net	1,765			71,905
Investment in real estate mortgage loans receivable	(158)			(366)
Principal payments received on mortgage loans receivable	125			65
Investments in unconsolidated joint ventures	(5,676)			(58)
Advances and originations under notes receivable	(1,656)			(141)
Principal payments received on notes receivable	2,553
Net cash (used in) provided by investing activities	(4,091)			51,660
FINANCING ACTIVITIES:
Bank borrowings	17,000			24,000
Repayment of bank borrowings				(28,000)
Principal payments on senior unsecured notes	(7,000)
Stock repurchase plan				(18,012)
Distributions paid to stockholders	(23,169)			(23,167)
Distributions paid to non-controlling interests	(88)			(146)
Cash paid for taxes in lieu of shares upon vesting of restricted stock and performance-based stock units	(3,470)			(3,545)
Other	(12)
Net cash used in financing activities	(16,739)			(48,870)
Increase in cash, cash equivalents and restricted cash	429			26,644
Cash, cash equivalents and restricted cash, beginning of period	7,772		$ 30,888	4,244	$ 4,244
Cash, cash equivalents and restricted cash, end of period	8,201	$ 7,772		30,888	$ 7,772
Supplemental disclosure of cash flow information:
Interest paid	7,582			8,935
Non-cash investing and financing transactions:
Reclassification of notes receivable to lease incentives				$ 300
Preferred return reserve related to investment in unconsolidated joint ventures	$ 2,324