CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
OPERATING ACTIVITIES:
Net income	$ 95,677	$ 80,872	$ 155,076
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	39,071	39,216	37,555
Stock-based compensation expense	7,012	6,566	5,870
Impairment charges	3,977	5,500
Gain on sale of real estate, net	(44,117)	(2,106)	(70,682)
Loss on unconsolidated joint ventures	758
Income from unconsolidated joint ventures	(432)	(2,388)	(2,864)
Income distributions from unconsolidated joint ventures	432	2,991	2,371
Insurance proceeds for damaged property			2,619
Payment for remediation of damaged property			(508)
Straight-line rental income	(1,778)	(4,487)	(9,550)
Adjustment for collectibility of rental income and lease incentives	23,214	1,926
Lease incentives funded	(220)	(387)	(1,272)
Amortization of lease incentives	426	385	2,092
(Recovery) provision for doubtful accounts	(3)	166	87
Non-cash interest related to contingent liabilities			377
Non-cash income related to earn-out and related lease incentive write-off			(3,074)
Other non-cash items, net	1,033	1,016	1,180
Increase in interest receivable	(6,161)	(5,854)	(5,682)
(Decrease) increase in accrued interest payable	(767)	803	(1,096)
Net change in other assets and liabilities	(2,021)	(1,750)	3,036
Net cash provided by operating activities	116,101	122,469	115,535
INVESTING ACTIVITIES:
Investment in real estate properties	(13,581)	(58,414)	(40,408)
Investment in real estate developments	(16,699)	(20,524)	(35,279)
Investment in real estate capital improvements	(6,913)	(2,839)	(3,249)
Capitalized interest	(354)	(608)	(1,248)
Proceeds from sale of real estate, net	72,141	14,009	92,749
Investment in real estate mortgage loans receivable	(4,253)	(12,342)	(21,364)
Principal payments received on mortgage loans receivable	1,065	1,065	2,136
Investments in unconsolidated joint ventures	(8,520)	(472)	(670)
Proceeds from liquidation of investments in unconsolidated joint ventures	17,848	6,601
Advances and originations under notes receivable	(2,078)	(8,967)	(124)
Principal payments received on notes receivable	5,275	3,503	3,848
Net cash provided by (used in) investing activities	43,931	(78,988)	(3,609)
FINANCING ACTIVITIES:
Bank borrowings	24,000	107,900	116,200
Repayment of bank borrowings	(28,000)	(126,000)	(100,700)
Proceeds from issuance of senior unsecured notes		100,000
Principal payments on senior unsecured notes	(40,160)	(33,667)	(38,166)
Stock repurchase plan	(18,012)
Proceeds from common stock issued			1,005
Stock option exercises		123	123
Distributions paid to stockholders	(90,262)	(90,899)	(90,372)
Contribution from non-controlling interests		965	3,963
Distributions paid to non-controlling interests	(463)	(309)	(65)
Financing costs paid	(35)	(61)	(3,162)
Withheld vested restricted stock and performance-based stock units	(3,564)	(2,047)	(1,193)
Other	(8)	(6)	(8)
Net cash used in financing activities	(156,504)	(44,001)	(112,375)
Increase (decrease) in cash, cash equivalents and restricted cash	3,528	(520)	(449)
Cash, cash equivalents and restricted cash, beginning of period	4,244	4,764	5,213
Cash, cash equivalents and restricted cash, end of period	7,772	4,244	4,764
Supplemental disclosure of cash flow information:
Interest paid	$ 29,443	$ 28,767	$ 30,116