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	$ 12,366	$ 307,326	$ 34,529
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	178,105	188,283	210,005
Amortization of deferred financing costs	2,836	2,904	2,768
Amortization of debt discount/(premium), net	(1,951)	(568)	189
Amortization of stock compensation costs	7,130	6,627	6,876
Straight-line rent income	(13,485)	(14,743)	(11,369)
Amortization of acquired above (below) market leases, net	(5,377)	(4,867)	(8,857)
Ground rent expense	918	1,455	1,470
Provision for doubtful accounts	0	1,049	(1,345)
Net gain on real estate venture transactions	(2,973)	(75)	(11,639)
Net gain on sale of interests in real estate	(3,045)	(289,662)	(2,376)
Loss from unconsolidated real estate ventures, net of distributions	26,697	18,584	10,242
Income tax provision (benefit)	47	(224)	12
Changes in assets and liabilities:
Accounts receivable	2,506	(2,031)	(248)
Other assets	(19,325)	(5,034)	9,368
Accounts payable and accrued expenses	2,974	14,374	(5,599)
Deferred income, gains and rent	2,986	(12,149)	9,319
Other liabilities	465	14,557	(9,115)
Net cash provided by operating activities	190,874	225,806	234,230
Cash flows from investing activities:
Acquisition of properties	0	(41,950)	0
Acquisition of partners interest in consolidated real estate venture	0	0	(2,181)
Proceeds from the sale of properties	10,303	278,114	41,795
Proceeds from real estate venture sales	0	0	9,730
Proceeds from insurance	1,250	0	0
Proceeds from note receivable	50,000	0	0
Issuance of note receivable	0	(50,000)	0
Proceeds from repayment of mortgage notes receivable	0	0	3,341
Capital expenditures for tenant improvements	(56,830)	(73,166)	(67,258)
Capital expenditures for redevelopments	(48,022)	(21,664)	(53,846)
Capital expenditures for developments	(30,269)	(65,420)	(77,192)
Advances for the purchase of tenant assets, net of repayments	270	1,488	(1,035)
Investment in unconsolidated real estate ventures	(31,643)	(719)	(253)
Deposits for real estate	(2,550)	0	(4,181)
Capital distributions from unconsolidated real estate ventures	27,028	9,001	35,906
Leasing costs paid	(19,852)	(17,394)	(15,485)
Net cash provided by (used in) investing activities	(100,315)	18,290	(130,659)
Cash flows from financing activities:
Repayments of mortgage notes payable	0	(94,993)	(7,595)
Proceeds from credit facility borrowings	154,000	318,000	348,500
Repayments of Long-term Lines of Credit	(131,000)	(318,000)	(441,000)
Proceeds from unsecured notes	0	0	216,373
Payments of Financing Costs	0	0	(1,965)
Exercise of stock options, net	(63)	47	3,771
Payments On Account Of Employee Tax Withholdings On Share Based Awards	(1,762)	(1,346)	(1,554)
Partner contributions to consolidated real estate venture	2,765	0	27
Repurchase and retirement of common shares	0	(60,000)	(17,282)
Redemption of limited partnership units	(2,334)	0	0
Distributions paid to shareholders	(130,255)	(131,150)	(134,140)
Distributions to noncontrolling interest	(687)	(747)	(747)
Net cash used in financing activities	(109,336)	(288,189)	(35,612)
Increase/(Decrease) in cash and cash equivalents and restricted cash	(18,777)	(44,093)	67,959
Cash and cash equivalents and restricted cash at beginning of year	47,077	91,170	23,211
Cash and cash equivalents and restricted cash at end of period	28,300	47,077	91,170
Reconciliation of cash and cash equivalents and restricted cash:
Cash and cash equivalents, beginning of period	46,344	90,499	22,842
Restricted cash, beginning of period	733	671	369
Cash and cash equivalents, end of period	27,463	46,344	90,499
Restricted cash, end of period	837	733	671
Cash and cash equivalents and restricted cash	28,300	47,077	91,170
Supplemental disclosure:
Cash paid for interest, net of capitalized interest during the years ended December 31, 2021, 2020 and 2019 of $8,689, $4,650 and $2,246 respectively	72,391	79,498	66,508
Cash paid for income taxes	785	688	1,385
Supplemental disclosure of non-cash activity:
Dividends and distributions declared but not paid	32,765	32,706	33,815
Change in investment in real estate ventures as a result of deconsolidation	32,761	0	1,806
Change in operating real estate from deconsolidation of operating properties	30,073	(427,710)	0
Change in investment in real estate ventures from deconsolidation of operating properties	0	(296,262)	0
Change in mortgage notes payable from deconsolidation of operating properties	0	(220,271)	0
Change in other assets as a result of deconsolidation of operating properties	(2,688)	1,471	0
Change in capital expenditures financed through accounts payable at period end	22,744	(9,949)	(10,618)
Change in capital expenditures financed through retention payable at period end	$ (613)	$ 284	$ (946)