Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash flows from operating activities:
Net income	$ 370,867	$ 488,035	$ 366,288
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	352,282	319,697	303,331
Amortization of deferred loan costs and debt premiums	8,252	5,799	6,003
Accretion of above and below market lease intangibles, net	(29,130)	(20,995)	(22,936)
Stock-based compensation, net of capitalization	20,075	16,521	12,515
Equity in income of investments in real estate partnerships	(50,541)	(59,824)	(47,086)
Gain on sale of real estate, net of tax	(661)	(109,005)	(91,119)
Provision for impairment of real estate, net of tax			84,389
Early extinguishment of debt	(99)
Distribution of earnings from investments in real estate partnerships	66,531	61,416	71,934
Settlement of derivative instruments			(2,472)
Deferred compensation expense (income)	4,782	(6,128)	4,572
Realized and unrealized (gain) loss on investments	(5,571)	7,040	(5,348)
Changes in assets and liabilities:
Tenant and other receivables	(13,904)	(35,274)	(24,869)
Deferred leasing costs	(11,156)	(10,801)	(6,966)
Other assets	3,028	1,292	(1,226)
Accounts payable and other liabilities	5,152	(9,088)	6,677
Tenants’ security, escrow deposits and prepaid rent	(316)	7,130	5,701
Net cash provided by operating activities	719,591	655,815	659,388
Cash flows from investing activities:
Acquisition of operating real estate, net of cash acquired of $0, $3,061 and $2,991 in 2023, 2022 and 2021, respectively	(45,386)	(169,639)	(392,051)
Acquisition of UBP, net of cash acquired of $14,143	(82,389)
Real estate development and capital improvements	(232,855)	(195,418)	(177,631)
Proceeds from sale of real estate	11,167	143,133	206,193
Issuance of notes receivable	(4,000)		(20)
Collection of notes receivable	4,000	1,823
Investments in real estate partnerships	(13,119)	(36,266)	(23,476)
Return of capital from investments in real estate partnerships	11,308	48,473	99,945
Dividends on investment securities	1,283	1,113	813
Acquisition of investment securities	(7,990)	(21,112)	(23,971)
Proceeds from sale of investment securities	16,003	21,785	23,846
Net cash used in investing activities	(341,978)	(206,108)	(286,352)
Cash flows from financing activities:
Net proceeds from common stock issuance	(33)	61,284	82,510
Repurchase of common shares in conjunction with equity award plans	(7,662)	(6,447)	(4,083)
Common shares repurchased through share repurchase program	(20,006)	(75,419)
Proceeds from sale of treasury stock	103	64	96
Contributions from limited partners in consolidated partnerships	10,238
Distributions to limited partners in consolidated partnerships	(7,813)	(7,245)	(4,345)
Distributions to exchangeable operating partnership unit holders	(2,368)	(1,867)	(1,815)
Redemption of exchangeable operating partnership units	(9,163)
Dividends paid to common stockholders	(453,065)	(428,276)	(403,085)
Dividends paid to preferred shareholders	(3,413)
Proceeds from unsecured credit facilities	557,000	95,000
Repayment of unsecured credit facilities	(405,000)	(95,000)	(265,000)
Proceeds from notes payable	59,500
Repayment of notes payable	(61,592)	(6,745)	(42,014)
Scheduled principal payments	(11,235)	(11,219)	(11,255)
Payment of loan costs	(526)	(88)	(7,468)
Net cash used in financing activities	(355,035)	(475,958)	(656,459)
Net change in cash, cash equivalents, and restricted cash	22,578	(26,251)	(283,423)
Cash, cash equivalents, and restricted cash at beginning of the year	68,776	95,027	378,450
Cash, cash equivalents, and restricted cash at end of the year	91,354	68,776	95,027
Supplemental disclosure of cash flow information:
Cash paid for interest (net of capitalized interest of $5,695, $4,166, and $4,202 in 2023, 2022, and 2021, respectively)	147,176	141,359	140,084
Cash paid for income taxes, net of refunds	933	570	378
Supplemental disclosure of non-cash transactions:
Common and Preferred stock, and exchangeable operating partnership dividends declared but not paid	126,683	111,709	107,480
Previously held equity investments in real estate assets acquired		17,179	(4,609)
Mortgage loans assumed by Company with the acquisition of real estate	98	22,779	111,104
Right of use assets obtained in exchange for new operating lease liabilities	36,577
Sale of leased asset in exchange for net investment in sales-type lease	8,510
Common stock issued for partnership units exchanged	199	1,275	99
Issuance of exchangeable operating partnership units	31,253
Real estate received in lieu of promote interest			13,589
Change in accrued capital expenditures	8,877	4,888	10,188
Common stock issued under dividend reinvestment plan	622	524	1,286
Stock-based compensation capitalized	954	735	666
Contributions to investments in real estate partnerships	920
Contributions from limited partners in consolidated partnerships, net		5,436
Reallocation of equity upon acquisition of a limited partner's interest in a consolidated partnership		6,266
Common stock issued for dividend reinvestment in trust	1,193	1,126	1,084
Contribution of stock awards into trust	2,080	2,250	1,416
Distribution of stock held in trust	2,245	786	3,647
Change in fair value of securities	338	1,658	513
UBP Acquisition [Member]
Supplemental disclosure of non-cash transactions:
Notes payable assumed in acquisition, at fair value	284,706
Noncontrolling interest assumed in acquisition, at fair value	64,492
Common Stock [Member] | UBP Acquisition [Member]
Supplemental disclosure of non-cash transactions:
Stock exchanged	818,530
Preferred Stock [Member] | UBP Acquisition [Member]
Supplemental disclosure of non-cash transactions:
Stock exchanged	225,000
Partnership Interest [Member]
Cash flows from operating activities:
Net income	370,867	488,035	366,288
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	352,282	319,697	303,331
Amortization of deferred loan costs and debt premiums	8,252	5,799	6,003
Accretion of above and below market lease intangibles, net	(29,130)	(20,995)	(22,936)
Stock-based compensation, net of capitalization	20,075	16,521	12,515
Equity in income of investments in real estate partnerships	(50,541)	(59,824)	(47,086)
Gain on sale of real estate, net of tax	(661)	(109,005)	(91,119)
Provision for impairment of real estate, net of tax			84,389
Early extinguishment of debt	(99)
Distribution of earnings from investments in real estate partnerships	66,531	61,416	71,934
Settlement of derivative instruments			(2,472)
Deferred compensation expense (income)	4,782	(6,128)	4,572
Realized and unrealized (gain) loss on investments	(5,571)	7,040	(5,348)
Changes in assets and liabilities:
Tenant and other receivables	(13,904)	(35,274)	(24,869)
Deferred leasing costs	(11,156)	(10,801)	(6,966)
Other assets	3,028	1,292	(1,226)
Accounts payable and other liabilities	5,152	(9,088)	6,677
Tenants’ security, escrow deposits and prepaid rent	(316)	7,130	5,701
Net cash provided by operating activities	719,591	655,815	659,388
Cash flows from investing activities:
Acquisition of operating real estate, net of cash acquired of $0, $3,061 and $2,991 in 2023, 2022 and 2021, respectively	(45,386)	(169,639)	(392,051)
Acquisition of UBP, net of cash acquired of $14,143	(82,389)
Real estate development and capital improvements	(232,855)	(195,418)	(177,631)
Proceeds from sale of real estate	11,167	143,133	206,193
Issuance of notes receivable	(4,000)		(20)
Collection of notes receivable	4,000	1,823
Investments in real estate partnerships	(13,119)	(36,266)	(23,476)
Return of capital from investments in real estate partnerships	11,308	48,473	99,945
Dividends on investment securities	1,283	1,113	813
Acquisition of investment securities	(7,990)	(21,112)	(23,971)
Proceeds from sale of investment securities	16,003	21,785	23,846
Net cash used in investing activities	(341,978)	(206,108)	(286,352)
Cash flows from financing activities:
Net proceeds from common stock issuance	(33)	61,284	82,510
Repurchase of common shares in conjunction with equity award plans	(7,662)	(6,447)	(4,083)
Common shares repurchased through share repurchase program	(20,006)	(75,419)
Proceeds from sale of treasury stock	103	64	96
Distributions to partners	(455,433)	(430,143)	(404,900)
Contributions from limited partners in consolidated partnerships	10,238
Distributions to limited partners in consolidated partnerships	(7,813)	(7,245)	(4,345)
Redemption of exchangeable operating partnership units	(9,163)
Dividends paid to preferred shareholders	(3,413)
Proceeds from unsecured credit facilities	557,000	95,000
Repayment of unsecured credit facilities	(405,000)	(95,000)	(265,000)
Proceeds from notes payable	59,500
Repayment of notes payable	(61,592)	(6,745)	(42,014)
Scheduled principal payments	(11,235)	(11,219)	(11,255)
Payment of loan costs	(526)	(88)	(7,468)
Net cash used in financing activities	(355,035)	(475,958)	(656,459)
Net change in cash, cash equivalents, and restricted cash	22,578	(26,251)	(283,423)
Cash, cash equivalents, and restricted cash at beginning of the year	68,776	95,027	378,450
Cash, cash equivalents, and restricted cash at end of the year	91,354	68,776	95,027
Supplemental disclosure of cash flow information:
Cash paid for interest (net of capitalized interest of $5,695, $4,166, and $4,202 in 2023, 2022, and 2021, respectively)	147,176	141,359	140,084
Cash paid for income taxes, net of refunds	933	570	378
Supplemental disclosure of non-cash transactions:
Common and Preferred stock, and exchangeable operating partnership dividends declared but not paid	126,683	111,709	107,480
Previously held equity investments in real estate assets acquired		17,179	(4,609)
Mortgage loans assumed by Company with the acquisition of real estate	98	22,779	111,104
Right of use assets obtained in exchange for new operating lease liabilities	36,577
Sale of leased asset in exchange for net investment in sales-type lease	8,510
Common stock issued for partnership units exchanged	199	1,275	99
Issuance of exchangeable operating partnership units	31,253
Real estate received in lieu of promote interest			13,589
Change in accrued capital expenditures	8,877	4,888	10,188
Common stock issued under dividend reinvestment plan	622	524	1,286
Stock-based compensation capitalized	954	735	666
Contributions to investments in real estate partnerships	920
Contributions from limited partners in consolidated partnerships, net		5,436
Reallocation of equity upon acquisition of a limited partner's interest in a consolidated partnership		6,266
Common stock issued for dividend reinvestment in trust	1,193	1,126	1,084
Contribution of stock awards into trust	2,080	2,250	1,416
Distribution of stock held in trust	2,245	786	3,647
Change in fair value of securities	338	$ 1,658	$ 513
Partnership Interest [Member] | UBP Acquisition [Member]
Supplemental disclosure of non-cash transactions:
Notes payable assumed in acquisition, at fair value	284,706
Noncontrolling interest assumed in acquisition, at fair value	64,492
Partnership Interest [Member] | Common Stock [Member] | UBP Acquisition [Member]
Supplemental disclosure of non-cash transactions:
Stock exchanged	818,530
Partnership Interest [Member] | Preferred Stock [Member] | UBP Acquisition [Member]
Supplemental disclosure of non-cash transactions:
Stock exchanged	$ 225,000