Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Cash flows from operating activities:
Net income	$ 88,847	$ 118,848	$ 391,650	$ 297,305
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization			237,462	226,935
Amortization of deferred loan costs and debt premiums			4,297	4,608
(Accretion) and amortization of above and below market lease intangibles, net			(15,625)	(17,244)
Stock-based compensation, net of capitalization			12,592	9,272
Equity in income of investments in real estate partnerships	(11,209)	(14,243)	(47,855)	(26,344)
Gain on sale of real estate, net of tax			(106,459)	(38,198)
Provision for impairment of real estate, net of tax		(20)		115
Distribution of earnings from investments in real estate partnerships			45,238	54,310
Settlement of derivative instruments				(2,472)
Deferred compensation expense			(8,016)	2,707
Realized and unrealized (gain) loss on investments			9,253	(3,177)
Changes in assets and liabilities:
Tenant and other receivables			(18,544)	(8,659)
Deferred leasing costs			(7,022)	(7,103)
Other assets			(4,312)	(6,932)
Accounts payable and other liabilities			21,656	25,879
Tenants' security, escrow deposits and prepaid rent			13,927	(2,524)
Net cash provided by operating activities			528,242	508,478
Cash flows from investing activities:
Acquisition of operating real estate, net of cash acquired of $3,061 in 2022 and $2,991 in 2021			(141,275)	(78,111)
Real estate development and capital improvements			(143,724)	(120,827)
Proceeds from sale of real estate			137,280	131,861
Issuance of notes receivable				(20)
Investments in real estate partnerships			(13,573)	(21,788)
Return of capital from investments in real estate partnerships			48,473	86,449
Dividends on investment securities			336	125
Acquisition of investment securities			(15,205)	(22,422)
Proceeds from sale of investment securities			15,821	23,162
Net cash used in investing activities			(111,867)	(1,571)
Cash flows from financing activities:
Net proceeds from common stock issuance			61,284	82,510
Repurchase of common shares in conjunction with equity award plans			(6,438)	(4,066)
Common units repurchased through share repurchase program			(75,419)
Proceeds from sale of treasury stock			64	96
Contributions from (distributions to) limited partners in consolidated partnerships, net			1,568	(3,272)
Distributions to exchangeable operating partnership unit holders			(1,413)	(1,363)
Dividends paid to common stockholders			(321,484)	(301,897)
Proceeds from unsecured credit facilities			95,000
Repayment of unsecured credit facilities			(95,000)	(265,000)
Repayment of notes payable			(5,995)	(13,764)
Scheduled principal payments			(8,503)	(8,448)
Payment of loan costs			(82)	(7,468)
Net cash used in financing activities			(356,418)	(522,672)
Net increase (decrease) in cash and cash equivalents and restricted cash			59,957	(15,765)
Cash and cash equivalents and restricted cash at beginning of the period			95,027	378,450	$ 378,450
Cash and cash equivalents and restricted cash at end of the period	154,984	362,685	154,984	362,685	95,027
Supplemental disclosure of cash flow information:
Cash paid for interest (net of capitalized interest of $2,985 and $3,012 in 2022 and 2021, respectively)			115,011	113,647
Cash paid for income taxes, net of refunds			488	358
Supplemental disclosure of non-cash transactions:
Common stock and exchangeable operating partnership dividends declared but not paid			107,410	101,753
Acquisition of real estate previously held within investments in real estate partnerships			17,179	(4,609)
Mortgage loans assumed by Company with the acquisition of real estate			22,779	111,090
Common stock issued for partnership units exchanged			1,275	99
Real estate received in lieu of promote interest				13,589
Change in accrued capital expenditures			10,230	5,830
Common stock issued under dividend reinvestment plan	136	404	388	1,172
Stock-based compensation capitalized			550	600
Contributions from limited partners in consolidated partnerships			5,434
Common stock issued for dividend reinvestment in trust			840	826
Contribution of stock awards into trust			2,136	1,416
Distribution of stock held in trust			786	966
Change in fair value of securities			1,896	334
Partnership Interest [Member]
Cash flows from operating activities:
Net income	88,847	118,848	391,650	297,305
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization			237,462	226,935
Amortization of deferred loan costs and debt premiums			4,297	4,608
(Accretion) and amortization of above and below market lease intangibles, net			(15,625)	(17,244)
Stock-based compensation, net of capitalization			12,592	9,272
Equity in income of investments in real estate partnerships	(11,209)	(14,243)	(47,855)	(26,344)
Gain on sale of real estate, net of tax			(106,459)	(38,198)
Provision for impairment of real estate, net of tax		(20)		115
Distribution of earnings from investments in real estate partnerships			45,238	54,310
Settlement of derivative instruments				(2,472)
Deferred compensation expense			(8,016)	2,707
Realized and unrealized (gain) loss on investments			9,253	(3,177)
Changes in assets and liabilities:
Tenant and other receivables			(18,544)	(8,659)
Deferred leasing costs			(7,022)	(7,103)
Other assets			(4,312)	(6,932)
Accounts payable and other liabilities			21,656	25,879
Tenants' security, escrow deposits and prepaid rent			13,927	(2,524)
Net cash provided by operating activities			528,242	508,478
Cash flows from investing activities:
Acquisition of operating real estate, net of cash acquired of $3,061 in 2022 and $2,991 in 2021			(141,275)	(78,111)
Real estate development and capital improvements			(143,724)	(120,827)
Proceeds from sale of real estate			137,280	131,861
Issuance of notes receivable				(20)
Investments in real estate partnerships			(13,573)	(21,788)
Return of capital from investments in real estate partnerships			48,473	86,449
Dividends on investment securities			336	125
Acquisition of investment securities			(15,205)	(22,422)
Proceeds from sale of investment securities			15,821	23,162
Net cash used in investing activities			(111,867)	(1,571)
Cash flows from financing activities:
Net proceeds from common stock issuance			61,284	82,510
Repurchase of common shares in conjunction with equity award plans			(6,438)	(4,066)
Common units repurchased through share repurchase program			(75,419)
Proceeds from sale of treasury stock			64	96
Contributions from (distributions to) limited partners in consolidated partnerships, net			1,568	(3,272)
Dividends paid to common stockholders			(322,897)	(303,260)
Proceeds from unsecured credit facilities			95,000
Repayment of unsecured credit facilities			(95,000)	(265,000)
Repayment of notes payable			(5,995)	(13,764)
Scheduled principal payments			(8,503)	(8,448)
Payment of loan costs			(82)	(7,468)
Net cash used in financing activities			(356,418)	(522,672)
Net increase (decrease) in cash and cash equivalents and restricted cash			59,957	(15,765)
Cash and cash equivalents and restricted cash at beginning of the period			95,027	378,450	378,450
Cash and cash equivalents and restricted cash at end of the period	$ 154,984	$ 362,685	154,984	362,685	$ 95,027
Supplemental disclosure of cash flow information:
Cash paid for interest (net of capitalized interest of $2,985 and $3,012 in 2022 and 2021, respectively)			115,011	113,647
Cash paid for income taxes, net of refunds			488	358
Supplemental disclosure of non-cash transactions:
Common stock and exchangeable operating partnership dividends declared but not paid			107,410	101,753
Acquisition of real estate previously held within investments in real estate partnerships			17,179	(4,609)
Mortgage loans assumed by Company with the acquisition of real estate			22,779	111,090
Common stock issued by Parent Company for partnership units exchanged			1,275	99
Change in accrued capital expenditures			10,230	5,830
Common stock issued under dividend reinvestment plan			388	1,172
Stock-based compensation capitalized			550	600
Contributions from limited partners in consolidated partnerships			5,434
Common stock issued for dividend reinvestment in trust			840	826
Contribution of stock awards into trust			2,136	1,416
Distribution of stock held in trust			786	966
Change in fair value of securities			$ 1,896	$ 334