Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Real Estate Investment Property, at Cost [Abstract]
Real estate assets, at cost (note 1):	$ 11,095,294	$ 10,863,162
Less: accumulated depreciation	1,766,162	1,535,444
Real estate assets, net	9,329,132	9,327,718
Investments in real estate partnerships (note 4)	469,522	463,001
Properties held for sale	45,565	60,516
Cash, cash equivalents, and restricted cash, including $2,542 and $2,658 of restricted cash at December 31, 2019 and 2018, respectively (note 1)	115,562	45,190
Tenant and other receivables (note 1)	169,337	172,359
Deferred leasing costs, less accumulated amortization of $108,381 and $101,093 at December 31, 2019 and 2018, respectively	76,798	84,983
Acquired lease intangible assets, less accumulated amortization of $259,310 and $219,689 at December 31, 2019 and 2018, respectively (note 6)	242,822	387,069
Right of use assets, net	292,786	0
Other assets (note 5)	390,729	403,827
Total assets	11,132,253	10,944,663
Liabilities:
Notes payable (note 9)	3,435,161	3,006,478
Unsecured credit facilities (note 9)	484,383	708,734
Accounts payable and other liabilities	213,705	224,807
Acquired lease intangible liabilities, less accumulated amortization of $131,676 and $92,746 at December 31, 2019 and 2018, respectively (note 6)	427,260	496,726
Lease liabilities	222,918	0
Tenants’ security, escrow deposits and prepaid rent	58,865	57,750
Total liabilities	4,842,292	4,494,495
Commitments and contingencies (note 16)	0	0
Stockholders’ equity/Partners' capital:
Common stock $0.01 par value per share, 220,000,000 shares authorized; 167,571,218 and 167,904,593 shares issued at December 31, 2019 and 2018, respectively	1,676	1,679
Treasury stock at cost, 440,574 and 390,163 shares held at December 31, 2019 and 2018, respectively	(23,199)	(19,834)
Additional paid-in capital	7,654,930	7,672,517
Accumulated other comprehensive loss	(11,997)	(927)
Distributions in excess of net income	(1,408,062)	(1,255,465)
Total stockholders’ equity	6,213,348	6,397,970
Noncontrolling interests (note 12):
Exchangeable operating partnership units, aggregate redemption value of $47,092 and $20,532 at December 31, 2019 and 2018, respectively	36,100	10,666
Limited partners’ interests in consolidated partnerships (note 1)	40,513	41,532
Total noncontrolling interests	76,613	52,198
Total equity	6,289,961	6,450,168
Total liabilities and equity	11,132,253	10,944,663
Partnership Interest [Member]
Real Estate Investment Property, at Cost [Abstract]
Real estate assets, at cost (note 1):	11,095,294	10,863,162
Less: accumulated depreciation	1,766,162	1,535,444
Real estate assets, net	9,329,132	9,327,718
Investments in real estate partnerships (note 4)	469,522	463,001
Properties held for sale	45,565	60,516
Cash, cash equivalents, and restricted cash, including $2,542 and $2,658 of restricted cash at December 31, 2019 and 2018, respectively (note 1)	115,562	45,190
Tenant and other receivables (note 1)	169,337	172,359
Deferred leasing costs, less accumulated amortization of $108,381 and $101,093 at December 31, 2019 and 2018, respectively	76,798	84,983
Acquired lease intangible assets, less accumulated amortization of $259,310 and $219,689 at December 31, 2019 and 2018, respectively (note 6)	242,822	387,069
Right of use assets, net	292,786	0
Other assets (note 5)	390,729	403,827
Total assets	11,132,253	10,944,663
Liabilities:
Notes payable (note 9)	3,435,161	3,006,478
Unsecured credit facilities (note 9)	484,383	708,734
Accounts payable and other liabilities	213,705	224,807
Acquired lease intangible liabilities, less accumulated amortization of $131,676 and $92,746 at December 31, 2019 and 2018, respectively (note 6)	427,260	496,726
Lease liabilities	222,918	0
Tenants’ security, escrow deposits and prepaid rent	58,865	57,750
Total liabilities	4,842,292	4,494,495
Commitments and contingencies (note 16)	0	0
Stockholders’ equity/Partners' capital:
General partner; 167,904,593 and 171,364,908 units outstanding at December 31, 2019 and 2018, respectively	6,225,345	6,398,897
Limited partners; 349,902 units outstanding at December 31, 2019 and 2018	36,100	10,666
Accumulated other comprehensive loss	(11,997)	(927)
Total partners’ capital	6,249,448	6,408,636
Noncontrolling interests (note 12):
Limited partners’ interests in consolidated partnerships (note 1)	40,513	41,532
Total capital	6,289,961	6,450,168
Total liabilities and equity	$ 11,132,253	$ 10,944,663