Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Real Estate Investment Property, at Cost [Abstract]
Real estate assets, at cost	$ 11,137,612	$ 11,095,294
Less: accumulated depreciation	1,829,005	1,766,162
Real estate assets, net	9,308,607	9,329,132
Investments in real estate partnerships	489,500	469,522
Properties held for sale	27,889	45,565
Cash, cash equivalents and restricted cash, including $3,595 and $2,542 of restricted cash at March 31, 2020 and December 31, 2019, respectively	736,845	115,562
Tenant and other receivables	148,058	169,337
Deferred leasing costs, less accumulated amortization of $110,158 and $108,381 at March 31, 2020 and December 31, 2019, respectively	77,100	76,798
Acquired lease intangible assets, less accumulated amortization of $268,063 and $259,310 at March 31, 2020 and December 31, 2019, respectively	228,819	242,822
Right of use assets, net	290,993	292,786
Other assets	260,500	390,729
Total assets	11,568,311	11,132,253
Less: accumulated depreciation	1,829,005	1,766,162
Real estate assets, net	9,308,607	9,329,132
Investments in real estate partnerships	489,500	469,522
Properties held for sale	27,889	45,565
Liabilities:
Notes payable	3,445,400	3,435,161
Unsecured credit facilities	969,457	484,383
Accounts payable and other liabilities	194,835	213,705
Acquired lease intangible liabilities, less accumulated amortization of $144,682 and $131,676 at March 31, 2020 and December 31, 2019, respectively	413,108	427,260
Lease liabilities	221,703	222,918
Tenants’ security, escrow deposits and prepaid rent	48,573	58,865
Total liabilities	5,293,076	4,842,292
Commitments and contingencies		0
Equity:
Common stock, $0.01 par value per share, 220,000,000 shares authorized; 169,620,627 and 167,571,218 shares issued at March 31, 2020 and December 31, 2019, respectively	1,696	1,676
Treasury stock at cost, 449,979 and 440,574 shares held at March 31, 2020 and December 31, 2019, respectively	(23,897)	(23,199)
Additional paid-in-capital	7,780,336	7,654,930
Accumulated other comprehensive loss	(25,531)	(11,997)
Distributions in excess of net income	(1,533,182)	(1,408,062)
Total stockholders’ equity	6,199,422	6,213,348
Treasury stock at cost, 000,000 and 440,574 shares held at March 31, 2020 and December 31, 2019, respectively	23,897	23,199
Exchangeable operating partnership units, aggregate redemption value of $29,401 and $47,092 at March 31, 2020 and December 31, 2019, respectively	36,744	36,100
Limited partners’ interests in consolidated partnerships	39,069	40,513
Total noncontrolling interests	75,813	76,613
Total equity	6,275,235	6,289,961
Total equity	6,275,235	6,289,961
Total liabilities and equity	11,568,311	11,132,253
Partnership Interest [Member]
Real Estate Investment Property, at Cost [Abstract]
Real estate assets, at cost	11,137,612	11,095,294
Less: accumulated depreciation	1,829,005	1,766,162
Real estate assets, net	9,308,607	9,329,132
Investments in real estate partnerships	489,500	469,522
Properties held for sale	27,889	45,565
Cash, cash equivalents and restricted cash, including $3,595 and $2,542 of restricted cash at March 31, 2020 and December 31, 2019, respectively	736,845	115,562
Tenant and other receivables	148,058	169,337
Deferred leasing costs, less accumulated amortization of $110,158 and $108,381 at March 31, 2020 and December 31, 2019, respectively	77,100	76,798
Acquired lease intangible assets, less accumulated amortization of $268,063 and $259,310 at March 31, 2020 and December 31, 2019, respectively	228,819	242,822
Right of use assets, net	290,993	292,786
Other assets	260,500	390,729
Total assets	11,568,311	11,132,253
Less: accumulated depreciation	1,829,005	1,766,162
Real estate assets, net	9,308,607	9,329,132
Investments in real estate partnerships	489,500	469,522
Properties held for sale	27,889	45,565
Liabilities:
Notes payable	3,445,400	3,435,161
Unsecured credit facilities	969,457	484,383
Accounts payable and other liabilities	194,835	213,705
Acquired lease intangible liabilities, less accumulated amortization of $144,682 and $131,676 at March 31, 2020 and December 31, 2019, respectively	413,108	427,260
Lease liabilities	221,703	222,918
Tenants’ security, escrow deposits and prepaid rent	48,573	58,865
Total liabilities	5,293,076	4,842,292
Commitments and contingencies	0	0
Equity:
General partner; 000,000,000 and 167,571,218 units outstanding at March 31, 2020 and December 31, 2019, respectively	6,224,953	6,225,345
Limited partners; 000,000 and 746,433 units outstanding at March 31, 2020 and December 31, 2019	36,744	36,100
Accumulated other comprehensive loss	(25,531)	(11,997)
Total partners’ capital	6,236,166	6,249,448
Limited partners’ interests in consolidated partnerships	39,069	40,513
Total capital	6,275,235	6,289,961
Total capital	6,275,235	6,289,961
Total liabilities and equity	$ 11,568,311	$ 11,132,253