Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Real Estate Investment Property, at Cost [Abstract]
Real estate assets, at cost	$ 11,154,800	$ 11,095,294
Less: accumulated depreciation	1,954,181	1,766,162
Real estate assets, net	9,200,619	9,329,132
Investments in real estate partnerships	474,308	469,522
Properties held for sale	51,332	45,565
Cash, cash equivalents, and restricted cash, including $4,325 and $2,542 of restricted cash at September 30, 2020 and December 31, 2019, respectively	280,876	115,562
Tenant and other receivables	159,137	169,337
Deferred leasing costs, less accumulated amortization of $113,650 and $108,381 at September 30, 2020 and December 31, 2019, respectively	70,499	76,798
Acquired lease intangible assets, less accumulated amortization of $279,139 and $259,310 at September 30, 2020 and December 31, 2019, respectively	201,472	242,822
Right of use assets, net	288,138	292,786
Other assets	260,258	390,729
Total assets	10,986,639	11,132,253
Less: accumulated depreciation	1,954,181	1,766,162
Real estate assets, net	9,200,619	9,329,132
Investments in real estate partnerships	474,308	469,522
Properties held for sale	51,332	45,565
Liabilities:
Notes payable	3,723,923	3,435,161
Unsecured credit facilities	264,605	484,383
Accounts payable and other liabilities	222,375	213,705
Acquired lease intangible liabilities, less accumulated amortization of $145,513 and $131,676 at September 30, 2020 and December 31, 2019, respectively	390,399	427,260
Lease liabilities	220,082	222,918
Tenants’ security, escrow deposits and prepaid rent	52,132	58,865
Total liabilities	4,873,516	4,842,292
Commitments and contingencies		0
Equity/Capital:
Common stock, $0.01 par value per share, 220,000,000 shares authorized; 169,677,302 and 167,571,218 shares issued at September 30, 2020 and December 31, 2019, respectively	1,697	1,676
Treasury stock at cost, 466,469 and 440,574 shares held at September 30, 2020 and December 31, 2019, respectively	(24,687)	(23,199)
Additional paid-in-capital	7,789,142	7,654,930
Accumulated other comprehensive loss	(23,220)	(11,997)
Distributions in excess of net income	(1,703,338)	(1,408,062)
Total stockholders’ equity	6,039,594	6,213,348
Exchangeable operating partnership units, aggregate redemption value of 29,087 and 47,092 at September 30, 2020 and December 31, 2019, respectively	35,987	36,100
Limited partners’ interests in consolidated partnerships	37,542	40,513
Total noncontrolling interests	73,529	76,613
Total equity	6,113,123	6,289,961
Total equity	6,113,123	6,289,961
Total liabilities and equity	10,986,639	11,132,253
Partnership Interest [Member]
Real Estate Investment Property, at Cost [Abstract]
Real estate assets, at cost	11,154,800	11,095,294
Less: accumulated depreciation	1,954,181	1,766,162
Real estate assets, net	9,200,619	9,329,132
Investments in real estate partnerships	474,308	469,522
Properties held for sale	51,332	45,565
Cash, cash equivalents, and restricted cash, including $4,325 and $2,542 of restricted cash at September 30, 2020 and December 31, 2019, respectively	280,876	115,562
Tenant and other receivables	159,137	169,337
Deferred leasing costs, less accumulated amortization of $113,650 and $108,381 at September 30, 2020 and December 31, 2019, respectively	70,499	76,798
Acquired lease intangible assets, less accumulated amortization of $279,139 and $259,310 at September 30, 2020 and December 31, 2019, respectively	201,472	242,822
Right of use assets, net	288,138	292,786
Other assets	260,258	390,729
Total assets	10,986,639	11,132,253
Less: accumulated depreciation	1,954,181	1,766,162
Real estate assets, net	9,200,619	9,329,132
Investments in real estate partnerships	474,308	469,522
Properties held for sale	51,332	45,565
Liabilities:
Notes payable	3,723,923	3,435,161
Unsecured credit facilities	264,605	484,383
Accounts payable and other liabilities	222,375	213,705
Acquired lease intangible liabilities, less accumulated amortization of $145,513 and $131,676 at September 30, 2020 and December 31, 2019, respectively	390,399	427,260
Lease liabilities	220,082	222,918
Tenants’ security, escrow deposits and prepaid rent	52,132	58,865
Total liabilities	4,873,516	4,842,292
Commitments and contingencies
Equity/Capital:
General partner; 169,677,302 and 167,571,218 units outstanding at September 30, 2020 and December 31, 2019, respectively	6,062,814	6,225,345
Limited partners; 765,046 and 746,433 units outstanding at September 30, 2020 and December 31, 2019, respectively	35,987	36,100
Accumulated other comprehensive loss	(23,220)	(11,997)
Total partners’ capital	6,075,581	6,249,448
Limited partners’ interests in consolidated partnerships	37,542	40,513
Total capital	6,113,123	6,289,961
Total capital	6,113,123	6,289,961
Total liabilities and equity	$ 10,986,639	$ 11,132,253