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Consolidated Statements of Operations - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Revenue |  |  |
Total revenue | $ 534,852 | $ 580,417 | $ 544,345
Operating expenses |  |  |
Property operating expenses | 132,172 | 154,361 | 154,848
Real estate taxes | 63,032 | 62,237 | 51,341
Third party management expenses | 10,252 | 9,248 | 11,910
Depreciation and amortization | 188,283 | 210,005 | 176,000
General and administrative expenses | 30,288 | 32,156 | 27,802
Provision for impairment | 0 | 0 | 71,707
Total operating expenses | 424,027 | 468,007 | 493,608
Gain on sale of real estate |  |  |
Net gain on disposition of real estate | 289,461 | 356 | 2,932
Net gain on sale of undepreciated real estate | 201 | 2,020 | 3,040
Total gain on sale of real estate | 289,662 | 2,376 | 5,972
Operating income | 400,487 | 114,786 | 56,709
Other income (expense): |  |  |
Interest income | 1,939 | 2,318 | 4,703
Interest expense | (73,911) | (81,512) | (78,199)
Interest expense - amortization of deferred financing costs | (2,904) | (2,768) | (2,498)
Equity in loss of Real Estate Ventures | (18,584) | (9,922) | (15,231)
Net gain on real estate venture transactions | 75 | 11,639 | 142,233
Gain on promoted interest in unconsolidated real estate venture | 0 | 0 | 28,283
Loss on early extinguishment of debt | 0 | 0 | (105)
Net income before income taxes | 307,102 | 34,541 | 135,895
Income tax (provision) benefit | 224 | (12) | (423)
Net income | 307,326 | 34,529 | 135,472
Net income attributable to noncontrolling interests | (1,799) | (262) | (954)
Net income attributable to Brandywine Realty Trust | 305,527 | 34,267 | 134,518
Nonforfeitable dividends allocated to unvested restricted shareholders | (410) | (396) | (369)
Net income attributable to Common Shareholders/ Unitholders of Brandywine Realty Trust | $ 305,117 | $ 33,871 | $ 134,149
Basic income per Common Share (in dollars per shares) | $ 1.77 | $ 0.19 | $ 0.75
Diluted income per Common Share (in dollars per share) | $ 1.77 | $ 0.19 | $ 0.75
Basic weighted average shares outstanding (in shares) | 171,926,079 | 176,132,941 | 178,519,748
Diluted weighted average shares outstanding (in shares) | 172,317,076 | 176,686,813 | 179,641,492
BRANDYWINE OPERATING PARTNERSHIP, L.P. |  |  |
Revenue |  |  |
Total revenue | $ 534,852 | $ 580,417 | $ 544,345
Operating expenses |  |  |
Property operating expenses | 132,172 | 154,361 | 154,848
Real estate taxes | 63,032 | 62,237 | 51,341
Third party management expenses | 10,252 | 9,248 | 11,910
Depreciation and amortization | 188,283 | 210,005 | 176,000
General and administrative expenses | 30,288 | 32,156 | 27,802
Provision for impairment | 0 | 0 | 71,707
Total operating expenses | 424,027 | 468,007 | 493,608
Gain on sale of real estate |  |  |
Net gain on disposition of real estate | 289,461 | 356 | 2,932
Net gain on sale of undepreciated real estate | 201 | 2,020 | 3,040
Total gain on sale of real estate | 289,662 | 2,376 | 5,972
Operating income | 400,487 | 114,786 | 56,709
Other income (expense): |  |  |
Interest income | 1,939 | 2,318 | 4,703
Interest expense | (73,911) | (81,512) | (78,199)
Interest expense - amortization of deferred financing costs | (2,904) | (2,768) | (2,498)
Equity in loss of Real Estate Ventures | (18,584) | (9,922) | (15,231)
Net gain on real estate venture transactions | 75 | 11,639 | 142,233
Gain on promoted interest in unconsolidated real estate venture | 0 | 0 | 28,283
Loss on early extinguishment of debt | 0 | 0 | (105)
Net income before income taxes | 307,102 | 34,541 | 135,895
Income tax (provision) benefit | 224 | (12) | (423)
Net income | 307,326 | 34,529 | 135,472
Net income attributable to noncontrolling interests - consolidated real estate ventures | (20) | (69) | (55)
Net income attributable to Brandywine Operating Partnership | 307,306 | 34,460 | 135,417
Nonforfeitable dividends allocated to unvested restricted shareholders | (410) | (396) | (369)
Net income attributable to Common Shareholders/ Unitholders of Brandywine Realty Trust | $ 306,896 | $ 34,064 | $ 135,048
Basic income per Common Share (in dollars per shares) | $ 1.77 | $ 0.19 | $ 0.75
Diluted income per Common Share (in dollars per share) | $ 1.77 | $ 0.19 | $ 0.75
Basic weighted average shares outstanding (in shares) | 172,907,713 | 177,114,932 | 179,959,370
Diluted weighted average shares outstanding (in shares) | 173,298,710 | 177,668,804 | 181,081,114
Rents |  |  |
Revenue |  |  |
Total revenue | $ 513,504 | $ 554,665 | $ 515,044
Rents | BRANDYWINE OPERATING PARTNERSHIP, L.P. |  |  |
Revenue |  |  |
Total revenue | 513,504 | 554,665 | 515,044
Third party management fees, labor reimbursement and leasing |  |  |
Revenue |  |  |
Total revenue | 18,580 | 19,626 | 22,557
Third party management fees, labor reimbursement and leasing | BRANDYWINE OPERATING PARTNERSHIP, L.P. |  |  |
Revenue |  |  |
Total revenue | 18,580 | 19,626 | 22,557
Other |  |  |
Revenue |  |  |
Total revenue | 2,768 | 6,126 | 6,744
Other | BRANDYWINE OPERATING PARTNERSHIP, L.P. |  |  |
Revenue |  |  |
Total revenue | $ 2,768 | $ 6,126 | $ 6,744

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