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CONSOLIDATED STATEMENTS OF OPERATIONS OF ERP OPERATING LIMITED PARTNERSHIP - USD ($) shares in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
REVENUES |  |  |
Rental income | $ 2,571,705 | $ 2,700,691 | $ 2,577,681
EXPENSES |  |  |
Property and maintenance | 440,998 | 446,845 | 429,335
Real estate taxes and insurance | 381,562 | 366,139 | 357,814
Property management | 93,825 | 95,344 | 92,485
General and administrative | 48,305 | 52,757 | 53,813
Depreciation | 820,832 | 831,083 | 785,725
Total expenses | 1,785,522 | 1,792,168 | 1,719,172
Net gain (loss) on sales of real estate properties | 531,807 | 447,637 | 256,810
Impairment |  |  | (702)
Operating income | 1,317,990 | 1,356,160 | 1,114,617
Interest and other income | 5,935 | 3,201 | 16,070
Other expenses | (17,510) | (18,177) | (17,267)
Interest: |  |  |
Expense incurred, net | (365,073) | (390,076) | (413,360)
Amortization of deferred financing costs | (8,939) | (11,670) | (11,310)
Income before income and other taxes, income (loss) from investments in unconsolidated entities and net gain (loss) on sales of land parcels | 932,403 | 939,438 | 688,750
Income and other tax (expense) benefit | (852) | 2,281 | (878)
Income (loss) from investments in unconsolidated entities | (3,284) | 65,945 | (3,667)
Net gain (loss) on sales of land parcels | 34,234 | 2,044 | 987
Net income | 962,501 | 1,009,708 | 685,192
Partially Owned Properties | (14,855) | (3,297) | (2,718)
Net income attributable to controlling interests | $ 913,636 | $ 970,377 | $ 657,535
Earnings per Unit – basic: |  |  |
Net income available to Units | $ 2.45 | $ 2.61 | $ 1.78
Earnings per Unit – diluted: |  |  |
Net income available to Units | $ 2.45 | $ 2.60 | $ 1.77
Weighted average Units outstanding | 385,874 | 386,333 | 383,695
ERPOP [Member] |  |  |
REVENUES |  |  |
Rental income | $ 2,571,705 | $ 2,700,691 | $ 2,577,681
EXPENSES |  |  |
Property and maintenance | 440,998 | 446,845 | 429,335
Real estate taxes and insurance | 381,562 | 366,139 | 357,814
Property management | 93,825 | 95,344 | 92,485
General and administrative | 48,305 | 52,757 | 53,813
Depreciation | 820,832 | 831,083 | 785,725
Total expenses | 1,785,522 | 1,792,168 | 1,719,172
Net gain (loss) on sales of real estate properties | 531,807 | 447,637 | 256,810
Impairment |  |  | (702)
Operating income | 1,317,990 | 1,356,160 | 1,114,617
Interest and other income | 5,935 | 3,201 | 16,070
Other expenses | (17,510) | (18,177) | (17,267)
Interest: |  |  |
Expense incurred, net | (365,073) | (390,076) | (413,360)
Amortization of deferred financing costs | (8,939) | (11,670) | (11,310)
Income before income and other taxes, income (loss) from investments in unconsolidated entities and net gain (loss) on sales of land parcels | 932,403 | 939,438 | 688,750
Income and other tax (expense) benefit | (852) | 2,281 | (878)
Income (loss) from investments in unconsolidated entities | (3,284) | 65,945 | (3,667)
Net gain (loss) on sales of land parcels | 34,234 | 2,044 | 987
Net income | 962,501 | 1,009,708 | 685,192
Partially Owned Properties | (14,855) | (3,297) | (2,718)
Net income attributable to controlling interests | 947,646 | 1,006,411 | 682,474
ALLOCATION OF NET INCOME: |  |  |
Preference Units | 3,090 | 3,090 | 3,090
General Partner | 910,546 | 967,287 | 654,445
Limited Partners | 34,010 | 36,034 | 24,939
Net income available to Units | $ 944,556 | $ 1,003,321 | $ 679,384
Earnings per Unit – basic: |  |  |
Net income available to Units | $ 2.45 | $ 2.61 | $ 1.78
Weighted average Units outstanding | 384,794 | 383,368 | 380,921
Earnings per Unit – diluted: |  |  |
Net income available to Units | $ 2.45 | $ 2.60 | $ 1.77
Weighted average Units outstanding | 385,874 | 386,333 | 383,695

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