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CONSOLIDATED STATEMENTS OF OPERATIONS OF ERP OPERATING LIMITED PARTNERSHIP - USD ($) shares in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
REVENUES |  |  |
Rental income | $ 2,577,681 | $ 2,470,689 | $ 2,422,233
Fee and asset management | $ 753 | $ 717 | $ 3,567
Type of Revenue [Extensible List] | us-gaap:ManagementServiceMember | us-gaap:ManagementServiceMember | us-gaap:ManagementServiceMember
Total revenues | $ 2,578,434 | $ 2,471,406 | $ 2,425,800
EXPENSES |  |  |
Property and maintenance | 429,335 | 405,281 | 406,823
Real estate taxes and insurance | 357,814 | 335,495 | 317,387
Property management | 92,485 | 85,493 | 82,015
General and administrative | 53,813 | 52,224 | 57,840
Depreciation | 785,725 | 743,749 | 705,649
Impairment | 702 | 1,693 | 0
Total expenses | 1,719,874 | 1,623,935 | 1,569,714
Operating income | 858,560 | 847,471 | 856,086
Interest and other income | 15,317 | 6,136 | 65,773
Other expenses | (17,267) | (5,186) | (10,368)
Interest: |  |  |
Expense incurred, net | (413,360) | (383,890) | (482,246)
Amortization of deferred financing costs | (11,310) | (8,526) | (12,633)
Income before income and other taxes, income (loss) from investments in unconsolidated entities, net gain (loss) on sales of real estate properties and land parcels and discontinued operations | 431,940 | 456,005 | 416,612
Income and other tax (expense) benefit | (878) | (478) | (1,613)
Income (loss) from investments in unconsolidated entities | (3,667) | (3,370) | 4,801
Net gain (loss) on sales of real estate properties | 256,810 | 157,057 | 4,044,055
Net gain (loss) on sales of land parcels | 987 | 19,167 | 15,731
Income from continuing operations | 685,192 | 628,381 | 4,479,586
Discontinued operations, net | 0 | 0 | 518
Net income | 685,192 | 628,381 | 4,480,104
Partially Owned Properties | (2,718) | (2,323) | (16,430)
Net income attributable to controlling interests | $ 657,535 | $ 603,454 | $ 4,292,163
Earnings per Unit – basic: |  |  |
Income from continuing operations available to Units | $ 1.78 | $ 1.64 | $ 11.75
Net income available to Units | 1.78 | 1.64 | 11.75
Earnings per Unit – diluted: |  |  |
Income from continuing operations available to Units | 1.77 | 1.63 | 11.68
Net income available to Units | $ 1.77 | $ 1.63 | $ 11.68
Weighted average Units outstanding | 383,695 | 382,678 | 381,992
ERPOP [Member] |  |  |
REVENUES |  |  |
Rental income | $ 2,577,681 | $ 2,470,689 | $ 2,422,233
Fee and asset management | $ 753 | $ 717 | $ 3,567
Type of Revenue [Extensible List] | us-gaap:ManagementServiceMember | us-gaap:ManagementServiceMember | us-gaap:ManagementServiceMember
Total revenues | $ 2,578,434 | $ 2,471,406 | $ 2,425,800
EXPENSES |  |  |
Property and maintenance | 429,335 | 405,281 | 406,823
Real estate taxes and insurance | 357,814 | 335,495 | 317,387
Property management | 92,485 | 85,493 | 82,015
General and administrative | 53,813 | 52,224 | 57,840
Depreciation | 785,725 | 743,749 | 705,649
Impairment | 702 | 1,693 |
Total expenses | 1,719,874 | 1,623,935 | 1,569,714
Operating income | 858,560 | 847,471 | 856,086
Interest and other income | 15,317 | 6,136 | 65,773
Other expenses | (17,267) | (5,186) | (10,368)
Interest: |  |  |
Expense incurred, net | (413,360) | (383,890) | (482,246)
Amortization of deferred financing costs | (11,310) | (8,526) | (12,633)
Income before income and other taxes, income (loss) from investments in unconsolidated entities, net gain (loss) on sales of real estate properties and land parcels and discontinued operations | 431,940 | 456,005 | 416,612
Income and other tax (expense) benefit | (878) | (478) | (1,613)
Income (loss) from investments in unconsolidated entities | (3,667) | (3,370) | 4,801
Net gain (loss) on sales of real estate properties | 256,810 | 157,057 | 4,044,055
Net gain (loss) on sales of land parcels | 987 | 19,167 | 15,731
Income from continuing operations | 685,192 | 628,381 | 4,479,586
Discontinued operations, net |  |  | 518
Net income | 685,192 | 628,381 | 4,480,104
Partially Owned Properties | (2,718) | (2,323) | (16,430)
Net income attributable to controlling interests | 682,474 | 626,058 | 4,463,674
ALLOCATION OF NET INCOME: |  |  |
Preference Units | 3,090 | 3,091 | 3,091
General Partner | 654,445 | 600,363 | 4,289,072
Limited Partners | 24,939 | 22,604 | 171,511
Net income available to Units | $ 679,384 | $ 622,967 | $ 4,460,583
Earnings per Unit – basic: |  |  |
Income from continuing operations available to Units | $ 1.78 | $ 1.64 | $ 11.75
Net income available to Units | $ 1.78 | $ 1.64 | $ 11.75
Weighted average Units outstanding | 380,921 | 379,869 | 378,829
Earnings per Unit – diluted: |  |  |
Income from continuing operations available to Units | $ 1.77 | $ 1.63 | $ 11.68
Net income available to Units | $ 1.77 | $ 1.63 | $ 11.68
Weighted average Units outstanding | 383,695 | 382,678 | 381,992

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