18. SEGMENT REPORTING The Company operates in two business segments: (i) commercial and other real estate and (ii) multi-family real estate and services. The Company provides leasing, property management, acquisition, development, construction and tenant-related services for its commercial and other real estate and multi-family real estate portfolio. The Companys multi - family services business also provides similar services for third parties. The Company had no revenues from foreign countries recorded for the six months ended June 30, 2020 and 2019. The Company had no long lived assets in foreign locations as of June 30, 2020 and December 31, 2019. The accounting policies of the segments are the same as those described in Note 2: Significant Accounting Policies, excluding depreciation and amortization. The Company evaluates performance based upon net operating income from the combined properties and operations in each of its real estate segments (commercial and other real estate and multi-family real estate and services). All properties classified as discontinued operations have been excluded. Selected results of operations for the three and six months ended June 30, 2020 and 2019 and selected asset information as of June 30, 2020 and December 31, 2019 regarding the Companys operating segments are as follows. Amounts for prior periods have been restated to conform to the current period segment reporting presentation (dollars in thousands) : Commercial Multi-family Corporate Total &amp; Other Real Estate Real Estate &amp; Services (d) &amp; Other (e) Company Total revenues: Three months ended: June 30, 2020 $ 34,760 $ 38,234 $ ( 344 ) $ 72,650 June 30, 2019 41,516 44,708 381 86,605 Six months ended: June 30, 2020 74,309 81,081 ( 683 ) 154,707 June 30, 2019 95,593 81,067 211 176,871 Total operating and interest expenses (a): Three months ended: June 30, 2020 $ 15,864 $ 22,144 $ 32,243 $ 70,251 June 30, 2019 18,219 22,428 34,992 75,639 Six months ended: June 30, 2020 35,699 - 44,917 $ 60,914 141,530 June 30, 2019 42,211 43,618 64,608 150,437 Equity in earnings (loss) of unconsolidated joint ventures: Three months ended: June 30, 2020 $ ( 377 ) $ ( 569 ) $ - $ ( 946 ) June 30, 2019 512 ( 600 ) - ( 88 ) Six months ended: June 30, 2020 ( 494 ) ( 1,160 ) - ( 1,654 ) June 30, 2019 1,233 ( 2,002 ) - ( 769 ) Net operating income (loss) (b): Three months ended: June 30, 2020 $ 18,519 $ 15,521 $ ( 32,587 ) $ 1,453 June 30, 2019 23,809 21,680 ( 34,611 ) 10,878 Six months ended: June 30, 2020 38,116 35,004 ( 61,597 ) 11,523 June 30, 2019 54,615 35,447 ( 64,397 ) 25,665 Total assets: June 30, 2020 $ 2,112,116 $ 3,239,559 $ 8,337 $ 5,360,012 December 31, 2019 2,178,321 3,079,409 35,068 5,292,798 Total long-lived assets (c): June 30, 2020 $ 1,891,570 $ 2,981,246 $ ( 58 ) $ 4,872,758 December 31, 2019 1,947,053 2,812,306 3,834 4,763,193 Total investments in unconsolidated joint ventures: June 30, 2020 $ 7,699 $ 192,710 $ - $ 200,409 December 31, 2019 7,367 201,724 - 209,091 (a) Total operating and interest expenses represent the sum of: real estate taxes; utilities; operating services; real estate services expenses; general and administrative, acquisition related costs and interest expense (net of interest income). All interest expense, net of interest and other investment income, (including for property-level mortgages) is excluded from segment amounts and classified in Corporate &amp; Other for all periods. (b) Net operating income represents total revenues less total operating and interest expenses (as defined and classified in Note a), plus equity in earnings (loss) of unconsolidated joint ventures, for the period. (c) Long-lived assets are comprised of net investment in rental property, unbilled rents receivable and goodwill. (d) Segment assets and operations were owned through a consolidated variable interest entity commencing in February 2018, and which also include the Companys consolidated hotel operations. (e) Corporate &amp; Other represents all corporate-level items (including interest and other investment income, interest expense, non-property general and administrative expense), as well as intercompany eliminations necessary to reconcile to consolidated Company totals. Mack-Cali Realty Corporation The following schedule reconciles net operating income to net income (loss) available to common shareholders (dollars in thousands) : Three Months Ended Six Months Ended June 30, June 30, 2020 2019 2020 2019 Net operating income $ 1,453 $ 10,878 $ 11,523 $ 25,665 Add (deduct): Depreciation and amortization ( 27,341 ) ( 31,971 ) ( 61,137 ) ( 63,505 ) Land and other impairments ( 16,846 ) ( 2,499 ) ( 22,109 ) ( 2,499 ) Gain on change of control of interests - - - 13,790 Realized gains (losses) and unrealized losses on disposition of rental property, net - 255 ( 7,915 ) 268,364 Gain on disposition of developable land - 270 4,813 270 Gain on sale of investment in unconsolidated joint venture - - - 903 Gain from extinguishment of debt, net - 588 - 1,899 Income (loss) from continuing operations ( 42,734 ) ( 22,479 ) ( 74,825 ) 244,887 Discontinued operations Income from discontinued operations 21,729 7,952 43,722 16,180 Realized gains (losses) and unrealized losses on disposition of rental property and impairments, net ( 11,929 ) ( 5,802 ) ( 39,675 ) ( 5,802 ) Total discontinued operations, net 9,800 2,150 4,047 10,378 Net income (loss) ( 32,934 ) ( 20,329 ) ( 70,778 ) 255,265 Noncontrolling interests in consolidated joint ventures 829 847 1,005 2,095 Noncontrolling interests in Operating Partnership 4,626 2,647 8,292 ( 24,196 ) Noncontrolling interest in discontinued operations ( 937 ) ( 213 ) ( 388 ) ( 1,050 ) Redeemable noncontrolling interests ( 6,471 ) ( 5,006 ) ( 12,942 ) ( 9,673 ) Net income (loss) available to common shareholders $ ( 34,887 ) $ ( 22,054 ) $ ( 74,811 ) $ 222,441 Mack-Cali Realty, L.P. The following schedule reconciles net operating income to net income (loss) available to common unitholders (dollars in thousands) : Three Months Ended Six Months Ended June 30, June 30, 2020 2019 2020 2019 Net operating income $ 1,453 $ 10,878 $ 11,523 $ 25,665 Add (deduct): Depreciation and amortization ( 27,341 ) ( 31,971 ) ( 61,137 ) ( 63,505 ) Land and other impairments ( 16,846 ) ( 2,499 ) ( 22,109 ) ( 2,499 ) Gain on change of control of interests - - - 13,790 Realized gains (losses) and unrealized losses on disposition of rental property, net - 255 ( 7,915 ) 268,364 Gain on disposition of developable land - 270 4,813 270 Gain on sale of investment in unconsolidated joint venture - - - 903 Gain from extinguishment of debt, net - 588 - 1,899 Income (loss) from continuing operations ( 42,734 ) ( 22,479 ) ( 74,825 ) 244,887 Discontinued operations Income from discontinued operations 21,729 7,952 43,722 16,180 Realized gains (losses) and unrealized losses on disposition of rental property and impairments, net ( 11,929 ) ( 5,802 ) ( 39,675 ) ( 5,802 ) Total discontinued operations, net 9,800 2,150 4,047 10,378 Net income (loss) ( 32,934 ) ( 20,329 ) ( 70,778 ) 255,265 Noncontrolling interests in consolidated joint ventures 829 847 1,005 2,095 Redeemable noncontrolling interests ( 6,471 ) ( 5,006 ) ( 12,942 ) ( 9,673 ) Net income (loss) available to common unitholders $ ( 38,576 ) $ ( 24,488 ) $ ( 82,715 ) $ 247,687