The following table summarizes net property operations income by segment for the year ended December 31, 2018 . Total Net Lease Retail Multi-Tenant Office Multi-family Other Rental income $ 34,966 $ 12,478 $ 15,814 $ 4,394 $ 2,280 $  Tenant recovery income 7,795 247 7,312 132 104  Other property income 748  39 523 186  Total income 43,509 12,725 23,165 5,049 2,570  Operating expenses 13,920 577 9,461 2,702 1,063 117 Net operating income (loss) $ 29,589 $ 12,148 $ 13,704 $ 2,347 $ 1,507 $ (117 ) Non-allocated expenses (a) (24,781 ) Other income and expenses (b) (1,877 ) Provision for asset impairment (c) (4,667 ) Gain on sale of investment properties (d) 27,863 Loss on extinguishment of debt (e) (1,199 ) Net income $ 24,928 Balance Sheet Data Real estate assets, net (f) $ 242,144 $ 36,317 $ 113,853 $ 28,337 $ 54,159 $ 9,478 Non-segmented assets (g) 93,836 Total assets 335,980 Capital expenditures $ 4,251 $  $ 676 $ 3,547 $ 35 $ (7 ) (a) Non-allocated expenses consists of general and administrative expenses and depreciation and amortization. (b) Other income and expenses consists of interest income, other income, interest expense, and income tax benefit. (c) Provision for asset impairment includes $4,667 related to one net lease asset and one land parcel. (d) Gain on the sale of investment properties is related to one retail asset, one multi-tenant office asset and one other asset. (e) Loss on extinguishment of debt is related to prepayment penalties on the payoff of mortgage debt (f) Real estate assets include intangible assets, net of amortization. (g) Non-segmented assets include cash and cash equivalents, restricted cash and escrows, accounts and rents receivable and deferred costs and other assets. The following table summarizes net property operations income by segment for the year ended December 31, 2017 . Total Net Lease Retail Multi-Tenant Office Multi-family Other Rental income $ 47,115 $ 23,207 $ 16,536 $ 6,962 $ 410 $  Tenant recovery income 7,342 289 7,098 (117 ) 28 44 Other property income 1,005 60 423 383 111 28 Total income 55,462 23,556 24,057 7,228 549 72 Operating expenses and real estate taxes 18,291 3,702 9,134 3,782 241 1,432 Net operating income (loss) $ 37,171 $ 19,854 $ 14,923 $ 3,446 $ 308 $ (1,360 ) Non-allocated expenses (a) (28,149 ) Other income and expenses (b) (12,429 ) Provision for asset impairment (c) (25,849 ) Gain on sale of investment properties (d) 8,674 Gain on extinguishment of debt (e) 194,581 Net income $ 173,999 Balance Sheet Data Real estate assets, net (f) $ 266,483 $ 42,671 $ 147,971 $ 46,791 $ 19,428 $ 9,622 Non-segmented assets (g) $ 63,134 Total assets $ 329,617 Capital expenditures $ 8,833 $  $ 1,279 $ 7,381 $  $ 173 (a) Non-allocated expenses consists of general and administrative expenses and depreciation and amortization. (b) Other income and expenses consists of interest income, other income, interest expense, and income tax expense. (c) Provision for asset impairment includes $25,849 related to one multi-tenant office asset, one net lease asset, and one land parcel. (d) Gain on sale of investment properties is related to the disposition of two land parcels and one multi-tenant office asset. (e) Gain on extinguishment of debt is related to two net lease and one multi-tenant office asset. (f) Real estate assets include intangible assets, net of amortization. (g) Non-segmented assets include cash and cash equivalents, restricted cash and escrows, accounts and rents receivable, and deferred costs and other assets.