The following table summarizes net property operations income by segment for the three months ended September 30, 2018 . Total Net Lease Retail Multi-Tenant Office Multi-family Other Rental income $ 9,323 $ 3,120 $ 4,146 $ 1,450 $ 607 $  Tenant recovery income 2,123 62 2,036 (4 ) 29  Other property income 203  13 92 98  Total income 11,649 3,182 6,195 1,538 734  Operating expenses and real estate taxes 3,741 98 2,524 685 284 150 Net operating income $ 7,908 $ 3,084 $ 3,671 $ 853 $ 450 $ (150 ) Non-allocated expenses (a) (6,000 ) Other income and expenses (b) (596 ) Gain on sale of investment properties (c) 12,276 Loss on extinguishment of debt $ (1,199 ) Net income $ 12,389 (a) Non-allocated expenses consist of general and administrative expenses and depreciation and amortization. (b) Other income and expenses consists of interest income, other income and interest expense. (c) Gain on the sale of investment properties is related to one retail asset and one other asset. (d) Loss on extinguishment of debt is related to prepayment penalties on the payoff of mortgage debt. The following table summarizes net property operations income by segment for the three months ended September 30, 2017 . Total Net Lease Retail Multi-Tenant Office Multi-family Other Rental income $ 10,901 $ 5,344 $ 4,086 $ 1,339 $ 132 $  Tenant recovery income 1,973 40 1,927 1 5  Other property income 129  13 87 23 6 Total income 13,003 5,384 6,026 1,427 160 6 Operating expenses 3,747 192 2,359 795 72 329 Net operating income (loss) $ 9,256 $ 5,192 $ 3,667 $ 632 $ 88 $ (323 ) Non-allocated expenses (a) (5,377 ) Other income and expenses (b) (35 ) Provision for asset impairment (c) (485 ) Loss on sale of investment properties (29 ) Gain on extinguishment of debt (d) 77,466 Net income $ 80,796 (a) Non-allocated expenses consist of general and administrative expenses and depreciation and amortization. (b) Other income and expenses consist of other income, interest income, interest expense and income tax expense. (c) Provision for asset impairment is for one multi-tenant office asset. (d) Gain on extinguishment of debt is related to one net lease asset. Refer to Note 4 for additional information. The following table summarizes net property operations income by segment for the nine months ended September 30, 2018 . Total Net Lease Retail Multi-Tenant Office Multi-family Other Rental income $ 26,401 $ 9,359 $ 12,578 $ 3,231 $ 1,233 $  Tenant recovery income 5,991 183 5,677 61 70  Other property income 725  32 432 261  Total income 33,117 9,542 18,287 3,724 1,564  Operating expenses and real estate taxes 10,276 458 7,201 2,064 667 (114 ) Net operating income $ 22,841 $ 9,084 $ 11,086 $ 1,660 $ 897 $ 114 Non-allocated expenses (a) (19,529 ) Other income and expenses (b) (1,565 ) Gain on sale of investment properties (c) 12,301 Loss on extinguishment of debt (d) (1,199 ) Net income $ 12,849 Balance Sheet Data Real estate assets, net (e) $ 268,991 $ 40,730 $ 116,462 $ 47,470 $ 54,651 $ 9,678 Non-segmented assets (f) 53,793 Total assets $ 322,784 Capital expenditures $ 3,977 $  $ 1,835 $ 2,076 $ 9 $ 57 (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) Gain on the sale of investment properties is related to one retail asset, a parcel of one retail asset and one other asset. (d) Loss on extinguishment of debt is related to prepayment penalties on the payoff of mortgage debt. (e) Real estate assets include intangible assets, net of amortization. (f) 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 nine months ended September 30, 2017 . Total Net Lease Retail Multi-Tenant Office Multi-family Other Rental income $ 38,260 $ 20,088 $ 12,259 $ 5,782 $ 132 $ (1 ) Tenant recovery income 5,640 233 5,413 (55 ) 5 44 Other property income 823 60 420 296 23 24 Total income 44,723 20,381 18,092 6,023 160 67 Operating expenses and real estate taxes 14,291 3,431 6,744 2,984 72 1,060 Net operating income (loss) $ 30,432 $ 16,950 $ 11,348 $ 3,039 $ 88 $ (993 ) Non-allocated expenses (a) (22,551 ) Other income and expenses (b) (11,656 ) Provision for asset impairment (c) (1,197 ) Loss on sale of investment properties (32 ) Gain on extinguishment of debt (d) 194,366 Net income $ 189,362 Balance Sheet Data Real estate assets, net (e) $ 321,091 $ 68,057 $ 149,407 $ 52,740 $ 19,596 $ 31,591 Non-segmented assets (f) 24,454 Total assets $ 345,545 Capital expenditures $ 6,165 $  $ 668 $ 5,344 $  $ 153 (a) Non-allocated expenses consists of general and administrative expenses and depreciation and amortization. (b) Other income and expenses consists of other income, interest income, interest expense and income tax expense. (c) Provision for asset impairment is for one other related asset and one multi-tenant office asset. (d) Gain on extinguishment of debt is related to two net lease and one multi-tenant office related assets. Refer to Note 4 for additional information. (e) Real estate assets include intangible assets, net of amortization. (f) Non-segmented assets include cash and cash equivalents, restricted cash and escrows, accounts and rents receivable and deferred costs and other assets.