the average renewal lease term is reported in months and reflects the average renewal lease term of railcar types in the lpi , weighted by fleet composition . 27 rail north america fleet data the following table shows fleet activity for rail north america railcars , excluding boxcars , for the years ended december 31 : replace_table_token_9_th 28 the following table shows fleet statistics for rail north america boxcars for the years ended december 31 : replace_table_token_10_th the following table shows fleet activity for rail north america locomotives for the years ended december 31 : replace_table_token_11_th segment profit in 2019 , segment profit of $ 276.2 million decreased 10.3 % compared to $ 307.9 million in 2018 . the decrease was driven by lower net gains on asset dispositions , higher maintenance expense , and lower lease revenue , partially offset by higher other revenue . asset remarketing income is dependent on a number of factors and will vary from year to year . in 2018 , segment profit of $ 307.9 million increased 2.9 % compared to $ 299.3 million in 2017. the increase was driven by higher asset disposition gains and lower maintenance expense , partially offset by lower lease revenue and lower lease termination fees . 29 revenues in 2019 , lease revenue decreased $ 5.1 million , or 0.6 % . the decrease was due to lower lease rates , higher rental abatement attributable to more railcars in the maintenance network , and fewer locomotives on lease in the current year , partially offset by more railcars on lease . other revenue increased $ 28.1 million , due to higher repair revenue and higher lease termination fees in 2019. in 2018 , lease revenue decreased $ 26.5 million , or 2.9 % , primarily due to lower lease rates and fewer railcars on lease . other revenue decreased $ 9.4 million , largely a result of lower lease termination fees in 2018. other revenue in 2017 included $ 7.8 million as compensation for damage to returned railcars . the expenses to repair these railcars were recognized as incurred . expenses in 2019 , maintenance expense increased $ 13.2 million , driven by more tank qualifications in 2019 , as expected , as well as higher repairs performed by the railroads on gatx-owned railcars . depreciation expense increased $ 8.4 million due to new railcar investments , including the railcars acquired from ecn capital corporation in 2018. operating lease expense increased $ 4.8 million , primarily a result of the elimination of deferred gain amortization for sale-leaseback transactions in accordance with the new lease accounting standard . see `` note 2 . accounting changes `` and `` note 5 . leases `` in part ii , item 8 of this form 10-k for further detail regarding the impact of the new lease accounting standard . other operating expense decreased $ 3.4 million , primarily due to lower switching , storage , and freight costs as a result of continued high utilization . in 2018 , maintenance expense decreased $ 10.3 million , driven by fewer repairs performed by the railroads , as well as fewer tank qualifications and lower costs from assigning railcars to new lessees . depreciation expense increased $ 9.1 million due to railcar investments and the purchase of railcars previously on operating leases . operating lease expense decreased $ 11.1 million , resulting from the purchase of railcars previously on operating leases . other operating expense decreased $ 1.4 million , due to lower switching , storage , and freight costs , reflective of lower assignment activity . other income ( expense ) in 2019 , net gain on asset dispositions decreased $ 21.7 million , resulting from lower asset remarketing gains and lower net scrapping gains . net scrapping gains were lower in the current year due to certain railcars and locomotives scrapped at a loss , as well as lower scrap prices per ton . see `` note 23 . financial data of business segments `` , item 8 of this form 10-k , for further details of the components of net gain on asset dispositions . the amount and timing of disposition gains is dependent on a number of factors and will vary from year to year . net interest expense increased $ 9.3 million , driven by a higher average debt balance and a higher average interest rate . in 2018 , net gain on asset dispositions increased $ 31.1 million , attributable to more railcars sold in 2018 , as well as higher scrapping gains resulting primarily from a higher scrap price per ton . net interest expense increased $ 4.0 million , driven by a higher average interest rate and a higher average debt balance . investment volume during 2019 , investment volume was $ 502.2 million compared to $ 737.4 million in 2018 , and $ 460.9 million in 2017 . we acquired 3,225 railcars in 2019 , compared to 7,489 railcars , including 2,832 railcars purchased as part of the ecn capital corporation transaction in 2018 , and 3,613 railcars in 2017 . our investment volume is predominantly composed of acquired railcars , but also includes certain capitalized repairs and improvements to owned railcars and our maintenance facilities . as a result , the dollar value of investment volume does not necessarily correspond to the number of railcars acquired in any given period . in addition , the comparability of amounts invested and the number of railcars acquired in each period is impacted by the mix of railcars purchased , which may include tank cars and freight cars , as well as newly manufactured railcars or those purchased in the secondary market . story_separator_special_tag revenues in 2019 , lease revenue was comparable to the same period in 2018. marine operating revenue decreased $ 6.1 million , due to lower revenue from the specialized gas vessels . in 2019 , utilization of the vessels was lower due to idle time associated with the transition to a new commercial manager , as discussed previously . in 2018 , lease revenue decreased $ 2.8 million , primarily due to the impact of the sales of assets in 2017. marine operating revenue decreased $ 10.7 million , largely due to lower revenue from the specialized gas vessels and the absence of revenue from the marine assets that were sold in 2017. the revenue from the specialized gas vessels declined due to continued pressure on charter rates and lower utilization , resulting from weak demand and oversupply of vessels in the market . expenses in 2019 , marine operating expense increased $ 2.1 million . this increase was driven by the write-off of residual net assets as part of the wind-up of activities under the prior commercial management pooling agreement , partially offset by lower expenses from the specialized gas vessels . 36 in 2018 , marine operating expense decreased $ 8.0 million , primarily due to the absence of the marine assets that were sold in 2017 , as well as lower expenses from the specialized gas vessels , which included higher dry-docking costs in the prior year . other income ( expense ) in 2019 , net loss on asset dispositions increased $ 1.3 million , largely due to higher impairment losses for certain offshore supply vessels , partially offset by higher residual sharing fees from the managed portfolio . in 2018 , net gain ( loss ) on asset dispositions decreased $ 11.1 million . net gains of approximately $ 1.8 million were recorded in 2017 associated with the planned exit of marine investments . excluding this item , net gain ( loss ) on asset dispositions decreased $ 9.3 million due to lower residual sharing fees from the managed portfolio , as well as well as higher impairment losses for certain offshore supply vessels . in 2019 , income from our share of affiliates ' earnings increased $ 34.0 million . the increase was due to more engines on lease and increased residual realization at the rrpf affiliates . in 2018 , income from our share of affiliates ' earnings increased $ 2.1 million , primarily from earnings at the rrpf affiliates due to higher operating income , driven by engines added to the fleet in 2018 , partially offset by lower net disposition gains on engines sold . investment volume portfolio management did not make any investments in 2019. investment volume of $ 14.1 million in 2018 and $ 36.6 million in 2017 consisted primarily of equity investments in the rrpf affiliates . asc segment summary asc generated strong operating results in 2019 , driven by increased operational efficiency and favorable operating conditions . asc deployed 11 vessels , carrying 27.0 million net tons of freight in 2019 compared to 11 vessels carrying 26.2 million net tons in 2018 and 12 vessels carrying 27.8 million net tons in 2017. in 2019 , one of asc 's vessels was heavily damaged by fire during winter maintenance . as a result , the vessel was removed from service and written off . upon final assessment of the damage , the vessel was deemed a total loss , and insurance proceeds of $ 27.0 million were received , resulting in a net casualty gain of $ 10.5 million . during 2017 , asc sold three of its vessels for total proceeds of $ 8.3 million , resulting in a net loss of $ 1.8 million . in addition , asc returned two leased vessels . on february 7 , 2020 , we entered into an agreement to sell asc . the sale is subject to customary closing conditions . see `` note 25 . subsequent events `` in part ii , item 8 of this form 10-k for additional information . 37 the following table shows asc 's segment results for the years ended december 31 ( in millions ) : replace_table_token_17_th 38 segment profit in 2019 , segment profit was $ 46.1 million , compared to $ 33.0 million in 2018 . segment profit in 2019 included a net casualty gain of $ 10.5 million , as noted above . excluding this item , results for asc were $ 2.6 million higher than 2018. the increase was driven by higher volume and more efficient fleet performance as a result of favorable operating conditions . in 2018 , segment profit was $ 33.0 million , compared to $ 24.5 million in 2017. in 2018 , higher rates , favorable operating conditions , and efficient fleet performance more than offset lower volume . revenues in 2019 , marine operating revenue increased $ 5.8 million , or 3.2 % , primarily due to higher volume resulting from improved sailing conditions , partially offset by lower fuel revenue . the terms of our contracts provide that a substantial portion of fuel costs is passed on to customers . therefore , the variance in fuel revenue is offset by a corresponding variance in marine operating expense . in 2018 , marine operating revenue increased $ 13.3 million , or 7.9 % , primarily due to higher rates and late 2017 sailing season surcharges realized in 2018. higher fuel revenue , which is offset in marine operating expense , also contributed to the variance . expenses in 2019 , maintenance expense increased $ 1.9 million , driven by more winter work and higher operating repairs , partially offset by lower fuel costs . marine operating expense was comparable to the prior year . in 2018 , maintenance expense was comparable to the prior year . marine operating expense increased $ 7.9 million , largely driven by higher fuel costs , partially offset

debt total debt increased $ 255.7 million from the prior year . issuances of long-term debt of $ 748.5 million were offset by maturities and principal payments of $ 504.6 million and the effects of foreign exchange on foreign debt balances . the following table shows the details of our long-term debt issuances in 2019 ( $ in millions ) : replace_table_token_21_th ( 1 ) floating interest rate at december 31 , 2019 . as of december 31 , 2019 , our outstanding debt had a weighted-average remaining term of 8.7 years and a weighted-average interest rate of 4.08 % , compared to 8.9 years and 4.01 % at december 31 , 2018. the following table shows the carrying value of our debt and lease obligations by major component , including off-balance sheet debt , as of december 31 ( in millions ) : replace_table_token_22_th ( 1 ) prior to 2019 , off-balance sheet debt represented the estimated present value of committed operating lease payments for certain railcars that have been financed through sale-leasebacks and was equal to the amount reported as off-balance sheet assets . in accordance with the new lease accounting standard , we no longer have any assets that qualify as off-balance sheet assets beginning in 2019. the adoption of this new standard required us to recognize operating lease liabilities on our balance sheet . see “ non-gaap financial measures ” at the end of this item . 42 see `` note 7 . debt `` in part ii , item 8 of this form 10-k. equity total equity increased $ 47.0 million in 2019 , primarily due to net income of $ 211.2 million , $ 39.4 million from the impact of adoption of new accounting standards as of january 1 , 2019 , $ 13.7 million from the effects of share-based compensation , $ 7.2 million from the effects of post-retirement benefit plan adjustments , and $ 3.9 million of net unrealized gains on derivatives .


 Write a concise suspicious activity report of the following text delimited by triple backquotes. Return your response as a formal report which covers the key points highlighting the location,dates,entity names and account holder information in chronological order of the text.
     ```debt total debt increased $ 255.7 million from the prior year . issuances of long-term debt of $ 748.5 million were offset by maturities and principal payments of $ 504.6 million and the effects of foreign exchange on foreign debt balances . the following table shows the details of our long-term debt issuances in 2019 ( $ in millions ) : replace_table_token_21_th ( 1 ) floating interest rate at december 31 , 2019 . as of december 31 , 2019 , our outstanding debt had a weighted-average remaining term of 8.7 years and a weighted-average interest rate of 4.08 % , compared to 8.9 years and 4.01 % at december 31 , 2018. the following table shows the carrying value of our debt and lease obligations by major component , including off-balance sheet debt , as of december 31 ( in millions ) : replace_table_token_22_th ( 1 ) prior to 2019 , off-balance sheet debt represented the estimated present value of committed operating lease payments for certain railcars that have been financed through sale-leasebacks and was equal to the amount reported as off-balance sheet assets . in accordance with the new lease accounting standard , we no longer have any assets that qualify as off-balance sheet assets beginning in 2019. the adoption of this new standard required us to recognize operating lease liabilities on our balance sheet . see “ non-gaap financial measures ” at the end of this item . 42 see `` note 7 . debt `` in part ii , item 8 of this form 10-k. equity total equity increased $ 47.0 million in 2019 , primarily due to net income of $ 211.2 million , $ 39.4 million from the impact of adoption of new accounting standards as of january 1 , 2019 , $ 13.7 million from the effects of share-based compensation , $ 7.2 million from the effects of post-retirement benefit plan adjustments , and $ 3.9 million of net unrealized gains on derivatives .
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 Suspicious Activity Report : the average renewal lease term is reported in months and reflects the average renewal lease term of railcar types in the lpi , weighted by fleet composition . 27 rail north america fleet data the following table shows fleet activity for rail north america railcars , excluding boxcars , for the years ended december 31 : replace_table_token_9_th 28 the following table shows fleet statistics for rail north america boxcars for the years ended december 31 : replace_table_token_10_th the following table shows fleet activity for rail north america locomotives for the years ended december 31 : replace_table_token_11_th segment profit in 2019 , segment profit of $ 276.2 million decreased 10.3 % compared to $ 307.9 million in 2018 . the decrease was driven by lower net gains on asset dispositions , higher maintenance expense , and lower lease revenue , partially offset by higher other revenue . asset remarketing income is dependent on a number of factors and will vary from year to year . in 2018 , segment profit of $ 307.9 million increased 2.9 % compared to $ 299.3 million in 2017. the increase was driven by higher asset disposition gains and lower maintenance expense , partially offset by lower lease revenue and lower lease termination fees . 29 revenues in 2019 , lease revenue decreased $ 5.1 million , or 0.6 % . the decrease was due to lower lease rates , higher rental abatement attributable to more railcars in the maintenance network , and fewer locomotives on lease in the current year , partially offset by more railcars on lease . other revenue increased $ 28.1 million , due to higher repair revenue and higher lease termination fees in 2019. in 2018 , lease revenue decreased $ 26.5 million , or 2.9 % , primarily due to lower lease rates and fewer railcars on lease . other revenue decreased $ 9.4 million , largely a result of lower lease termination fees in 2018. other revenue in 2017 included $ 7.8 million as compensation for damage to returned railcars . the expenses to repair these railcars were recognized as incurred . expenses in 2019 , maintenance expense increased $ 13.2 million , driven by more tank qualifications in 2019 , as expected , as well as higher repairs performed by the railroads on gatx-owned railcars . depreciation expense increased $ 8.4 million due to new railcar investments , including the railcars acquired from ecn capital corporation in 2018. operating lease expense increased $ 4.8 million , primarily a result of the elimination of deferred gain amortization for sale-leaseback transactions in accordance with the new lease accounting standard . see `` note 2 . accounting changes `` and `` note 5 . leases `` in part ii , item 8 of this form 10-k for further detail regarding the impact of the new lease accounting standard . other operating expense decreased $ 3.4 million , primarily due to lower switching , storage , and freight costs as a result of continued high utilization . in 2018 , maintenance expense decreased $ 10.3 million , driven by fewer repairs performed by the railroads , as well as fewer tank qualifications and lower costs from assigning railcars to new lessees . depreciation expense increased $ 9.1 million due to railcar investments and the purchase of railcars previously on operating leases . operating lease expense decreased $ 11.1 million , resulting from the purchase of railcars previously on operating leases . other operating expense decreased $ 1.4 million , due to lower switching , storage , and freight costs , reflective of lower assignment activity . other income ( expense ) in 2019 , net gain on asset dispositions decreased $ 21.7 million , resulting from lower asset remarketing gains and lower net scrapping gains . net scrapping gains were lower in the current year due to certain railcars and locomotives scrapped at a loss , as well as lower scrap prices per ton . see `` note 23 . financial data of business segments `` , item 8 of this form 10-k , for further details of the components of net gain on asset dispositions . the amount and timing of disposition gains is dependent on a number of factors and will vary from year to year . net interest expense increased $ 9.3 million , driven by a higher average debt balance and a higher average interest rate . in 2018 , net gain on asset dispositions increased $ 31.1 million , attributable to more railcars sold in 2018 , as well as higher scrapping gains resulting primarily from a higher scrap price per ton . net interest expense increased $ 4.0 million , driven by a higher average interest rate and a higher average debt balance . investment volume during 2019 , investment volume was $ 502.2 million compared to $ 737.4 million in 2018 , and $ 460.9 million in 2017 . we acquired 3,225 railcars in 2019 , compared to 7,489 railcars , including 2,832 railcars purchased as part of the ecn capital corporation transaction in 2018 , and 3,613 railcars in 2017 . our investment volume is predominantly composed of acquired railcars , but also includes certain capitalized repairs and improvements to owned railcars and our maintenance facilities . as a result , the dollar value of investment volume does not necessarily correspond to the number of railcars acquired in any given period . in addition , the comparability of amounts invested and the number of railcars acquired in each period is impacted by the mix of railcars purchased , which may include tank cars and freight cars , as well as newly manufactured railcars or those purchased in the secondary market . story_separator_special_tag revenues in 2019 , lease revenue was comparable to the same period in 2018. marine operating revenue decreased $ 6.1 million , due to lower revenue from the specialized gas vessels . in 2019 , utilization of the vessels was lower due to idle time associated with the transition to a new commercial manager , as discussed previously . in 2018 , lease revenue decreased $ 2.8 million , primarily due to the impact of the sales of assets in 2017. marine operating revenue decreased $ 10.7 million , largely due to lower revenue from the specialized gas vessels and the absence of revenue from the marine assets that were sold in 2017. the revenue from the specialized gas vessels declined due to continued pressure on charter rates and lower utilization , resulting from weak demand and oversupply of vessels in the market . expenses in 2019 , marine operating expense increased $ 2.1 million . this increase was driven by the write-off of residual net assets as part of the wind-up of activities under the prior commercial management pooling agreement , partially offset by lower expenses from the specialized gas vessels . 36 in 2018 , marine operating expense decreased $ 8.0 million , primarily due to the absence of the marine assets that were sold in 2017 , as well as lower expenses from the specialized gas vessels , which included higher dry-docking costs in the prior year . other income ( expense ) in 2019 , net loss on asset dispositions increased $ 1.3 million , largely due to higher impairment losses for certain offshore supply vessels , partially offset by higher residual sharing fees from the managed portfolio . in 2018 , net gain ( loss ) on asset dispositions decreased $ 11.1 million . net gains of approximately $ 1.8 million were recorded in 2017 associated with the planned exit of marine investments . excluding this item , net gain ( loss ) on asset dispositions decreased $ 9.3 million due to lower residual sharing fees from the managed portfolio , as well as well as higher impairment losses for certain offshore supply vessels . in 2019 , income from our share of affiliates ' earnings increased $ 34.0 million . the increase was due to more engines on lease and increased residual realization at the rrpf affiliates . in 2018 , income from our share of affiliates ' earnings increased $ 2.1 million , primarily from earnings at the rrpf affiliates due to higher operating income , driven by engines added to the fleet in 2018 , partially offset by lower net disposition gains on engines sold . investment volume portfolio management did not make any investments in 2019. investment volume of $ 14.1 million in 2018 and $ 36.6 million in 2017 consisted primarily of equity investments in the rrpf affiliates . asc segment summary asc generated strong operating results in 2019 , driven by increased operational efficiency and favorable operating conditions . asc deployed 11 vessels , carrying 27.0 million net tons of freight in 2019 compared to 11 vessels carrying 26.2 million net tons in 2018 and 12 vessels carrying 27.8 million net tons in 2017. in 2019 , one of asc 's vessels was heavily damaged by fire during winter maintenance . as a result , the vessel was removed from service and written off . upon final assessment of the damage , the vessel was deemed a total loss , and insurance proceeds of $ 27.0 million were received , resulting in a net casualty gain of $ 10.5 million . during 2017 , asc sold three of its vessels for total proceeds of $ 8.3 million , resulting in a net loss of $ 1.8 million . in addition , asc returned two leased vessels . on february 7 , 2020 , we entered into an agreement to sell asc . the sale is subject to customary closing conditions . see `` note 25 . subsequent events `` in part ii , item 8 of this form 10-k for additional information . 37 the following table shows asc 's segment results for the years ended december 31 ( in millions ) : replace_table_token_17_th 38 segment profit in 2019 , segment profit was $ 46.1 million , compared to $ 33.0 million in 2018 . segment profit in 2019 included a net casualty gain of $ 10.5 million , as noted above . excluding this item , results for asc were $ 2.6 million higher than 2018. the increase was driven by higher volume and more efficient fleet performance as a result of favorable operating conditions . in 2018 , segment profit was $ 33.0 million , compared to $ 24.5 million in 2017. in 2018 , higher rates , favorable operating conditions , and efficient fleet performance more than offset lower volume . revenues in 2019 , marine operating revenue increased $ 5.8 million , or 3.2 % , primarily due to higher volume resulting from improved sailing conditions , partially offset by lower fuel revenue . the terms of our contracts provide that a substantial portion of fuel costs is passed on to customers . therefore , the variance in fuel revenue is offset by a corresponding variance in marine operating expense . in 2018 , marine operating revenue increased $ 13.3 million , or 7.9 % , primarily due to higher rates and late 2017 sailing season surcharges realized in 2018. higher fuel revenue , which is offset in marine operating expense , also contributed to the variance . expenses in 2019 , maintenance expense increased $ 1.9 million , driven by more winter work and higher operating repairs , partially offset by lower fuel costs . marine operating expense was comparable to the prior year . in 2018 , maintenance expense was comparable to the prior year . marine operating expense increased $ 7.9 million , largely driven by higher fuel costs , partially offset

