these purchases are necessary because large portions of our members ' loads in nebraska are located in the eastern interconnection and are generally isolated from our facilities that are located in the western interconnection . these long‑term purchase commitments represent a majority of our electric power purchases . at the same time , we have agreed to supply electric power to non‑members . in addition , we utilize market purchases to optimize our position by routinely purchasing power when the market price is lower than our incremental production cost and routinely selling power to the short‑term market when we have excess power available above our firm commitments to both members and non‑members . we also use short-term energy purchases during periods of generation outages at our facilities . 2016 developments kcec withdrawal . on june 30 , 2016 , kcec withdrew from membership in us pursuant to the withdrawal agreement . the withdrawal agreement provided for the termination of the wholesale electric service contract between us and kcec that extended through 2040 and the withdrawal of kcec from membership in us . as part of the withdrawal agreement , we received $ 37 million net cash , which consisted of $ 49.5 million as an early termination fee for withdrawing from membership in us offset by $ 12.5 million for the retirement of kcec 's patronage capital . this resulted in $ 47.6 million in other income , which was deferred by our board , and is recorded in deferred credits and other liabilities on the statement of financial position . for each of the fiscal years ending in 2015 , 2014 , and 2013 and the six months ended june 30 , 2016 , kcec constituted an average of approximately 2 percent of our revenue from member sales . generating station retirements . on september 1 , 2016 , we announced that the owners of craig station unit 1 reached an agreement with the colorado department of public health and environment , epa , wildearth guardians and the national parks conservation association to revise the colorado visibility and regional haze state implementation plan . under the proposed revision to the sip , the owners of craig station unit 1 intend to retire craig station unit 1 by december 31 , 2025. the retirement date was previously estimated to be december 31 , 2051. we are the operator of craig station and own 24 percent of craig station unit 1. craig station unit 2 and unit 3 will continue to operate . our share of craig station unit 1 is 102 megawatts with a net book value of $ 28.9 million as of december 31 , 2016. the shortened life increased depreciation expense in the amount of $ 0.8 million for the period september 1 , 2016 through december 31 , 2016. as part of the above mentioned agreement on proposed revisions to the sip , as previously disclosed , we intend to retire the nucla generating station by december 31 , 2022. the retirement date was previously estimated to be december 31 , 2049. we are the operator and sole owner of nucla generating station with a net book value of $ 62.6 million as of december 31 , 2016. the shortened life increased depreciation expense in the amount of $ 2.8 million for the period september 1 , 2016 through december 31 , 2016 , and increased the asset retirement obligation in the amount of $ 2.9 million as of december 31 , 2016. the new horizon mine , which supplies coal to nucla generating station , will cease coal production with the retirement of nucla generating station . reclamation efforts at the new horizon mine will continue . under the federal regional haze regulations , the state of colorado develops and implements a sip to address visibility in national parks and wilderness areas . colorado 's plan requires reductions of nox emissions from generation sources . several procedural steps are required to implement the terms of the agreement , including approval by the state legislature and the epa . critical accounting policies the preparation of our financial statements in conformity with gaap requires that our management make estimates and assumptions that affect the amounts reported in our consolidated financial statements . we base these estimates and assumptions on information available as of the date of the financial statements and they are not necessarily indicative of the results to be expected for the year . we consider the following accounting policies to be critical accounting policies due to the estimation involved or due to the particular significance they have on our consolidated financial statements . 39 accounting for rate regulation . we are a rate-regulated entity and , as a result , are subject to the accounting requirements of accounting for regulated operations . in accordance with these accounting requirements , some revenues and expenses have been deferred at the discretion of our board , which has budgetary and rate‑setting authority , if it is probable that these amounts will be refunded or recovered through future rates . regulatory assets are costs we expect to recover from members based on rates approved by our board in accordance with our rate policy . regulatory liabilities represent probable future reductions in rates associated with amounts that are expected to be refunded to members based on rates approved by our board in accordance with our rate policy . we recognize regulatory assets and liabilities as expenses or as a reduction in expenses concurrent with their recovery in rates . leases . the accounting for lease transactions in conformity with gaap requires management to make various assumptions , including the discount rate , the fair market value of the leased assets and the estimated useful life , in order to determine whether a lease should be classified as operating or capital . story_separator_special_tag the increase was partially offset by a decrease in long-term firm revenue of $ 4.3 million due to the expiration of several long-term power sales arrangements on december 31 , 2015 and march 31 , 2016 that were not renewed . other operating revenue consists primarily of wheeling , transmission and lease revenues , coal sales , and revenue from supplying steam and water to a paper manufacturer located adjacent to the escalante station . wheeling revenue is received when we charge other energy companies for transmitting electricity over our transmission lines . transmission revenue is from our membership in the spp , a regional transmission organization , which we joined on january 1 , 2016. the lease revenue is primarily from certain power sales arrangements that are required to be accounted for as operating leases since the arrangements are in substance leases because they convey to others the right to use power generating equipment for a stated period of time . coal sales revenue results from the sale of a portion of the coal from the colowyo mine per a contract ending in 2017 to other joint owners in the yampa project . other revenue decreased $ 2.5 million to $ 87.0 million in 2016 compared to $ 89.5 million in 2015. the decrease in other operating revenue was primarily due to a decrease in lease revenue of $ 12.6 million due to the expiration of power sales arrangements at our knutson and limon generating stations . this decrease was partially offset by a $ 7.9 million increase in transmission revenue resulting from our membership in the spp and a $ 1.1 million increase in wheeling revenue . 43 operating expenses purchased power expense increased $ 36.3 million , or 11.9 percent , to $ 341.3 million in 2016 compared to $ 305.0 million in 2015. the increase in expense was primarily due to higher renewable energy purchases resulting from two new facilities in 2016 with expense of $ 13.3 million and an increase in firm purchased power with expense of $ 28.8 million primarily due to a power sales arrangement that began in june 2016. in addition , there was also a 6.6 percent increase in the average cost per mwh of purchased power ( partially resulting from the august 2016 basin rate increase ) . fuel expense includes coal , natural gas and other fuel consumed at the generating stations . fuel expense increased $ 4.1 million to $ 235.6 million in 2016 compared to $ 231.5 million for the same period in 2015. the increase in expense was primarily due to lower coal expense in the second quarter of 2015 resulting from the one-time recognition of $ 24.4 million as a reduction to fuel expense because of the bnsf rate settlement . excluding the effect of the bnsf rate settlement , fuel expense decreased $ 20.3 million to $ 235.6 million in 2016 compared to $ 255.9 million for the same period in 2015. the decrease was primarily due to reduced coal consumption due to a decrease in generation of 587,253 mwhs , or 4.9 percent in 2016 compared to 2015. production expense decreased $ 17.4 million , or 7.4 percent , to $ 218.0 million in 2016 compared to $ 235.4 million for the same period in 2015. the decrease in expense was primarily due to a decrease in maintenance outages in 2016 ( generation maintenance expense was lower in 2016 than in 2015 due to scheduled generation maintenance expenses that occurred in 2015 at craig station and laramie river generating station ) . this decrease was partially offset by a maintenance outage at springerville unit 3 during the fourth quarter of 2016. depreciation , amortization and depletion expense increased $ 21.3 million , or 13.9 percent , to $ 174.0 million in 2016 compared to $ 152.7 million for the same period in 2015. depreciation expense increased in 2016 due to the shortened lives at three generating stations . san juan generating station unit 3 depreciation expense increased $ 3.2 million in 2016 compared to 2015 due to a shortened life associated with the anticipated december 31 , 2017 retirement date of the unit . beginning september 1 , 2016 , the nucla generating station depreciation expense increased $ 2.8 million and craig station unit 1 increased $ 0.8 million for 2016 due to the shortened lives associated with the anticipated retirement dates by december 31 , 2022 and december 31 , 2025 , respectively . the remaining increase in expense was primarily due to additions of equipment throughout our transmission system and at our generating stations . effective january 1 , 2017 , we adopted depreciation rates that reflect rates determined in a depreciation rate study completed in january 2017 for our transmission plant and most of our general plant . we expect that the new rates will result in a reduction in 2017 depreciation expense of approximately $ 21.0 million . it is also anticipated that a depreciation rate study will be performed and completed during 2017 for most of our generation plant and that these rates will be adopted prospectively in 2017 from the date the study is completed . we do not currently know what the impact of this study will be on our 2017 depreciation expense . other income capital credits from cooperatives increased $ 11.1 million , or 120.7 percent , to $ 20.3 million in 2016 compared to $ 9.2 million for the same period in 2015. the increase was primarily due to a patronage allocation from basin of $ 14.4 million in 2016 compared to $ 4.6 million for the same period in 2015. income taxes income taxes were $ ( 1.4 ) million in 2016 compared to $ 0 for the same period in 2015. this resulted from a $ 1.9 million alternative minimum tax credit in lieu of bonus depreciation , partially offset by the current alternative minimum tax expense of $ 0.5 million

liquidity we finance our operations , working capital needs and capital expenditures from operating revenues and issuance of debt . as of december 31 , 2016 , we had $ 165.9 million in cash and cash equivalents . our committed credit arrangement as of december 31 , 2016 is as follows ( dollars in thousands ) : available authorized december 31 , amount 2016 revolving credit agreement $ 750,000 ( 1 ) $ 582,357 ( 2 ) ( 1 ) the amount of this facility that can be used to support commercial paper is limited to $ 500 million . ( 2 ) of the portion of this facility that was unavailable at december 31 , 2016 , $ 47.7 million was related to a letter of credit issued to support variable rate demand bonds and $ 119.9 million was dedicated to support outstanding commercial paper . the revolving credit agreement has aggregate commitments of $ 750 million which includes a swingline sublimit of $ 100 million , a letter of credit sublimit of $ 200 million , and a commercial paper back-up sublimit of $ 500 million , of which $ 100 million of the swingline sublimit , $ 152 million of the letter of credit sublimit , and $ 380.1 million of the commercial paper back-up sublimit remained available as of december 31 , 2016. under our commercial paper program , which we began in may 2016 , our board authorized us to issue commercial paper in amounts that do not exceed the commercial paper back-up sublimit under our revolving credit agreement , which is the lesser of $ 500 million or the amount available under the revolving credit agreement , thereby providing 100 % dedicated support for any commercial paper outstanding .


 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.
     ```liquidity we finance our operations , working capital needs and capital expenditures from operating revenues and issuance of debt . as of december 31 , 2016 , we had $ 165.9 million in cash and cash equivalents . our committed credit arrangement as of december 31 , 2016 is as follows ( dollars in thousands ) : available authorized december 31 , amount 2016 revolving credit agreement $ 750,000 ( 1 ) $ 582,357 ( 2 ) ( 1 ) the amount of this facility that can be used to support commercial paper is limited to $ 500 million . ( 2 ) of the portion of this facility that was unavailable at december 31 , 2016 , $ 47.7 million was related to a letter of credit issued to support variable rate demand bonds and $ 119.9 million was dedicated to support outstanding commercial paper . the revolving credit agreement has aggregate commitments of $ 750 million which includes a swingline sublimit of $ 100 million , a letter of credit sublimit of $ 200 million , and a commercial paper back-up sublimit of $ 500 million , of which $ 100 million of the swingline sublimit , $ 152 million of the letter of credit sublimit , and $ 380.1 million of the commercial paper back-up sublimit remained available as of december 31 , 2016. under our commercial paper program , which we began in may 2016 , our board authorized us to issue commercial paper in amounts that do not exceed the commercial paper back-up sublimit under our revolving credit agreement , which is the lesser of $ 500 million or the amount available under the revolving credit agreement , thereby providing 100 % dedicated support for any commercial paper outstanding .
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 Suspicious Activity Report : these purchases are necessary because large portions of our members ' loads in nebraska are located in the eastern interconnection and are generally isolated from our facilities that are located in the western interconnection . these long‑term purchase commitments represent a majority of our electric power purchases . at the same time , we have agreed to supply electric power to non‑members . in addition , we utilize market purchases to optimize our position by routinely purchasing power when the market price is lower than our incremental production cost and routinely selling power to the short‑term market when we have excess power available above our firm commitments to both members and non‑members . we also use short-term energy purchases during periods of generation outages at our facilities . 2016 developments kcec withdrawal . on june 30 , 2016 , kcec withdrew from membership in us pursuant to the withdrawal agreement . the withdrawal agreement provided for the termination of the wholesale electric service contract between us and kcec that extended through 2040 and the withdrawal of kcec from membership in us . as part of the withdrawal agreement , we received $ 37 million net cash , which consisted of $ 49.5 million as an early termination fee for withdrawing from membership in us offset by $ 12.5 million for the retirement of kcec 's patronage capital . this resulted in $ 47.6 million in other income , which was deferred by our board , and is recorded in deferred credits and other liabilities on the statement of financial position . for each of the fiscal years ending in 2015 , 2014 , and 2013 and the six months ended june 30 , 2016 , kcec constituted an average of approximately 2 percent of our revenue from member sales . generating station retirements . on september 1 , 2016 , we announced that the owners of craig station unit 1 reached an agreement with the colorado department of public health and environment , epa , wildearth guardians and the national parks conservation association to revise the colorado visibility and regional haze state implementation plan . under the proposed revision to the sip , the owners of craig station unit 1 intend to retire craig station unit 1 by december 31 , 2025. the retirement date was previously estimated to be december 31 , 2051. we are the operator of craig station and own 24 percent of craig station unit 1. craig station unit 2 and unit 3 will continue to operate . our share of craig station unit 1 is 102 megawatts with a net book value of $ 28.9 million as of december 31 , 2016. the shortened life increased depreciation expense in the amount of $ 0.8 million for the period september 1 , 2016 through december 31 , 2016. as part of the above mentioned agreement on proposed revisions to the sip , as previously disclosed , we intend to retire the nucla generating station by december 31 , 2022. the retirement date was previously estimated to be december 31 , 2049. we are the operator and sole owner of nucla generating station with a net book value of $ 62.6 million as of december 31 , 2016. the shortened life increased depreciation expense in the amount of $ 2.8 million for the period september 1 , 2016 through december 31 , 2016 , and increased the asset retirement obligation in the amount of $ 2.9 million as of december 31 , 2016. the new horizon mine , which supplies coal to nucla generating station , will cease coal production with the retirement of nucla generating station . reclamation efforts at the new horizon mine will continue . under the federal regional haze regulations , the state of colorado develops and implements a sip to address visibility in national parks and wilderness areas . colorado 's plan requires reductions of nox emissions from generation sources . several procedural steps are required to implement the terms of the agreement , including approval by the state legislature and the epa . critical accounting policies the preparation of our financial statements in conformity with gaap requires that our management make estimates and assumptions that affect the amounts reported in our consolidated financial statements . we base these estimates and assumptions on information available as of the date of the financial statements and they are not necessarily indicative of the results to be expected for the year . we consider the following accounting policies to be critical accounting policies due to the estimation involved or due to the particular significance they have on our consolidated financial statements . 39 accounting for rate regulation . we are a rate-regulated entity and , as a result , are subject to the accounting requirements of accounting for regulated operations . in accordance with these accounting requirements , some revenues and expenses have been deferred at the discretion of our board , which has budgetary and rate‑setting authority , if it is probable that these amounts will be refunded or recovered through future rates . regulatory assets are costs we expect to recover from members based on rates approved by our board in accordance with our rate policy . regulatory liabilities represent probable future reductions in rates associated with amounts that are expected to be refunded to members based on rates approved by our board in accordance with our rate policy . we recognize regulatory assets and liabilities as expenses or as a reduction in expenses concurrent with their recovery in rates . leases . the accounting for lease transactions in conformity with gaap requires management to make various assumptions , including the discount rate , the fair market value of the leased assets and the estimated useful life , in order to determine whether a lease should be classified as operating or capital . story_separator_special_tag the increase was partially offset by a decrease in long-term firm revenue of $ 4.3 million due to the expiration of several long-term power sales arrangements on december 31 , 2015 and march 31 , 2016 that were not renewed . other operating revenue consists primarily of wheeling , transmission and lease revenues , coal sales , and revenue from supplying steam and water to a paper manufacturer located adjacent to the escalante station . wheeling revenue is received when we charge other energy companies for transmitting electricity over our transmission lines . transmission revenue is from our membership in the spp , a regional transmission organization , which we joined on january 1 , 2016. the lease revenue is primarily from certain power sales arrangements that are required to be accounted for as operating leases since the arrangements are in substance leases because they convey to others the right to use power generating equipment for a stated period of time . coal sales revenue results from the sale of a portion of the coal from the colowyo mine per a contract ending in 2017 to other joint owners in the yampa project . other revenue decreased $ 2.5 million to $ 87.0 million in 2016 compared to $ 89.5 million in 2015. the decrease in other operating revenue was primarily due to a decrease in lease revenue of $ 12.6 million due to the expiration of power sales arrangements at our knutson and limon generating stations . this decrease was partially offset by a $ 7.9 million increase in transmission revenue resulting from our membership in the spp and a $ 1.1 million increase in wheeling revenue . 43 operating expenses purchased power expense increased $ 36.3 million , or 11.9 percent , to $ 341.3 million in 2016 compared to $ 305.0 million in 2015. the increase in expense was primarily due to higher renewable energy purchases resulting from two new facilities in 2016 with expense of $ 13.3 million and an increase in firm purchased power with expense of $ 28.8 million primarily due to a power sales arrangement that began in june 2016. in addition , there was also a 6.6 percent increase in the average cost per mwh of purchased power ( partially resulting from the august 2016 basin rate increase ) . fuel expense includes coal , natural gas and other fuel consumed at the generating stations . fuel expense increased $ 4.1 million to $ 235.6 million in 2016 compared to $ 231.5 million for the same period in 2015. the increase in expense was primarily due to lower coal expense in the second quarter of 2015 resulting from the one-time recognition of $ 24.4 million as a reduction to fuel expense because of the bnsf rate settlement . excluding the effect of the bnsf rate settlement , fuel expense decreased $ 20.3 million to $ 235.6 million in 2016 compared to $ 255.9 million for the same period in 2015. the decrease was primarily due to reduced coal consumption due to a decrease in generation of 587,253 mwhs , or 4.9 percent in 2016 compared to 2015. production expense decreased $ 17.4 million , or 7.4 percent , to $ 218.0 million in 2016 compared to $ 235.4 million for the same period in 2015. the decrease in expense was primarily due to a decrease in maintenance outages in 2016 ( generation maintenance expense was lower in 2016 than in 2015 due to scheduled generation maintenance expenses that occurred in 2015 at craig station and laramie river generating station ) . this decrease was partially offset by a maintenance outage at springerville unit 3 during the fourth quarter of 2016. depreciation , amortization and depletion expense increased $ 21.3 million , or 13.9 percent , to $ 174.0 million in 2016 compared to $ 152.7 million for the same period in 2015. depreciation expense increased in 2016 due to the shortened lives at three generating stations . san juan generating station unit 3 depreciation expense increased $ 3.2 million in 2016 compared to 2015 due to a shortened life associated with the anticipated december 31 , 2017 retirement date of the unit . beginning september 1 , 2016 , the nucla generating station depreciation expense increased $ 2.8 million and craig station unit 1 increased $ 0.8 million for 2016 due to the shortened lives associated with the anticipated retirement dates by december 31 , 2022 and december 31 , 2025 , respectively . the remaining increase in expense was primarily due to additions of equipment throughout our transmission system and at our generating stations . effective january 1 , 2017 , we adopted depreciation rates that reflect rates determined in a depreciation rate study completed in january 2017 for our transmission plant and most of our general plant . we expect that the new rates will result in a reduction in 2017 depreciation expense of approximately $ 21.0 million . it is also anticipated that a depreciation rate study will be performed and completed during 2017 for most of our generation plant and that these rates will be adopted prospectively in 2017 from the date the study is completed . we do not currently know what the impact of this study will be on our 2017 depreciation expense . other income capital credits from cooperatives increased $ 11.1 million , or 120.7 percent , to $ 20.3 million in 2016 compared to $ 9.2 million for the same period in 2015. the increase was primarily due to a patronage allocation from basin of $ 14.4 million in 2016 compared to $ 4.6 million for the same period in 2015. income taxes income taxes were $ ( 1.4 ) million in 2016 compared to $ 0 for the same period in 2015. this resulted from a $ 1.9 million alternative minimum tax credit in lieu of bonus depreciation , partially offset by the current alternative minimum tax expense of $ 0.5 million

