the proposed separation , which is intended to be a tax-free spinoff to our stockholders , is expected to be completed in the second half of 2016. upon completion of the separation , chris hylen , who currently serves as our senior vice president and general manager of our mobility apps business unit , will serve as chief executive officer of the new spinoff company . the proposed spinoff is subject to customary closing conditions and final approval by our board of directors . we expect to incur significant costs in connection with our planned separation of our goto business . these costs relate primarily to third-party advisory and consulting services , retention payments to certain employees , incremental stock-based compensation and other costs directly related to the separation . costs related to employees for retention or stock-based compensation are classified on a basis consistent with their regular compensation charges and included within cost of net revenues , research and development , sales , marketing and services , or general and administrative expense in our consolidated statements of income as applicable . costs other than those paid to employees are included within general and administrative expense in our consolidated statements of income . during 2015 , we incurred approximately $ 6.4 million related to separation costs . we expect to incur additional separation costs in 2016 until we complete the separation of our goto business . we currently expect to record in the aggregate approximately $ 100.0 million to $ 110.0 million in separation costs , although that estimate is subject to a number of assumptions and uncertainties . 33 further , we also announced the implementation of a restructuring program that will focus on simplification of our enterprise go-to-market motion and roles while improving coverage , reflect changes in our product focus , and balance resources with demand across our marketing , general and administration areas . the 2015 other restructuring program calls for the elimination of approximately 700 full-time positions , of which 350 were communicated in 2015. during the year ended december 31 , 2015 , we incurred costs of $ 29.7 million primarily related to employee severance arrangements . we currently expect to record in the aggregate approximately $ 55.0 million to $ 60.0 million in pre-tax restructuring charges associated with this program . the majority of these charges are related to employee severance , outplacement , professional service fees , and facility closing costs . we currently anticipate completing the activities related to the 2015 other restructuring program during the first half of fiscal year 2016. in october 2015 , we announced that mark b. templeton retired as our chief executive officer and president and as a member of the board of directors , and that robert m. calderoni , our executive chairman , was appointed interim chief executive officer and president . in january 2016 , we announced that kirill tatarinov has been appointed president and chief executive officer , effective january 25 , 2016. mr. tatarinov also joined our board of directors as a director at that time . mr. calderoni , will continue his role as executive chairman on our board of directors , focused on driving execution of our strategic plan , including operational efficiency , capital structure and portfolio simplification . summary of results for the year ended december 31 , 2015 compared to the year ended december 31 , 2014 , we delivered the following financial performance : product and license revenue decreased ( 2.7 ) % to $ 875.8 million ; software as a service revenue increased 12.2 % to $ 731.3 million ; license updates and maintenance revenue increased 7.4 % to $ 1.5 billion ; professional services revenue decreased ( 16.0 ) % to $ 147.5 million ; gross margin as a percentage of revenue increased 0.9 % to 81.2 % ; operating income increased 15.8 % to $ 350.1 million ; and diluted earnings per share increased 35.4 % to $ 1.99 . the decrease in our product and licenses revenue was primarily driven by lower sales of our workspace services solutions and certain delivery networking products , primarily bytemobile smart capacity and cloudbridge , partially offset by an increase in sales of netscaler . our software as a service revenues increased due to increased sales of our communications cloud products , led by gotomeeting and grasshopper , and our workflow cloud products , primarily sharefile . the increase in license updates and maintenance revenue was primarily due to increased sales of maintenance revenues across our workspace services and delivery networking products , partially offset by a decrease in our subscription advantage product . the decrease in professional services revenue was primarily due to decreased product training and certification and implementation services related to our workspace services products . we currently target total revenue to increase when comparing the first quarter of 2016 to the first quarter of 2015. in addition , when comparing the 2016 fiscal year to the 2015 fiscal year , we target total revenue to increase . the increase in 2015 in gross margin as a percentage of net revenue was not significant . the increase in operating income and diluted earnings per share when comparing the 2015 to 2014 was primarily due to an increase in revenues and gross margin . in addition , 2014 included a charge related to a patent lawsuit , partially offset by higher charges incurred related to our restructuring programs . when comparing the first quarter of 2016 to the fourth quarter of 2015 , we are targeting operating margin as a percentage of revenue to increase due to the strategic initiatives discussed above . also contributing to the increase in diluted earnings per share was a decrease in our effective tax rate and the impact of share repurchases during 2015 , which reduced our weighted-average shares outstanding . story_separator_special_tag the degree to which management 's estimation and judgment is required is generally dependent upon the market pricing available for the investments , the availability of observable inputs , the frequency of trading in the investments and the investment 's complexity . if we make different judgments regarding unobservable inputs we could potentially reach different conclusions regarding the fair value of our investments . after we have determined the fair value of our investments , for those that are in an unrealized loss position , we must then determine if the investment is other-than-temporarily impaired . we review our investments quarterly for indicators of other-than-temporary impairment . this determination requires significant judgment and if different judgments are used the classification of the losses related to our investments could differ . in making this judgment , we employ a systematic methodology that considers available quantitative and qualitative evidence in evaluating potential impairment of our investments . if the carrying value of an available-for-sale investment exceeds its fair value , we evaluate , among other factors , general market conditions , the duration and extent to which the fair value is less than carrying value our intent to retain or sell the investment and whether it is more likely than not that we will not be required to sell the investment before the recovery of its amortized cost basis , which may not be until maturity . we also consider specific adverse conditions related to the financial health of and business outlook for the issuer , including industry and sector performance , rating agency actions and changes in credit default swap levels . for our cost method investments , our quarterly review of impairment indicators encompasses the analysis of specific criteria of the entity , such as cash position , financing needs , operational performance , management changes , competition and turnaround potential . if any of the above impairment indicators are present , we further evaluate whether an other-than-temporary impairment should be recorded . once a decline in fair value is determined to be other-than-temporary , an impairment charge is recorded and a new cost basis in the investment is established . see notes 4 and 5 to our consolidated financial statements included in this annual report on form 10-k for the year ended december 31 , 2015 and “ liquidity and capital resources ” for more information on our investments and fair value measurements . intangible assets we have acquired product related technology assets and other intangible assets from acquisitions and other third party agreements . we allocate the purchase price of acquired intangible assets acquired through third party agreements based on their estimated relative fair values . we allocate a portion of purchase price of acquired companies to the product related technology assets and other intangible assets acquired based on their estimated fair values . we typically engage third party appraisal firms to assist us in determining the fair values and useful lives of product related technology assets and other intangible assets acquired . such valuations and useful life determinations require us to make significant estimates and assumptions . these estimates are based on historical experience and information obtained from the management of the acquired companies and are inherently uncertain . critical estimates in determining the fair value and useful lives of the product related technology assets include but are not limited to future expected cash flows earned from the product related technology and discount rates applied in determining the present value of those cash flows . critical estimates in valuing certain other intangible assets include but are not limited to future expected cash flows from customer contracts , customer lists , distribution agreements , patents , brand awareness and market position , as well as discount rates . management 's estimates of fair value are based upon assumptions believed to be reasonable . unanticipated events and circumstances may occur which may affect the accuracy or validity of such assumptions , estimates or actual results . we monitor acquired intangible assets for impairment on a periodic basis by reviewing for indicators of impairment . if an indicator exists we compare the estimated net realizable value to the unamortized cost of the intangible asset . the recoverability of the intangible assets is primarily dependent upon our ability to commercialize products utilizing the acquired technologies , retain existing customers and customer contracts , and maintain brand awareness . the estimated net realizable value of the acquired intangible assets is based on the estimated undiscounted future cash flows derived from such intangible assets . our assumptions about future revenues and expenses require significant judgment associated with the forecast of the performance of our products , customer retention rates and ability to secure and maintain our market position . actual revenues and costs could vary significantly from these forecasted amounts . if these products are not ultimately accepted by our customers and distributors , and there is no alternative future use for the technology ; or if we fail to retain acquired customers or 38 successfully market acquired brands , we could determine that some or all of the remaining $ 283.4 million carrying value of our acquired intangible assets is impaired . in the event of impairment , we would record an impairment charge to earnings that could have a material adverse effect on our results of operations . during the year ended december 31 , 2015 , we tested certain intangible assets for recoverability due to changes in facts and circumstances associated with the shift in strategic focus and reduced profitability expectations . as a result , we identified certain definite-lived intangible assets that were impaired within our enterprise and service provider business unit , primarily customer relationships and product technologies from the acquisition of bytemobile and sanbolic , and recorded non-cash impairment charges of $ 123.0 million to write down the intangible assets to their estimated fair value of $ 26.8 million . of the impairment charge , $ 67.1

liquidity and capital resources during 2015 , we generated operating cash flows of $ 1.03 billion . these operating cash flows related primarily to net income of $ 319.4 million , adjusted for , among other things , non-cash charges , including depreciation , amortization and impairment expenses of $ 392.9 million and an aggregate increase in operating assets and liabilities of $ 212.0 million , net of effects of acquisitions . also contributing to these cash inflows was stock-based compensation expense of $ 147.4 million . our investing activities used $ 224.4 million of cash consisting primarily of cash paid for acquisitions of $ 256.9 million and cash paid for the purchase of property and equipment of $ 160.8 million . this investing outflow was partially offset by net proceeds from investments of $ 199.5 million . our financing activities used cash of $ 691.5 million primarily due to stock repurchases of $ 755.7 million and cash paid for tax withholding on vested stock awards of $ 46.3 million . this financing cash outflow was 48 partially offset by proceeds from the issuance of common stock under our employee stock-based compensation plans of $ 112.3 million . during 2014 , we generated operating cash flows of $ 846.0 million . these operating cash flows related primarily to net income of $ 251.7 million , adjusted for , among other things , non-cash charges including depreciation , amortization and impairment expenses of $ 330.3 million and stock-based compensation expense of $ 169.3 million .


 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 and capital resources during 2015 , we generated operating cash flows of $ 1.03 billion . these operating cash flows related primarily to net income of $ 319.4 million , adjusted for , among other things , non-cash charges , including depreciation , amortization and impairment expenses of $ 392.9 million and an aggregate increase in operating assets and liabilities of $ 212.0 million , net of effects of acquisitions . also contributing to these cash inflows was stock-based compensation expense of $ 147.4 million . our investing activities used $ 224.4 million of cash consisting primarily of cash paid for acquisitions of $ 256.9 million and cash paid for the purchase of property and equipment of $ 160.8 million . this investing outflow was partially offset by net proceeds from investments of $ 199.5 million . our financing activities used cash of $ 691.5 million primarily due to stock repurchases of $ 755.7 million and cash paid for tax withholding on vested stock awards of $ 46.3 million . this financing cash outflow was 48 partially offset by proceeds from the issuance of common stock under our employee stock-based compensation plans of $ 112.3 million . during 2014 , we generated operating cash flows of $ 846.0 million . these operating cash flows related primarily to net income of $ 251.7 million , adjusted for , among other things , non-cash charges including depreciation , amortization and impairment expenses of $ 330.3 million and stock-based compensation expense of $ 169.3 million .
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 Suspicious Activity Report : the proposed separation , which is intended to be a tax-free spinoff to our stockholders , is expected to be completed in the second half of 2016. upon completion of the separation , chris hylen , who currently serves as our senior vice president and general manager of our mobility apps business unit , will serve as chief executive officer of the new spinoff company . the proposed spinoff is subject to customary closing conditions and final approval by our board of directors . we expect to incur significant costs in connection with our planned separation of our goto business . these costs relate primarily to third-party advisory and consulting services , retention payments to certain employees , incremental stock-based compensation and other costs directly related to the separation . costs related to employees for retention or stock-based compensation are classified on a basis consistent with their regular compensation charges and included within cost of net revenues , research and development , sales , marketing and services , or general and administrative expense in our consolidated statements of income as applicable . costs other than those paid to employees are included within general and administrative expense in our consolidated statements of income . during 2015 , we incurred approximately $ 6.4 million related to separation costs . we expect to incur additional separation costs in 2016 until we complete the separation of our goto business . we currently expect to record in the aggregate approximately $ 100.0 million to $ 110.0 million in separation costs , although that estimate is subject to a number of assumptions and uncertainties . 33 further , we also announced the implementation of a restructuring program that will focus on simplification of our enterprise go-to-market motion and roles while improving coverage , reflect changes in our product focus , and balance resources with demand across our marketing , general and administration areas . the 2015 other restructuring program calls for the elimination of approximately 700 full-time positions , of which 350 were communicated in 2015. during the year ended december 31 , 2015 , we incurred costs of $ 29.7 million primarily related to employee severance arrangements . we currently expect to record in the aggregate approximately $ 55.0 million to $ 60.0 million in pre-tax restructuring charges associated with this program . the majority of these charges are related to employee severance , outplacement , professional service fees , and facility closing costs . we currently anticipate completing the activities related to the 2015 other restructuring program during the first half of fiscal year 2016. in october 2015 , we announced that mark b. templeton retired as our chief executive officer and president and as a member of the board of directors , and that robert m. calderoni , our executive chairman , was appointed interim chief executive officer and president . in january 2016 , we announced that kirill tatarinov has been appointed president and chief executive officer , effective january 25 , 2016. mr. tatarinov also joined our board of directors as a director at that time . mr. calderoni , will continue his role as executive chairman on our board of directors , focused on driving execution of our strategic plan , including operational efficiency , capital structure and portfolio simplification . summary of results for the year ended december 31 , 2015 compared to the year ended december 31 , 2014 , we delivered the following financial performance : product and license revenue decreased ( 2.7 ) % to $ 875.8 million ; software as a service revenue increased 12.2 % to $ 731.3 million ; license updates and maintenance revenue increased 7.4 % to $ 1.5 billion ; professional services revenue decreased ( 16.0 ) % to $ 147.5 million ; gross margin as a percentage of revenue increased 0.9 % to 81.2 % ; operating income increased 15.8 % to $ 350.1 million ; and diluted earnings per share increased 35.4 % to $ 1.99 . the decrease in our product and licenses revenue was primarily driven by lower sales of our workspace services solutions and certain delivery networking products , primarily bytemobile smart capacity and cloudbridge , partially offset by an increase in sales of netscaler . our software as a service revenues increased due to increased sales of our communications cloud products , led by gotomeeting and grasshopper , and our workflow cloud products , primarily sharefile . the increase in license updates and maintenance revenue was primarily due to increased sales of maintenance revenues across our workspace services and delivery networking products , partially offset by a decrease in our subscription advantage product . the decrease in professional services revenue was primarily due to decreased product training and certification and implementation services related to our workspace services products . we currently target total revenue to increase when comparing the first quarter of 2016 to the first quarter of 2015. in addition , when comparing the 2016 fiscal year to the 2015 fiscal year , we target total revenue to increase . the increase in 2015 in gross margin as a percentage of net revenue was not significant . the increase in operating income and diluted earnings per share when comparing the 2015 to 2014 was primarily due to an increase in revenues and gross margin . in addition , 2014 included a charge related to a patent lawsuit , partially offset by higher charges incurred related to our restructuring programs . when comparing the first quarter of 2016 to the fourth quarter of 2015 , we are targeting operating margin as a percentage of revenue to increase due to the strategic initiatives discussed above . also contributing to the increase in diluted earnings per share was a decrease in our effective tax rate and the impact of share repurchases during 2015 , which reduced our weighted-average shares outstanding . story_separator_special_tag the degree to which management 's estimation and judgment is required is generally dependent upon the market pricing available for the investments , the availability of observable inputs , the frequency of trading in the investments and the investment 's complexity . if we make different judgments regarding unobservable inputs we could potentially reach different conclusions regarding the fair value of our investments . after we have determined the fair value of our investments , for those that are in an unrealized loss position , we must then determine if the investment is other-than-temporarily impaired . we review our investments quarterly for indicators of other-than-temporary impairment . this determination requires significant judgment and if different judgments are used the classification of the losses related to our investments could differ . in making this judgment , we employ a systematic methodology that considers available quantitative and qualitative evidence in evaluating potential impairment of our investments . if the carrying value of an available-for-sale investment exceeds its fair value , we evaluate , among other factors , general market conditions , the duration and extent to which the fair value is less than carrying value our intent to retain or sell the investment and whether it is more likely than not that we will not be required to sell the investment before the recovery of its amortized cost basis , which may not be until maturity . we also consider specific adverse conditions related to the financial health of and business outlook for the issuer , including industry and sector performance , rating agency actions and changes in credit default swap levels . for our cost method investments , our quarterly review of impairment indicators encompasses the analysis of specific criteria of the entity , such as cash position , financing needs , operational performance , management changes , competition and turnaround potential . if any of the above impairment indicators are present , we further evaluate whether an other-than-temporary impairment should be recorded . once a decline in fair value is determined to be other-than-temporary , an impairment charge is recorded and a new cost basis in the investment is established . see notes 4 and 5 to our consolidated financial statements included in this annual report on form 10-k for the year ended december 31 , 2015 and “ liquidity and capital resources ” for more information on our investments and fair value measurements . intangible assets we have acquired product related technology assets and other intangible assets from acquisitions and other third party agreements . we allocate the purchase price of acquired intangible assets acquired through third party agreements based on their estimated relative fair values . we allocate a portion of purchase price of acquired companies to the product related technology assets and other intangible assets acquired based on their estimated fair values . we typically engage third party appraisal firms to assist us in determining the fair values and useful lives of product related technology assets and other intangible assets acquired . such valuations and useful life determinations require us to make significant estimates and assumptions . these estimates are based on historical experience and information obtained from the management of the acquired companies and are inherently uncertain . critical estimates in determining the fair value and useful lives of the product related technology assets include but are not limited to future expected cash flows earned from the product related technology and discount rates applied in determining the present value of those cash flows . critical estimates in valuing certain other intangible assets include but are not limited to future expected cash flows from customer contracts , customer lists , distribution agreements , patents , brand awareness and market position , as well as discount rates . management 's estimates of fair value are based upon assumptions believed to be reasonable . unanticipated events and circumstances may occur which may affect the accuracy or validity of such assumptions , estimates or actual results . we monitor acquired intangible assets for impairment on a periodic basis by reviewing for indicators of impairment . if an indicator exists we compare the estimated net realizable value to the unamortized cost of the intangible asset . the recoverability of the intangible assets is primarily dependent upon our ability to commercialize products utilizing the acquired technologies , retain existing customers and customer contracts , and maintain brand awareness . the estimated net realizable value of the acquired intangible assets is based on the estimated undiscounted future cash flows derived from such intangible assets . our assumptions about future revenues and expenses require significant judgment associated with the forecast of the performance of our products , customer retention rates and ability to secure and maintain our market position . actual revenues and costs could vary significantly from these forecasted amounts . if these products are not ultimately accepted by our customers and distributors , and there is no alternative future use for the technology ; or if we fail to retain acquired customers or 38 successfully market acquired brands , we could determine that some or all of the remaining $ 283.4 million carrying value of our acquired intangible assets is impaired . in the event of impairment , we would record an impairment charge to earnings that could have a material adverse effect on our results of operations . during the year ended december 31 , 2015 , we tested certain intangible assets for recoverability due to changes in facts and circumstances associated with the shift in strategic focus and reduced profitability expectations . as a result , we identified certain definite-lived intangible assets that were impaired within our enterprise and service provider business unit , primarily customer relationships and product technologies from the acquisition of bytemobile and sanbolic , and recorded non-cash impairment charges of $ 123.0 million to write down the intangible assets to their estimated fair value of $ 26.8 million . of the impairment charge , $ 67.1

