revenues generated by our other professionals , or full-time equivalents , are largely dependent on the number of consultants we employ , their hours worked , and billing rates charged , as well as the number of pages reviewed and amount of data processed in the case of our document review and electronic data discovery groups , respectively . we generate the majority of our revenues from providing professional services under four types of billing arrangements : time-and-expense , fixed-fee ( including software license revenue ) , performance-based , and support and maintenance for the software we deploy . time-and-expense billing arrangements require the client to pay based on either the number of hours worked , the number of pages reviewed , or the amount of data processed by our revenue-generating professionals at agreed upon rates . we recognize revenues under time-and-expense billing arrangements as the related services are rendered . time-and-expense engagements represented 43.6 % , 44.9 % , and 47.7 % of our revenues in 2014 , 2013 , and 2012 , respectively . in fixed-fee billing arrangements , we agree to a pre-established fee in exchange for a predetermined set of professional services . we set the fees based on our estimates of the costs and timing for completing the engagements . it is the client 's expectation in these engagements that the pre-established fee will not be exceeded except in mutually agreed upon circumstances . we generally recognize revenues under fixed-fee billing arrangements using a proportionate performance approach , which is based on work completed to-date versus our estimates of the total services to be provided under the engagement . we generate revenues from licensing two types of proprietary software to clients : revenue cycle management software and research administration and compliance software . licenses for our revenue cycle management software are 27 sold only as a component of our consulting projects , and the services we provide are essential to the functionality of the software . therefore , revenues from these software licenses are recognized over the term of the related consulting services contract , which are typically fixed-fee . license revenue from our research administration and compliance software is generally recognized in the month in which the software is delivered . for the years ended december 31 , 2014 , 2013 , and 2012 , fixed-fee engagements ( including software license revenue ) represented approximately 39.6 % , 37.2 % , and 34.7 % of our revenues , respectively . in performance-based fee billing arrangements , fees are tied to the attainment of contractually defined objectives . we enter into performance-based engagements in essentially two forms . first , we generally earn fees that are directly related to the savings formally acknowledged by the client as a result of adopting our recommendations for improving operational and cost effectiveness in the areas we review . second , we have performance-based engagements in which we earn a success fee when and if certain predefined outcomes occur . often , performance-based fees supplement our time-and-expense or fixed-fee engagements . we do not recognize revenues under performance-based billing arrangements until all related performance criteria are met . performance-based fee revenues represented 13.5 % , 14.6 % , and 14.2 % of our revenues in 2014 , 2013 , and 2012 , respectively . performance-based fee engagements may cause significant variations in quarterly revenues and operating results depending on the timing of achieving the performance-based criteria . clients that have purchased one of our software licenses can pay an annual fee for software support and maintenance . annual support and maintenance fee revenue is recognized ratably over the support period , which is generally one year . these fees are typically billed in advance and included in deferred revenues until recognized . support and maintenance revenues represented 3.3 % , 3.3 % , and 3.4 % of our revenues in 2014 , 2013 , and 2012 , respectively . our quarterly results are impacted principally by our full-time consultants ' utilization rate , the billing rates we charge our clients , the number of our revenue-generating professionals who are available to work , and the amount of performance-based fees recognized , which often vary significantly between quarters . our utilization rate can be negatively affected by increased hiring because there is generally a transition period for new professionals that results in a temporary drop in our utilization rate . our utilization rate can also be affected by seasonal variations in the demand for our services from our clients . for example , during the third and fourth quarters of the year , vacations taken by our clients can result in the deferral of activity on existing and new engagements , which would negatively affect our utilization rate . the number of business work days is also affected by the number of vacation days taken by our consultants and holidays in each quarter . we typically have fewer business work days available in the fourth quarter of the year , which can impact revenues during that period . time-and-expense engagements do not provide us with a high degree of predictability as to performance in future periods . unexpected changes in the demand for our services can result in significant variations in utilization and revenues and present a challenge to optimal hiring and staffing . moreover , our clients typically retain us on an engagement-by-engagement basis , rather than under long-term recurring contracts . the volume of work performed for any particular client can vary widely from period to period . reimbursable expenses reimbursable expenses that are billed to clients , primarily relating to travel and out-of-pocket expenses incurred in connection with engagements , are included in total revenues and reimbursable expenses , and typically an equivalent amount of these expenses are included in total direct costs and reimbursable expenses . reimbursable expenses also include those subcontractors who are billed to our clients at cost . story_separator_special_tag net litigation and other gains totaled $ 5.9 million for the year ended december 31 , 2013. these gains primarily consisted of a $ 5.3 million gain that was recorded as a result of reaching a settlement agreement to resolve a lawsuit brought by huron . depreciation and amortization expense increased $ 4.5 million , or 22.0 % , to $ 25.0 million for the year ended december 31 , 2014 , from $ 20.5 million for the year ended december 31 , 2013. the increase primarily related to the amortization of intangible assets from businesses acquired during 2014 and the fourth quarter of 2013 , as well as the depreciation of network equipment and leasehold improvements that were placed into service during the second half of 2013 and first half of 2014. intangible asset amortization included within operating expenses relates to customer relationships , non-competition agreements , trade names , and licenses acquired in connection with our acquisitions . 35 operating income operating income increased $ 3.1 million , or 2.6 % , to $ 123.0 million for the year ended december 31 , 2014 , from $ 119.9 million for the year ended december 31 , 2013. operating margin , which is defined as operating income expressed as a percentage of revenues , decreased to 15.2 % in 2014 compared to 16.6 % in 2013. the decrease in operating margin was primarily attributable to the increase in salaries and related expenses for our revenue-generating professionals as a percentage of revenues and the decrease in litigation and other gains , partially offset by revenue growth that outpaced the increase in bonus expense for our revenue-generating professionals . other expense , net other expense , net increased $ 2.1 million , or 33.9 % , to $ 8.4 million for the year ended december 31 , 2014 , from $ 6.3 million for the year ended december 31 , 2013. interest expense , net of interest income increased by $ 2.2 million , primarily from interest expense recorded for our convertible notes issued in september 2014 , partially offset by a decrease in our borrowing levels under our senior secured credit facility . for 2014 , interest expense related to the convertible notes totaled $ 3.5 million , consisting of $ 1.0 million for the stated coupon of the convertible notes and $ 2.5 million for the amortization of debt discount and debt issuance costs . for the year ending december 31 , 2015 , we expect interest expense related to the coupon of the convertible notes to be $ 3.1 million and interest expense for the amortization of debt discount and debt issuance costs related to the convertible notes to be $ 8.3 million . income tax expense for the year ended december 31 , 2014 , we recognized income tax expense from continuing operations of $ 35.6 million on income from continuing operations of $ 114.6 million , for an effective tax rate of 31.0 % . for the year ended december 31 , 2013 , we recognized income tax expense from continuing operations of $ 47.2 million on income from continuing operations of $ 113.6 million , for an effective tax rate of 41.5 % . our effective tax rate for 2014 was lower than the statutory rate , inclusive of state income taxes , primarily due to the impact of a tax election made in the first quarter of 2014 to classify one of our wholly-owned foreign subsidiaries as a disregarded entity for u.s. federal income tax purposes ( commonly referred to as a check-the-box election ) . as a result of this election , we expect to realize an income tax benefit of $ 13.8 million , of which $ 2.4 million is unrecognized , resulting in a net recognized tax benefit of $ 11.4 million . this recognized benefit was partially offset by $ 1.2 million in expenses related to the establishment of a valuation allowance for certain foreign tax credits and increased deferred tax liabilities as a result of the aforementioned election . our effective tax rate for 2013 was higher than the statutory rate , inclusive of state income taxes , primarily due to the impact of foreign losses with no tax benefit and certain non-deductible business expenses , partially offset by the impact of certain credits and deductions . net income from continuing operations net income from continuing operations was $ 79.1 million for the year ended december 31 , 2014 , compared to $ 66.5 million for the year ended december 31 , 2013. the $ 12.6 million increase in net income from continuing operations was primarily due to the increase in operating income , as well as the decrease in income tax expense , as discussed above . as a result of the increase in net income from continuing operations , diluted earnings per share from continuing operations for the year ended december 31 , 2014 was $ 3.45 compared to $ 2.92 for 2013. ebitda and adjusted ebitda ebitda increased $ 9.4 million , or 6.5 % , to $ 152.9 million for the year ended december 31 , 2014 , from $ 143.5 million for the year ended december 31 , 2013. adjusted ebitda increased $ 17.4 million , or 12.5 % , to $ 155.7 million in 2014 from $ 138.4 million in 2013. the increase in ebitda was primarily due to the increase in the segment operating income , as discussed below in segment results , partially offset by an increase in corporate expenses and a decrease in litigation and other gains . the increase in adjusted ebitda was primarily due to the increase in segment operating income , partially offset by an increase in corporate expenses , excluding the impact of the restructuring charges and litigation and other gains . 36 adjusted net income from continuing operations adjusted net income from continuing operations increased $ 11.0 million , or 16.3 % , to $

liquidity and capital resources cash and cash equivalents were $ 256.9 million , $ 58.1 million , and $ 25.2 million at december 31 , 2014 , 2013 , and 2012 , respectively . as of december 31 , 2014 , our primary sources of liquidity are cash on hand , cash flows from our u.s. operations , and borrowing capacity available under our credit facility . replace_table_token_10_th 45 operating activities net cash provided by operating activities totaled $ 146.5 million , $ 115.3 million , and $ 102.4 million for the years ended december 31 , 2014 , 2013 , and 2012 , respectively . our operating assets and liabilities consist primarily of receivables from billed and unbilled services , accounts payable and accrued expenses , accrued payroll and related benefits , and deferred revenues . the volume of services rendered and the related billings and timing of collections on those billings , as well as payments of our accounts payable and salaries , bonuses , and related benefits to employees affect these account balances . the increase in cash provided by operations in 2014 compared to 2013 was primarily attributable to increased cash collections from clients , driven by our growth in revenues , as well as lower tax payments , and higher net income , partially offset by an increase in the amount paid for annual performance bonuses and an increase in unbilled services from clients . the increase in the unbilled services from clients was driven by several large healthcare implementation projects where the services provided and corresponding revenue recognized as of december 31 , 2014 has exceeded the amount billed to the client in accordance with the contractual billing terms . we expect to bill and collect these unbilled services in 2015. the increase in unbilled services is largely offset by the improved collections on billed services .


 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 cash and cash equivalents were $ 256.9 million , $ 58.1 million , and $ 25.2 million at december 31 , 2014 , 2013 , and 2012 , respectively . as of december 31 , 2014 , our primary sources of liquidity are cash on hand , cash flows from our u.s. operations , and borrowing capacity available under our credit facility . replace_table_token_10_th 45 operating activities net cash provided by operating activities totaled $ 146.5 million , $ 115.3 million , and $ 102.4 million for the years ended december 31 , 2014 , 2013 , and 2012 , respectively . our operating assets and liabilities consist primarily of receivables from billed and unbilled services , accounts payable and accrued expenses , accrued payroll and related benefits , and deferred revenues . the volume of services rendered and the related billings and timing of collections on those billings , as well as payments of our accounts payable and salaries , bonuses , and related benefits to employees affect these account balances . the increase in cash provided by operations in 2014 compared to 2013 was primarily attributable to increased cash collections from clients , driven by our growth in revenues , as well as lower tax payments , and higher net income , partially offset by an increase in the amount paid for annual performance bonuses and an increase in unbilled services from clients . the increase in the unbilled services from clients was driven by several large healthcare implementation projects where the services provided and corresponding revenue recognized as of december 31 , 2014 has exceeded the amount billed to the client in accordance with the contractual billing terms . we expect to bill and collect these unbilled services in 2015. the increase in unbilled services is largely offset by the improved collections on billed services .
```    
 Suspicious Activity Report : revenues generated by our other professionals , or full-time equivalents , are largely dependent on the number of consultants we employ , their hours worked , and billing rates charged , as well as the number of pages reviewed and amount of data processed in the case of our document review and electronic data discovery groups , respectively . we generate the majority of our revenues from providing professional services under four types of billing arrangements : time-and-expense , fixed-fee ( including software license revenue ) , performance-based , and support and maintenance for the software we deploy . time-and-expense billing arrangements require the client to pay based on either the number of hours worked , the number of pages reviewed , or the amount of data processed by our revenue-generating professionals at agreed upon rates . we recognize revenues under time-and-expense billing arrangements as the related services are rendered . time-and-expense engagements represented 43.6 % , 44.9 % , and 47.7 % of our revenues in 2014 , 2013 , and 2012 , respectively . in fixed-fee billing arrangements , we agree to a pre-established fee in exchange for a predetermined set of professional services . we set the fees based on our estimates of the costs and timing for completing the engagements . it is the client 's expectation in these engagements that the pre-established fee will not be exceeded except in mutually agreed upon circumstances . we generally recognize revenues under fixed-fee billing arrangements using a proportionate performance approach , which is based on work completed to-date versus our estimates of the total services to be provided under the engagement . we generate revenues from licensing two types of proprietary software to clients : revenue cycle management software and research administration and compliance software . licenses for our revenue cycle management software are 27 sold only as a component of our consulting projects , and the services we provide are essential to the functionality of the software . therefore , revenues from these software licenses are recognized over the term of the related consulting services contract , which are typically fixed-fee . license revenue from our research administration and compliance software is generally recognized in the month in which the software is delivered . for the years ended december 31 , 2014 , 2013 , and 2012 , fixed-fee engagements ( including software license revenue ) represented approximately 39.6 % , 37.2 % , and 34.7 % of our revenues , respectively . in performance-based fee billing arrangements , fees are tied to the attainment of contractually defined objectives . we enter into performance-based engagements in essentially two forms . first , we generally earn fees that are directly related to the savings formally acknowledged by the client as a result of adopting our recommendations for improving operational and cost effectiveness in the areas we review . second , we have performance-based engagements in which we earn a success fee when and if certain predefined outcomes occur . often , performance-based fees supplement our time-and-expense or fixed-fee engagements . we do not recognize revenues under performance-based billing arrangements until all related performance criteria are met . performance-based fee revenues represented 13.5 % , 14.6 % , and 14.2 % of our revenues in 2014 , 2013 , and 2012 , respectively . performance-based fee engagements may cause significant variations in quarterly revenues and operating results depending on the timing of achieving the performance-based criteria . clients that have purchased one of our software licenses can pay an annual fee for software support and maintenance . annual support and maintenance fee revenue is recognized ratably over the support period , which is generally one year . these fees are typically billed in advance and included in deferred revenues until recognized . support and maintenance revenues represented 3.3 % , 3.3 % , and 3.4 % of our revenues in 2014 , 2013 , and 2012 , respectively . our quarterly results are impacted principally by our full-time consultants ' utilization rate , the billing rates we charge our clients , the number of our revenue-generating professionals who are available to work , and the amount of performance-based fees recognized , which often vary significantly between quarters . our utilization rate can be negatively affected by increased hiring because there is generally a transition period for new professionals that results in a temporary drop in our utilization rate . our utilization rate can also be affected by seasonal variations in the demand for our services from our clients . for example , during the third and fourth quarters of the year , vacations taken by our clients can result in the deferral of activity on existing and new engagements , which would negatively affect our utilization rate . the number of business work days is also affected by the number of vacation days taken by our consultants and holidays in each quarter . we typically have fewer business work days available in the fourth quarter of the year , which can impact revenues during that period . time-and-expense engagements do not provide us with a high degree of predictability as to performance in future periods . unexpected changes in the demand for our services can result in significant variations in utilization and revenues and present a challenge to optimal hiring and staffing . moreover , our clients typically retain us on an engagement-by-engagement basis , rather than under long-term recurring contracts . the volume of work performed for any particular client can vary widely from period to period . reimbursable expenses reimbursable expenses that are billed to clients , primarily relating to travel and out-of-pocket expenses incurred in connection with engagements , are included in total revenues and reimbursable expenses , and typically an equivalent amount of these expenses are included in total direct costs and reimbursable expenses . reimbursable expenses also include those subcontractors who are billed to our clients at cost . story_separator_special_tag net litigation and other gains totaled $ 5.9 million for the year ended december 31 , 2013. these gains primarily consisted of a $ 5.3 million gain that was recorded as a result of reaching a settlement agreement to resolve a lawsuit brought by huron . depreciation and amortization expense increased $ 4.5 million , or 22.0 % , to $ 25.0 million for the year ended december 31 , 2014 , from $ 20.5 million for the year ended december 31 , 2013. the increase primarily related to the amortization of intangible assets from businesses acquired during 2014 and the fourth quarter of 2013 , as well as the depreciation of network equipment and leasehold improvements that were placed into service during the second half of 2013 and first half of 2014. intangible asset amortization included within operating expenses relates to customer relationships , non-competition agreements , trade names , and licenses acquired in connection with our acquisitions . 35 operating income operating income increased $ 3.1 million , or 2.6 % , to $ 123.0 million for the year ended december 31 , 2014 , from $ 119.9 million for the year ended december 31 , 2013. operating margin , which is defined as operating income expressed as a percentage of revenues , decreased to 15.2 % in 2014 compared to 16.6 % in 2013. the decrease in operating margin was primarily attributable to the increase in salaries and related expenses for our revenue-generating professionals as a percentage of revenues and the decrease in litigation and other gains , partially offset by revenue growth that outpaced the increase in bonus expense for our revenue-generating professionals . other expense , net other expense , net increased $ 2.1 million , or 33.9 % , to $ 8.4 million for the year ended december 31 , 2014 , from $ 6.3 million for the year ended december 31 , 2013. interest expense , net of interest income increased by $ 2.2 million , primarily from interest expense recorded for our convertible notes issued in september 2014 , partially offset by a decrease in our borrowing levels under our senior secured credit facility . for 2014 , interest expense related to the convertible notes totaled $ 3.5 million , consisting of $ 1.0 million for the stated coupon of the convertible notes and $ 2.5 million for the amortization of debt discount and debt issuance costs . for the year ending december 31 , 2015 , we expect interest expense related to the coupon of the convertible notes to be $ 3.1 million and interest expense for the amortization of debt discount and debt issuance costs related to the convertible notes to be $ 8.3 million . income tax expense for the year ended december 31 , 2014 , we recognized income tax expense from continuing operations of $ 35.6 million on income from continuing operations of $ 114.6 million , for an effective tax rate of 31.0 % . for the year ended december 31 , 2013 , we recognized income tax expense from continuing operations of $ 47.2 million on income from continuing operations of $ 113.6 million , for an effective tax rate of 41.5 % . our effective tax rate for 2014 was lower than the statutory rate , inclusive of state income taxes , primarily due to the impact of a tax election made in the first quarter of 2014 to classify one of our wholly-owned foreign subsidiaries as a disregarded entity for u.s. federal income tax purposes ( commonly referred to as a check-the-box election ) . as a result of this election , we expect to realize an income tax benefit of $ 13.8 million , of which $ 2.4 million is unrecognized , resulting in a net recognized tax benefit of $ 11.4 million . this recognized benefit was partially offset by $ 1.2 million in expenses related to the establishment of a valuation allowance for certain foreign tax credits and increased deferred tax liabilities as a result of the aforementioned election . our effective tax rate for 2013 was higher than the statutory rate , inclusive of state income taxes , primarily due to the impact of foreign losses with no tax benefit and certain non-deductible business expenses , partially offset by the impact of certain credits and deductions . net income from continuing operations net income from continuing operations was $ 79.1 million for the year ended december 31 , 2014 , compared to $ 66.5 million for the year ended december 31 , 2013. the $ 12.6 million increase in net income from continuing operations was primarily due to the increase in operating income , as well as the decrease in income tax expense , as discussed above . as a result of the increase in net income from continuing operations , diluted earnings per share from continuing operations for the year ended december 31 , 2014 was $ 3.45 compared to $ 2.92 for 2013. ebitda and adjusted ebitda ebitda increased $ 9.4 million , or 6.5 % , to $ 152.9 million for the year ended december 31 , 2014 , from $ 143.5 million for the year ended december 31 , 2013. adjusted ebitda increased $ 17.4 million , or 12.5 % , to $ 155.7 million in 2014 from $ 138.4 million in 2013. the increase in ebitda was primarily due to the increase in the segment operating income , as discussed below in segment results , partially offset by an increase in corporate expenses and a decrease in litigation and other gains . the increase in adjusted ebitda was primarily due to the increase in segment operating income , partially offset by an increase in corporate expenses , excluding the impact of the restructuring charges and litigation and other gains . 36 adjusted net income from continuing operations adjusted net income from continuing operations increased $ 11.0 million , or 16.3 % , to $

