our recently awarded large civil projects have contract durations of approximately four to five years . accordingly , we expect to realize the benefits of these projects over the next several years . typically , in later stages of our projects , productivity increases are realized and claims and unapproved change orders , if any , are resolved . when projects are in later stages of completion , these changes may result in more significant impacts to profitability . 32 the following table sets forth our consolidated results of operations : replace_table_token_18_th replace_table_token_19_th revenues were $ 4,175.7 million in 2013 , as compared to $ 4,111.5 million in 2012 and $ 3,716.3 million in 2011. income from construction operations was $ 203.8 million in 2013 , as compared to loss from construction operations of $ 221.8 million in 2012 and income from construction operations of $ 168.4 million in 2011. in 2012 , our loss from construction operations of $ 221.8 million was materially impacted by a $ 376.6 million goodwill and intangible asset impairment charge ( $ 326.4 million after-tax ) , due primarily to a deterioration in broader market conditions , degradation in the timing of projected cash flows used to derive the fair value , and a sustained decrease in the company 's stock price , causing its market capitalization to be substantially less than its carrying value . see additional discussion under critical accounting policies below . net income was $ 87.3 million in 2013 , as compared to a net loss of $ 265.4 million in 2012 and net income of $ 86.1 million in 2011. basic and diluted earnings per share were $ 1.82 and $ 1.80 , respectively , in 2013 , as compared to basic and diluted loss per share of $ 5.59 and $ 5.59 , respectively , in 2012 , and basic and diluted earnings per share of $ 1.82 and $ 1.80 , respectively , in 2011. excluding the $ 326.4 million after-tax goodwill and intangible asset impairment charge , the $ 3.0 million after-tax litigation provision relating to an adverse court decision , $ 3.6 million in discrete tax expense adjustments and a $ 2.7 million pre-tax loss on the sale of certain auction rate securities , net income and diluted earnings per share for 2012 were $ 70.3 million , and $ 1.46 , respectively . net income and diluted earnings per share excluding these adjustments are non-u.s. gaap financial measures , which are discussed below and are reconciled to the most directly comparable u.s. gaap measures . 33 revenues increased by $ 64.2 million , or 1.6 % during 2013. this increase was primarily driven by increased activity in certain hospitality and gaming projects in california , arizona and nevada as well as increased activity and the start-up of projects at hudson yards in new york . these increases were offset by reduced activity on large healthcare facility projects in northern california . income from construction operations increased by $ 425.6 million during 2013. this increase was primarily driven by the $ 376.6 million goodwill and intangible asset impairment charge discussed above . excluding the impairment charge , income from construction operations increased by $ 49.1 million , or 31.7 % during 2013. this increase was primarily driven by strong operating performance in our civil group . other expense ( income ) , net , was an expense of $ 18.6 million in 2013 , an increase of $ 16.7 million compared to an expense of $ 1.9 million in 2012. this increase was primarily driven by increases to certain business acquisition related liabilities . interest expense increased by $ 1.5 million during 2013. this increase was primarily driven by increased draws on our revolving facilities . the provision for income taxes increased by $ 54.8 million during 2013. the income tax benefit in 2012 includes the impact of a $ 50.2 million reduction in our provision for income taxes recorded due to the impairment charge discussed above . at december 31 , 2013 , we had working capital of $ 787.4 million , a ratio of current assets to current liabilities of 1.61 to 1.00 , and a ratio of debt to equity of 0.59 to 1.00 compared to working capital of $ 747.6 million , a ratio of current assets to current liabilities of 1.61 to 1.00 , and a ratio of debt to equity of 0.64 to 1.00 at december 31 , 2012. our stockholders ' equity increased to $ 1.2 billion as of december 31 , 2013 from $ 1.1 billion as of december 31 , 2012. non-u.s. gaap measures our consolidated financial statements are presented based on u.s. gaap . we sometimes use non-u.s. gaap measures of income from operations , net income , earnings per share and other measures that we believe are appropriate to enhance an overall understanding of our historical financial performance and future prospects . we are providing these non-u.s. gaap measures to disclose additional information to facilitate the comparison of past and present operations , and they are among the indicators management uses as a basis for evaluating the company 's financial performance as well as for forecasting future periods . for these reasons , management believes these non-u.s.gaap measures can be useful operating performance measures to be considered by investors , prospective investors and others . these non-u.s. gaap measures are not intended to replace the presentation of our financial results in accordance with u.s. gaap , and they may not be comparable to other similarly titled measures of other companies . 34 the following table is a reconciliation of reported income ( loss ) from construction operations , net income ( loss ) , and diluted earnings ( loss ) per share under u.s. gaap to income from operations , net income and diluted earnings per share for the years ended december 31 , 2013 and 2012 , excluding discrete items . story_separator_special_tag · market control premium : we compare our implied control premium to the average control premium paid in transactions of companies in the construction industry during the year of evaluation . · sensitivity analysis : we perform a sensitivity analysis to determine the minimum control premium required to recover the book value of the company at the testing date . the minimum control premium required is then compared to the average control premium paid in transactions of companies in the construction industry during the year of evaluation . · impact of low public float and limited trading activity : a significant portion of our common stock is owned by our chairman and ceo . as a result , the public float of our common stock , calculated as the percentage of shares of common stock freely traded by public investors divided by our total shares outstanding , is significantly lower than that of its publicly traded peers . this circumstance does not impact the fair value of the company , however based on its evaluation of third party market data , we believe it does lead to an inherent marketability discount impacting its stock price . impairment assessment inherently involves management judgments as to the assumptions used for projections and to evaluate the impact of market conditions on those assumptions . the key assumptions that we use to estimate the fair value of our reporting units under the income-based approach are as follows : · weighted average cost of capital used to discount the projected cash flows ; · cash flows generated from existing and new work awards ; and · projected operating margins . 38 weighted average cost of capital rates used to discount the projected cash flows are developed via the capital asset pricing model which is primarily based upon market inputs . we use discount rates that management feels are an accurate reflection of the risks associated with the forecasted cash flows of our respective reporting units . to develop the cash flows generated from new work awards and future operating margins , we primarily track prospective work for each of our reporting units on a project-by-project basis as well as the estimated timing of when the work would be bid or prequalified , started and completed . we also give consideration to our relationships with the prospective owners , the pool of competitors that are capable of performing large , complex work , changes in business strategy and the company 's history of success in winning new work in each reporting unit . with regard to operating margins , we give consideration to our historical reporting unit operating margins in the end markets that the prospective work opportunities are most significant , current market trends in recent new work procurement , and changes in business strategy . we also estimate the fair value of our reporting units under a market-based approach by applying industry-comparable multiples of revenues and operating earnings to our reporting units ' projected performance . the conditions and prospects of companies in the construction industry depend on common factors such as overall demand for services . changes in our assumptions or estimates could materially affect the determination of the fair value of a reporting unit . such changes in assumptions could be caused by : · terminations , suspensions , reductions in scope or delays in the start-up of the revenues and cash flows from backlog as well as the prospective work we track ; · reductions in available government , state and local agencies and non-residential private industry funding and spending ; · our ability to effectively compete for new work and maintain and grow market penetration in the regions that the company operates in ; · our ability to successfully control costs , work schedule , and project delivery ; or · broader market conditions , including stock market volatility in the construction industry and its impact on the weighted average cost of capital assumption . on a quarterly basis we consider whether events or changes in circumstances indicate that assets , including goodwill and intangible assets not subject to amortization might be impaired . in conjunction with this analysis , we evaluate whether our current market capitalization is less than our stockholders ' equity and specifically consider ( 1 ) changes in macroeconomic conditions , ( 2 ) changes in general economic conditions in the construction industry including any declines in market-dependent multiples , ( 3 ) cost factors such as increases in raw materials , labor , or other costs that have a negative effect on earnings and cash flows analyses , ( 4 ) a reconciliation of the implied control premium to a current market control premium , ( 5 ) target price assessments by third party analysts and ( 6 ) the impact of current market conditions on its forecast of future cash flows including consideration of specific projects in backlog , pending awards , or large prospect opportunities . we also evaluate our most recent assessment of the fair value for each of our reporting units , considering whether our current forecast of future cash flows is in line with those used in our annual impairment assessment and whether there are any significant changes in trends or any other material assumptions used . as of december 31 , 2013 , we have concluded that we do not have an impairment of our goodwill or our indefinite-lived intangible assets and that the estimated fair value of each reporting unit exceeds its carrying value . see note 4  goodwill and other intangible assets of the notes to consolidated financial statements in part iv , item 15. exhibits and financial statement schedu le for additional goodwill disclosure . fair value measurements  our investment in auction rate securities ( ars ) is measured at fair value utilizing unobservable ( level 3 ) inputs . we have determined the estimated fair values of these securities utilizing an income approach

debt debt was $ 733.9 million at december 31 , 2013 , a decrease of $ 3.2 million from $ 737.1 million at december 31 , 2012 , primarily due to the pay down of our $ 200 million term loan by $ 37.5 million , partially offset by a net increase of $ 15.0 million in borrowings on our revolving line of credit . we utilized the revolving facility for outstanding letters of credit in the amount of $ 0.2 million . accordingly , at december 31 , 2013 , we had $ 164.8 million available to borrow under our credit agreement . excluding the outstanding borrowings of $ 135.0 million on our revolving line of credit , unsecured senior notes of $ 298.5 million and our $ 200 million term loan ( which had been paid down to $ 115.0 million as of december 31 , 2013 from $ 152.5 million at december 31 , 2012 ) , the remaining balance of $ 185.4 million of our outstanding debt is generally secured by the underlying assets . our debt to equity ratio was 0.59 to 1.00 as of december 31 , 2013 compared to 0.64 to 1.00 as of december 31 , 2012. on august 2 , 2012 , we entered into a first amendment ( the first amendment ) to our fifth amended and restated credit agreement ( the credit agreement ) entered into on august 3 , 2011 as borrower , with bank of america , n.a. , as administrative agent , swing line lender and l/c issuer . the first amendment modified the financial covenants under the credit agreement to allow for more favorable minimum net worth , minimum fixed charge and maximum leverage ratios for us and also to add several new financial covenants including minimum liquidity and a consolidated senior leverage ratio . the first amendment also modified the applicable interest rates for amounts outstanding under the credit facility as well as the quarterly fees per annum for the unused portion of the credit facility . see amended credit agreement below for a detailed discussion of this amendment .


 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 debt was $ 733.9 million at december 31 , 2013 , a decrease of $ 3.2 million from $ 737.1 million at december 31 , 2012 , primarily due to the pay down of our $ 200 million term loan by $ 37.5 million , partially offset by a net increase of $ 15.0 million in borrowings on our revolving line of credit . we utilized the revolving facility for outstanding letters of credit in the amount of $ 0.2 million . accordingly , at december 31 , 2013 , we had $ 164.8 million available to borrow under our credit agreement . excluding the outstanding borrowings of $ 135.0 million on our revolving line of credit , unsecured senior notes of $ 298.5 million and our $ 200 million term loan ( which had been paid down to $ 115.0 million as of december 31 , 2013 from $ 152.5 million at december 31 , 2012 ) , the remaining balance of $ 185.4 million of our outstanding debt is generally secured by the underlying assets . our debt to equity ratio was 0.59 to 1.00 as of december 31 , 2013 compared to 0.64 to 1.00 as of december 31 , 2012. on august 2 , 2012 , we entered into a first amendment ( the first amendment ) to our fifth amended and restated credit agreement ( the credit agreement ) entered into on august 3 , 2011 as borrower , with bank of america , n.a. , as administrative agent , swing line lender and l/c issuer . the first amendment modified the financial covenants under the credit agreement to allow for more favorable minimum net worth , minimum fixed charge and maximum leverage ratios for us and also to add several new financial covenants including minimum liquidity and a consolidated senior leverage ratio . the first amendment also modified the applicable interest rates for amounts outstanding under the credit facility as well as the quarterly fees per annum for the unused portion of the credit facility . see amended credit agreement below for a detailed discussion of this amendment .
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 Suspicious Activity Report : our recently awarded large civil projects have contract durations of approximately four to five years . accordingly , we expect to realize the benefits of these projects over the next several years . typically , in later stages of our projects , productivity increases are realized and claims and unapproved change orders , if any , are resolved . when projects are in later stages of completion , these changes may result in more significant impacts to profitability . 32 the following table sets forth our consolidated results of operations : replace_table_token_18_th replace_table_token_19_th revenues were $ 4,175.7 million in 2013 , as compared to $ 4,111.5 million in 2012 and $ 3,716.3 million in 2011. income from construction operations was $ 203.8 million in 2013 , as compared to loss from construction operations of $ 221.8 million in 2012 and income from construction operations of $ 168.4 million in 2011. in 2012 , our loss from construction operations of $ 221.8 million was materially impacted by a $ 376.6 million goodwill and intangible asset impairment charge ( $ 326.4 million after-tax ) , due primarily to a deterioration in broader market conditions , degradation in the timing of projected cash flows used to derive the fair value , and a sustained decrease in the company 's stock price , causing its market capitalization to be substantially less than its carrying value . see additional discussion under critical accounting policies below . net income was $ 87.3 million in 2013 , as compared to a net loss of $ 265.4 million in 2012 and net income of $ 86.1 million in 2011. basic and diluted earnings per share were $ 1.82 and $ 1.80 , respectively , in 2013 , as compared to basic and diluted loss per share of $ 5.59 and $ 5.59 , respectively , in 2012 , and basic and diluted earnings per share of $ 1.82 and $ 1.80 , respectively , in 2011. excluding the $ 326.4 million after-tax goodwill and intangible asset impairment charge , the $ 3.0 million after-tax litigation provision relating to an adverse court decision , $ 3.6 million in discrete tax expense adjustments and a $ 2.7 million pre-tax loss on the sale of certain auction rate securities , net income and diluted earnings per share for 2012 were $ 70.3 million , and $ 1.46 , respectively . net income and diluted earnings per share excluding these adjustments are non-u.s. gaap financial measures , which are discussed below and are reconciled to the most directly comparable u.s. gaap measures . 33 revenues increased by $ 64.2 million , or 1.6 % during 2013. this increase was primarily driven by increased activity in certain hospitality and gaming projects in california , arizona and nevada as well as increased activity and the start-up of projects at hudson yards in new york . these increases were offset by reduced activity on large healthcare facility projects in northern california . income from construction operations increased by $ 425.6 million during 2013. this increase was primarily driven by the $ 376.6 million goodwill and intangible asset impairment charge discussed above . excluding the impairment charge , income from construction operations increased by $ 49.1 million , or 31.7 % during 2013. this increase was primarily driven by strong operating performance in our civil group . other expense ( income ) , net , was an expense of $ 18.6 million in 2013 , an increase of $ 16.7 million compared to an expense of $ 1.9 million in 2012. this increase was primarily driven by increases to certain business acquisition related liabilities . interest expense increased by $ 1.5 million during 2013. this increase was primarily driven by increased draws on our revolving facilities . the provision for income taxes increased by $ 54.8 million during 2013. the income tax benefit in 2012 includes the impact of a $ 50.2 million reduction in our provision for income taxes recorded due to the impairment charge discussed above . at december 31 , 2013 , we had working capital of $ 787.4 million , a ratio of current assets to current liabilities of 1.61 to 1.00 , and a ratio of debt to equity of 0.59 to 1.00 compared to working capital of $ 747.6 million , a ratio of current assets to current liabilities of 1.61 to 1.00 , and a ratio of debt to equity of 0.64 to 1.00 at december 31 , 2012. our stockholders ' equity increased to $ 1.2 billion as of december 31 , 2013 from $ 1.1 billion as of december 31 , 2012. non-u.s. gaap measures our consolidated financial statements are presented based on u.s. gaap . we sometimes use non-u.s. gaap measures of income from operations , net income , earnings per share and other measures that we believe are appropriate to enhance an overall understanding of our historical financial performance and future prospects . we are providing these non-u.s. gaap measures to disclose additional information to facilitate the comparison of past and present operations , and they are among the indicators management uses as a basis for evaluating the company 's financial performance as well as for forecasting future periods . for these reasons , management believes these non-u.s.gaap measures can be useful operating performance measures to be considered by investors , prospective investors and others . these non-u.s. gaap measures are not intended to replace the presentation of our financial results in accordance with u.s. gaap , and they may not be comparable to other similarly titled measures of other companies . 34 the following table is a reconciliation of reported income ( loss ) from construction operations , net income ( loss ) , and diluted earnings ( loss ) per share under u.s. gaap to income from operations , net income and diluted earnings per share for the years ended december 31 , 2013 and 2012 , excluding discrete items . story_separator_special_tag · market control premium : we compare our implied control premium to the average control premium paid in transactions of companies in the construction industry during the year of evaluation . · sensitivity analysis : we perform a sensitivity analysis to determine the minimum control premium required to recover the book value of the company at the testing date . the minimum control premium required is then compared to the average control premium paid in transactions of companies in the construction industry during the year of evaluation . · impact of low public float and limited trading activity : a significant portion of our common stock is owned by our chairman and ceo . as a result , the public float of our common stock , calculated as the percentage of shares of common stock freely traded by public investors divided by our total shares outstanding , is significantly lower than that of its publicly traded peers . this circumstance does not impact the fair value of the company , however based on its evaluation of third party market data , we believe it does lead to an inherent marketability discount impacting its stock price . impairment assessment inherently involves management judgments as to the assumptions used for projections and to evaluate the impact of market conditions on those assumptions . the key assumptions that we use to estimate the fair value of our reporting units under the income-based approach are as follows : · weighted average cost of capital used to discount the projected cash flows ; · cash flows generated from existing and new work awards ; and · projected operating margins . 38 weighted average cost of capital rates used to discount the projected cash flows are developed via the capital asset pricing model which is primarily based upon market inputs . we use discount rates that management feels are an accurate reflection of the risks associated with the forecasted cash flows of our respective reporting units . to develop the cash flows generated from new work awards and future operating margins , we primarily track prospective work for each of our reporting units on a project-by-project basis as well as the estimated timing of when the work would be bid or prequalified , started and completed . we also give consideration to our relationships with the prospective owners , the pool of competitors that are capable of performing large , complex work , changes in business strategy and the company 's history of success in winning new work in each reporting unit . with regard to operating margins , we give consideration to our historical reporting unit operating margins in the end markets that the prospective work opportunities are most significant , current market trends in recent new work procurement , and changes in business strategy . we also estimate the fair value of our reporting units under a market-based approach by applying industry-comparable multiples of revenues and operating earnings to our reporting units ' projected performance . the conditions and prospects of companies in the construction industry depend on common factors such as overall demand for services . changes in our assumptions or estimates could materially affect the determination of the fair value of a reporting unit . such changes in assumptions could be caused by : · terminations , suspensions , reductions in scope or delays in the start-up of the revenues and cash flows from backlog as well as the prospective work we track ; · reductions in available government , state and local agencies and non-residential private industry funding and spending ; · our ability to effectively compete for new work and maintain and grow market penetration in the regions that the company operates in ; · our ability to successfully control costs , work schedule , and project delivery ; or · broader market conditions , including stock market volatility in the construction industry and its impact on the weighted average cost of capital assumption . on a quarterly basis we consider whether events or changes in circumstances indicate that assets , including goodwill and intangible assets not subject to amortization might be impaired . in conjunction with this analysis , we evaluate whether our current market capitalization is less than our stockholders ' equity and specifically consider ( 1 ) changes in macroeconomic conditions , ( 2 ) changes in general economic conditions in the construction industry including any declines in market-dependent multiples , ( 3 ) cost factors such as increases in raw materials , labor , or other costs that have a negative effect on earnings and cash flows analyses , ( 4 ) a reconciliation of the implied control premium to a current market control premium , ( 5 ) target price assessments by third party analysts and ( 6 ) the impact of current market conditions on its forecast of future cash flows including consideration of specific projects in backlog , pending awards , or large prospect opportunities . we also evaluate our most recent assessment of the fair value for each of our reporting units , considering whether our current forecast of future cash flows is in line with those used in our annual impairment assessment and whether there are any significant changes in trends or any other material assumptions used . as of december 31 , 2013 , we have concluded that we do not have an impairment of our goodwill or our indefinite-lived intangible assets and that the estimated fair value of each reporting unit exceeds its carrying value . see note 4  goodwill and other intangible assets of the notes to consolidated financial statements in part iv , item 15. exhibits and financial statement schedu le for additional goodwill disclosure . fair value measurements  our investment in auction rate securities ( ars ) is measured at fair value utilizing unobservable ( level 3 ) inputs . we have determined the estimated fair values of these securities utilizing an income approach

