we have determined that we operate as one reporting unit for evaluating goodwill . we have the option to qualitatively or quantitatively assess goodwill for impairment and , in 2013 , evaluated our goodwill using a quantitative assessment process . we test goodwill for impairment using the adjusted present value method ( “ apv ” ) to estimate the fair value of our reporting unit . under the apv method , future cash flows are based on recently prepared budget forecasts and business plans and are used to estimate the future economic benefits that the reporting unit will generate . an estimate of the appropriate discount rate is utilized to convert the future economic benefits to their present value equivalent . the quantitative goodwill impairment test is a two-step process . the first step identifies potential impairments by comparing the calculated fair value of a reporting unit with its book value . if the fair value of the reporting unit exceeds the carrying amount , goodwill is not impaired and the second step is not necessary . if the carrying value exceeds the fair value , the second step includes determining the implied fair value in the same manner as the amount of goodwill recognized in a business combination is determined . the implied fair value of goodwill is then compared with the carrying amount to determine if an impairment loss should be recorded . as of december 31 , 2013 , we had $ 49.5 million of goodwill on our balance sheet . the first step of our annual goodwill impairment analysis , which we perform as of october 1 of each year , did not result in an indication of impairment in 2013 , 2012 or 2011. the fair value of the reporting unit as of december 31 , 2013 , using the apv method , was 132 % greater than the carrying value at december 31 , 2013. we have determined the appropriate unit of accounting for testing franchise rights for impairment is on an individual store basis . we have the option to qualitatively or quantitatively assess indefinite-lived intangible assets for impairment . in 2013 , we evaluated our indefinite-lived intangible assets using a quantitative assessment process . we estimate the fair value of our franchise rights primarily using the multi-period excess earnings ( “ mpee ” ) model . the forecasted cash flows used in the mpee model contain inherent uncertainties , including significant estimates and assumptions related to growth rates , margins , general operating expenses , and cost of capital . we use primarily internally-developed forecasts and business plans to estimate the future cash flows that each franchise will generate . we have determined that only certain cash flows of the store are directly attributable to the franchise rights . we estimate the appropriate interest rate to discount future cash flows to their present value equivalent taking into consideration factors such as a risk-free rate , a peer group average beta , an equity risk premium and a small stock risk premium . we also may use a market approach to determine the fair value of our franchise rights . these market data points include our acquisition and divestiture experience and third-party broker estimates . as of december 31 , 2013 , we had $ 71.2 million of franchise value on our balance sheet associated with 57 stores . no individual store accounted for more than 12 % of our total franchise value as of december 31 , 2013. our impairment testing of franchise value did not indicate any impairment in 2013 , 2012 or 2011 . 32 we are subject to financial statement risk to the extent that our goodwill or franchise rights become impaired due to decreases in the fair value . a future decline in performance , decreases in projected growth rates or margin assumptions or changes in discount rates could result in a potential impairment , which could have a material adverse impact on our financial position and results of operations . furthermore , if a manufacturer becomes insolvent , we may be required to record a partial or total impairment on the franchise value related to that manufacturer . see notes 1 and 5 of notes to consolidated financial statements for additional information . long-lived assets we estimate the depreciable lives of our property and equipment , including leasehold improvements , and review each asset group for impairment when events or circumstances indicate that their carrying amounts may not be recoverable . we determined an asset group is comprised of the long-lived assets used in the operations of an individual store . we determine a triggering event has occurred by reviewing store forecasted and historical financial performance . an asset group is evaluated for recoverability if it has an operating loss in the current year and two of the prior three years . additionally , we may judgmentally evaluate an asset group if its financial performance indicates it may not support the carrying amount of the long-lived assets . if a store meets these criteria , we estimate the projected undiscounted cash flows for each asset group based on internally developed forecasts . if the undiscounted cash flows are lower than the carrying value of the asset group , we determine the fair value of the asset group based on additional market data , including recent experience in selling similar assets . we hold certain property for future development or investment purposes . if a triggering event is deemed to have occurred , we evaluate the property for impairment by comparing its estimated fair value based on listing price less costs to sell and other market data , including similar property that is for sale or has been recently sold , to the current carrying value . if the carrying value is more than the estimated fair value , an impairment is recorded . story_separator_special_tag selling , general and administrative expense ( “ sg & a ” ) sg & a includes salaries and related personnel expenses , advertising ( net of manufacturer cooperative advertising credits ) , rent , facility costs , and other general corporate expenses . replace_table_token_23_th replace_table_token_24_th 42 replace_table_token_25_th replace_table_token_26_th sg & a expense increased $ 53.7 million in 2013 compared to 2012. these increases were primarily driven by increased variable costs associated with improved sales and increases in advertising as we focused on gaining market share . additionally , in 2013 , we recorded a $ 6.2 million expense in other associated with a non-core legal reserve related to the settlement of a claim filed in 2006. this was offset by a $ 2.5 million non-core gain on the sale of property , which was recorded as a component of facility costs . in 2012 , sg & a expense increased $ 57.0 million as variable costs increased associated with sales growth . these increases in cost were offset by a continued focus on maintaining fixed costs . additionally , we recorded a non-core gain of $ 6.9 million on the sale of property as a component of facility costs in 2011. sg & a as a percentage of gross profit was 67.7 % in 2013 compared to 69.3 % in 2012 and 71.1 % in 2011. excluding the non-core legal reserve and gain on the sale of property in 2013 and the gain on the sale of property in 2011 , sg & a expense as a percentage of gross profit was 67.2 % in 2013 compared to 69.4 % in 2012 and 72.5 % in 2011. see “ non-gaap reconciliations ” in management 's discussion and analysis of financial condition and results of operations for more details . as sales volume increases and we further leverage our cost structure , we anticipate maintaining sg & a as a percentage of gross profit in the upper 60 % range in 2014. we also measure the leverage of our cost structure by evaluating throughput , which is the incremental percentage of gross profit retained after deducting sg & a expense . replace_table_token_27_th replace_table_token_28_th throughput contributions for newly opened or acquired stores reduce overall throughput as in the first year of operation , a store 's throughput is equal to the inverse of their sg & a as a percentage of gross profit . for example , a store which achieves sg & a as a percentage of gross profit of 70 % will have throughput of 30 % in the first year of operation . 43 we acquired six stores and opened one new store in 2013 and acquired four stores and opened two new stores in 2012. adjusting for these locations and the non-core adjustments discussed above , our throughput contribution on a same store basis was 51.4 % for the year ended december 31 , 2013 compared to 2012. our throughput contribution on a same store basis for 2012 compared to 2011 was 51.2 % . we continue to target a same store throughput contribution of approximately 50 % . depreciation and amortization depreciation and amortization is comprised of depreciation expense related to buildings , significant remodels or improvements , furniture , tools , equipment and signage and amortization of certain intangible assets , including customer lists and non-compete agreements . year ended december 31 , % ( dollars in thousands ) 2013 2012 increase increase depreciation and amortization $ 20,035 $ 17,128 $ 2,907 17.0 % year ended december 31 , % ( dollars in thousands ) 2012 2011 increase increase depreciation and amortization $ 17,128 $ 16,427 $ 701 4.3 % depreciation and amortization increased $ 2.9 million in 2013 compared to 2012 , and $ 0.7 million in 2012 compared to 2011 , as we purchased previously leased facilities , built new facilities subsequent to the acquisition of stores and invested in improvements at our facilities and replacement of equipment . these investments increase the amount of depreciable assets and amortizable expenses . operating income operating income was 4.6 % , 4.5 % and 4.2 % of revenue , respectively , in 2013 , 2012 and 2011. the increases in 2013 compared to 2012 , and 2012 compared to 2011 were primarily due to improved sales and continued cost control . floor plan interest expense and floor plan assistance floor plan interest expense decreased $ 0.4 million in 2013 compared to 2012. changes in the average outstanding balances on our floor plan facilities increased the expense $ 2.6 million , changes in the interest rates on our floor plan facilities decreased the expense $ 0.7 million and the maturity of three interest rate swaps decreased the expense $ 2.3 million . floor plan interest expense increased $ 2.5 million in 2012 compared to 2011. changes in the average outstanding balances on our floor plan facilities increased the expense $ 3.5 million and changes in the interest rates on our floor plan facilities decreased the expense $ 1.8 million during 2012 compared to 2011. ineffectiveness from hedging interest rate swaps increased the expense $ 0.8 million . floor plan assistance is provided by manufacturers to support store financing of new vehicle inventory . under accounting standards , floor plan assistance is recorded as a component of new vehicle gross profit when the specific vehicle is sold . however , because manufacturers provide this assistance to offset inventory carrying costs , we believe a comparison of floor plan interest expense to floor plan assistance is a useful measure of the efficiency of our new vehicle sales relative to stocking levels . 44 the following tables detail the carrying costs for new vehicles and include new vehicle floor plan interest net of floor plan assistance earned . replace_table_token_29_th replace_table_token_30_th other interest expense other interest expense includes interest on debt incurred related to acquisitions , real estate mortgages and our used vehicle inventory financing facility and our revolving line

liquidity and capital resources we manage our liquidity and capital resources to be able to fund our operating , investing and financing activities . we rely primarily on cash flows from operations and borrowings under our credit agreements as the main sources for liquidity . we use those funds to invest in capital expenditures , increase working capital and fulfill contractual obligations . funds available for reinvestment in our business are used for acquisitions as well as management of our capital structure through debt retirement , cash dividends and share repurchases . available sources below is a summary of our immediately available funds ( in thousands ) : replace_table_token_36_th our cash flows generated by operating activities and our credit facility are our most significant sources of liquidity . we have a $ 1.0 billion revolving syndicated credit facility which matures in december 2018. this facility provides new vehicle inventory floor plan financing , used vehicle inventory financing and a revolving line of credit for general corporate purposes . 48 we also have the ability to raise funds through mortgaging real estate . as of december 31 , 2013 , our unencumbered owned operating real estate had a book value of $ 181.0 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 we manage our liquidity and capital resources to be able to fund our operating , investing and financing activities . we rely primarily on cash flows from operations and borrowings under our credit agreements as the main sources for liquidity . we use those funds to invest in capital expenditures , increase working capital and fulfill contractual obligations . funds available for reinvestment in our business are used for acquisitions as well as management of our capital structure through debt retirement , cash dividends and share repurchases . available sources below is a summary of our immediately available funds ( in thousands ) : replace_table_token_36_th our cash flows generated by operating activities and our credit facility are our most significant sources of liquidity . we have a $ 1.0 billion revolving syndicated credit facility which matures in december 2018. this facility provides new vehicle inventory floor plan financing , used vehicle inventory financing and a revolving line of credit for general corporate purposes . 48 we also have the ability to raise funds through mortgaging real estate . as of december 31 , 2013 , our unencumbered owned operating real estate had a book value of $ 181.0 million .
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 Suspicious Activity Report : we have determined that we operate as one reporting unit for evaluating goodwill . we have the option to qualitatively or quantitatively assess goodwill for impairment and , in 2013 , evaluated our goodwill using a quantitative assessment process . we test goodwill for impairment using the adjusted present value method ( “ apv ” ) to estimate the fair value of our reporting unit . under the apv method , future cash flows are based on recently prepared budget forecasts and business plans and are used to estimate the future economic benefits that the reporting unit will generate . an estimate of the appropriate discount rate is utilized to convert the future economic benefits to their present value equivalent . the quantitative goodwill impairment test is a two-step process . the first step identifies potential impairments by comparing the calculated fair value of a reporting unit with its book value . if the fair value of the reporting unit exceeds the carrying amount , goodwill is not impaired and the second step is not necessary . if the carrying value exceeds the fair value , the second step includes determining the implied fair value in the same manner as the amount of goodwill recognized in a business combination is determined . the implied fair value of goodwill is then compared with the carrying amount to determine if an impairment loss should be recorded . as of december 31 , 2013 , we had $ 49.5 million of goodwill on our balance sheet . the first step of our annual goodwill impairment analysis , which we perform as of october 1 of each year , did not result in an indication of impairment in 2013 , 2012 or 2011. the fair value of the reporting unit as of december 31 , 2013 , using the apv method , was 132 % greater than the carrying value at december 31 , 2013. we have determined the appropriate unit of accounting for testing franchise rights for impairment is on an individual store basis . we have the option to qualitatively or quantitatively assess indefinite-lived intangible assets for impairment . in 2013 , we evaluated our indefinite-lived intangible assets using a quantitative assessment process . we estimate the fair value of our franchise rights primarily using the multi-period excess earnings ( “ mpee ” ) model . the forecasted cash flows used in the mpee model contain inherent uncertainties , including significant estimates and assumptions related to growth rates , margins , general operating expenses , and cost of capital . we use primarily internally-developed forecasts and business plans to estimate the future cash flows that each franchise will generate . we have determined that only certain cash flows of the store are directly attributable to the franchise rights . we estimate the appropriate interest rate to discount future cash flows to their present value equivalent taking into consideration factors such as a risk-free rate , a peer group average beta , an equity risk premium and a small stock risk premium . we also may use a market approach to determine the fair value of our franchise rights . these market data points include our acquisition and divestiture experience and third-party broker estimates . as of december 31 , 2013 , we had $ 71.2 million of franchise value on our balance sheet associated with 57 stores . no individual store accounted for more than 12 % of our total franchise value as of december 31 , 2013. our impairment testing of franchise value did not indicate any impairment in 2013 , 2012 or 2011 . 32 we are subject to financial statement risk to the extent that our goodwill or franchise rights become impaired due to decreases in the fair value . a future decline in performance , decreases in projected growth rates or margin assumptions or changes in discount rates could result in a potential impairment , which could have a material adverse impact on our financial position and results of operations . furthermore , if a manufacturer becomes insolvent , we may be required to record a partial or total impairment on the franchise value related to that manufacturer . see notes 1 and 5 of notes to consolidated financial statements for additional information . long-lived assets we estimate the depreciable lives of our property and equipment , including leasehold improvements , and review each asset group for impairment when events or circumstances indicate that their carrying amounts may not be recoverable . we determined an asset group is comprised of the long-lived assets used in the operations of an individual store . we determine a triggering event has occurred by reviewing store forecasted and historical financial performance . an asset group is evaluated for recoverability if it has an operating loss in the current year and two of the prior three years . additionally , we may judgmentally evaluate an asset group if its financial performance indicates it may not support the carrying amount of the long-lived assets . if a store meets these criteria , we estimate the projected undiscounted cash flows for each asset group based on internally developed forecasts . if the undiscounted cash flows are lower than the carrying value of the asset group , we determine the fair value of the asset group based on additional market data , including recent experience in selling similar assets . we hold certain property for future development or investment purposes . if a triggering event is deemed to have occurred , we evaluate the property for impairment by comparing its estimated fair value based on listing price less costs to sell and other market data , including similar property that is for sale or has been recently sold , to the current carrying value . if the carrying value is more than the estimated fair value , an impairment is recorded . story_separator_special_tag selling , general and administrative expense ( “ sg & a ” ) sg & a includes salaries and related personnel expenses , advertising ( net of manufacturer cooperative advertising credits ) , rent , facility costs , and other general corporate expenses . replace_table_token_23_th replace_table_token_24_th 42 replace_table_token_25_th replace_table_token_26_th sg & a expense increased $ 53.7 million in 2013 compared to 2012. these increases were primarily driven by increased variable costs associated with improved sales and increases in advertising as we focused on gaining market share . additionally , in 2013 , we recorded a $ 6.2 million expense in other associated with a non-core legal reserve related to the settlement of a claim filed in 2006. this was offset by a $ 2.5 million non-core gain on the sale of property , which was recorded as a component of facility costs . in 2012 , sg & a expense increased $ 57.0 million as variable costs increased associated with sales growth . these increases in cost were offset by a continued focus on maintaining fixed costs . additionally , we recorded a non-core gain of $ 6.9 million on the sale of property as a component of facility costs in 2011. sg & a as a percentage of gross profit was 67.7 % in 2013 compared to 69.3 % in 2012 and 71.1 % in 2011. excluding the non-core legal reserve and gain on the sale of property in 2013 and the gain on the sale of property in 2011 , sg & a expense as a percentage of gross profit was 67.2 % in 2013 compared to 69.4 % in 2012 and 72.5 % in 2011. see “ non-gaap reconciliations ” in management 's discussion and analysis of financial condition and results of operations for more details . as sales volume increases and we further leverage our cost structure , we anticipate maintaining sg & a as a percentage of gross profit in the upper 60 % range in 2014. we also measure the leverage of our cost structure by evaluating throughput , which is the incremental percentage of gross profit retained after deducting sg & a expense . replace_table_token_27_th replace_table_token_28_th throughput contributions for newly opened or acquired stores reduce overall throughput as in the first year of operation , a store 's throughput is equal to the inverse of their sg & a as a percentage of gross profit . for example , a store which achieves sg & a as a percentage of gross profit of 70 % will have throughput of 30 % in the first year of operation . 43 we acquired six stores and opened one new store in 2013 and acquired four stores and opened two new stores in 2012. adjusting for these locations and the non-core adjustments discussed above , our throughput contribution on a same store basis was 51.4 % for the year ended december 31 , 2013 compared to 2012. our throughput contribution on a same store basis for 2012 compared to 2011 was 51.2 % . we continue to target a same store throughput contribution of approximately 50 % . depreciation and amortization depreciation and amortization is comprised of depreciation expense related to buildings , significant remodels or improvements , furniture , tools , equipment and signage and amortization of certain intangible assets , including customer lists and non-compete agreements . year ended december 31 , % ( dollars in thousands ) 2013 2012 increase increase depreciation and amortization $ 20,035 $ 17,128 $ 2,907 17.0 % year ended december 31 , % ( dollars in thousands ) 2012 2011 increase increase depreciation and amortization $ 17,128 $ 16,427 $ 701 4.3 % depreciation and amortization increased $ 2.9 million in 2013 compared to 2012 , and $ 0.7 million in 2012 compared to 2011 , as we purchased previously leased facilities , built new facilities subsequent to the acquisition of stores and invested in improvements at our facilities and replacement of equipment . these investments increase the amount of depreciable assets and amortizable expenses . operating income operating income was 4.6 % , 4.5 % and 4.2 % of revenue , respectively , in 2013 , 2012 and 2011. the increases in 2013 compared to 2012 , and 2012 compared to 2011 were primarily due to improved sales and continued cost control . floor plan interest expense and floor plan assistance floor plan interest expense decreased $ 0.4 million in 2013 compared to 2012. changes in the average outstanding balances on our floor plan facilities increased the expense $ 2.6 million , changes in the interest rates on our floor plan facilities decreased the expense $ 0.7 million and the maturity of three interest rate swaps decreased the expense $ 2.3 million . floor plan interest expense increased $ 2.5 million in 2012 compared to 2011. changes in the average outstanding balances on our floor plan facilities increased the expense $ 3.5 million and changes in the interest rates on our floor plan facilities decreased the expense $ 1.8 million during 2012 compared to 2011. ineffectiveness from hedging interest rate swaps increased the expense $ 0.8 million . floor plan assistance is provided by manufacturers to support store financing of new vehicle inventory . under accounting standards , floor plan assistance is recorded as a component of new vehicle gross profit when the specific vehicle is sold . however , because manufacturers provide this assistance to offset inventory carrying costs , we believe a comparison of floor plan interest expense to floor plan assistance is a useful measure of the efficiency of our new vehicle sales relative to stocking levels . 44 the following tables detail the carrying costs for new vehicles and include new vehicle floor plan interest net of floor plan assistance earned . replace_table_token_29_th replace_table_token_30_th other interest expense other interest expense includes interest on debt incurred related to acquisitions , real estate mortgages and our used vehicle inventory financing facility and our revolving line

