the company 's credit quality remained strong as non-performing assets represented 0.46 % of total assets at december 31 , 2018 compared to 0.58 % at december 31 , 2017. the ratio of net charge-offs to average loans was 0.01 % for 2018 , compared to 0.04 % for the prior year . 30 total assets at december 31 , 2018 increased 51 % compared to december 31 , 2017. this increase was primarily the result of the acquisition of washingtonfirst 's $ 2.1 billion of assets . total loans at december 31 , 2018 , were $ 6.6 billion compared to $ 4.3 billion at december 31 , 2017. post-acquisition asset growth has been primarily the result of net loan growth in 2018. loan balances increased 52 % compared to the prior year end as a result of the acquisition with post-acquisition portfolio growth of 9 % driven by the 13 % post-acquisition growth in commercial loans . the growth in commercial loans was driven by double digit increases in all commercial lending categories . customer funding sources , which include deposits plus other short-term borrowings from core customers , increased 6 % compared to post-acquisition balances . the increase in customer funding sources was driven by increases of 17 % in certificates of deposit and 22 % in money market savings accounts . the company utilizes low cost fhlb borrowings to assist in the management of the net interest margin . the effect on the net interest margin partially mitigates the increased rates offered on certificates of deposit and money market accounts to retain these deposit relationships in the rising interest rate environment . during the same period , stockholders ' equity increased to $ 1.1 billion at december 31 , 2018 from $ 564 million at december 31 , 2017 primarily due to the issuance of common stock to effect the acquisition of washingtonfirst . an additional portion of the growth in capital was due to net income in 2018 , which effect was partially offset by dividends paid to stockholders during 2018. net interest income increased 54 % compared to 2017 , due to the combination of the acquisition and organic loan growth . for the year ended december 31 , 2018 , the net interest margin was 3.60 % compared to 3.55 % for the prior year . net interest income for the year ended december 31 , 2018 includes $ 2.4 million in recovered interest income on acquired credit impaired loans . this amount compares to interest recoveries of $ 1.1 million for 2017. excluding these recoveries , the net interest margin would have been 3.58 % for the year ended december 31 , 2018 compared to 3.53 % for the year ended december 31 , 2017. the amortization of the fair value adjustments for 2018 was estimated to be 13 basis points on an annual basis . this favorable margin effect was partially offset by the impact that the current year 's reduction in the tax rate had on the tax-advantaged securities in the investment portfolio , which adversely affected the margin by 5 basis points . compared to the prior year , average interest-earning assets grew 48 % with an increase of 39 basis points in the yield while the rate on average interest-bearing liabilities , which grew 51 % from the prior year , increased 47 basis points over the same period . exclusive of investment securities gains of $ 0.2 million in 2018 and $ 1.3 million in 2017 , non-interest income increased 22 % for 2018 compared to 2017 due to increases in income from mortgage banking activities , wealth management and mortality insurance proceeds received during 2018 as compared to 2017. non-interest expenses for the year ended december 31 , 2018 increased 39 % to $ 179.8 million compared to $ 129.1 million for the prior year . the year-over-year increase in non-interest expense was 36 % excluding merger expense from both years in addition to the prior year 's prepayment penalties on the early pay-off of high rate fhlb advances . the majority of the increase was the result of the increase in the number of employees , additional branch and office locations and associated operating expenses that resulted from the acquisition of washingtonfirst . the net income for 2018 included the effect of merger expenses totaling $ 11.8 million and $ 2.4 million in recovered interest income from previously acquired credit impaired loans . the additional merger expenses , net of the interest recoveries , resulted in an after-tax reduction to earnings per share of approximately $ 0.19 per share for 2018. the net income for 2017 included the effects of the tax rate reduction associated with tax reform legislation passed at the end of 2017. this resulted in $ 5.5 million of additional income tax expense and in addition to merger expenses , net of tax , resulted in a reduction of 2017 earnings per share of approximately $ 0.34 per share . pre-tax , pre-provision income which adjusts for these items for both years , in addition to the provision for loan losses , increased 61 % from full-year 2017 to full-year 2018 to a record $ 153.5 million . critical accounting policies the company 's consolidated financial statements are prepared in accordance with generally accepted accounting principles ( “ gaap ” ) in the united states of america and follow general practices within the banking industry . application of these principles requires management to make estimates , assumptions , and judgments that affect the amounts reported in the financial statements and accompanying notes . these estimates , assumptions , and judgments are based on information available as of the date of the financial statements ; accordingly , as this information changes , the financial statements may reflect different estimates , assumptions , and judgments . story_separator_special_tag on those assets . on a tax-equivalent basis , net interest income for 2017 was $ 176.2 million compared to $ 156.3 million for 2016. the following table provides an analysis of net interest income performance that reflects a net interest margin that increased to 3.55 % for 2017 compared to 3.49 % for 2016. net interest income for 2017 included $ 1.1 million in interest recoveries on previously charged-off loans . exclusive of these recoveries the net interest margin would have been 3.53 % . average interest-earning assets increased by 11 % while average interest-bearing liabilities increased 10 % in 2017. the growth and increased rates earned on the interest-earning assets exceeded the growth and rates paid on interest-bearing liabilities , which resulted in the 13 % increase in net interest income year over year . average noninterest-bearing deposits increased 14 % in 2017 while the percentage of average noninterest-bearing deposits to total deposits increased to 33 % for 2017 compared to 32 % for 2016 . 35 replace_table_token_1_th 36 effect of volume and rate changes on net interest income the following table analyzes the reasons for the changes from year-to-year in the principal elements that comprise net interest income : 2018 vs. 2017 2017 vs. 2016 increase increase or due to change in average : * or due to change in average : * ( dollars in thousands and tax equivalent ) ( decrease ) volume rate ( decrease ) volume rate interest income from earning assets : residential mortgage loans $ 10,980 $ 8,959 $ 2,021 $ 2,317 $ 1,645 $ 672 residential construction loans 1,997 1,611 386 1,123 914 209 commercial ad & c loans 20,214 17,569 2,645 1,645 744 901 commercial investor real estate loans 49,567 43,978 5,589 9,448 10,272 ( 824 ) commercial owner occupied real estate loans 14,953 15,604 ( 651 ) 4,922 4,493 429 commercial business loans 15,914 11,993 3,921 835 203 632 consumer loans 6,634 2,830 3,804 1,338 271 1,067 loans held for sale 966 941 25 ( 108 ) ( 170 ) 62 taxable securities 6,990 6,342 648 2,449 1,487 962 tax-exempt securities ( 2,574 ) ( 581 ) ( 1,993 ) 803 747 56 interest-bearing deposits with banks 894 558 336 197 ( 19 ) 216 federal funds sold 4 ( 5 ) 9 22 13 9 total interest income 126,539 109,799 16,740 24,991 20,600 4,391 interest expense on funding of earning assets : interest-bearing demand deposits 376 95 281 61 61 - regular savings deposits 354 45 309 34 11 23 money market savings deposits 13,688 3,769 9,919 3,080 184 2,896 time deposits 11,465 8,931 2,534 1,920 1,012 908 other borrowings 832 122 710 47 34 13 advances from fhlb 8,982 6,656 2,326 816 1,903 ( 1,087 ) subordinated debentures 1,909 1,893 16 ( 931 ) ( 906 ) ( 25 ) total interest expense 37,606 21,511 16,095 5,027 2,299 2,728 net interest income $ 88,933 $ 88,288 $ 645 $ 19,964 $ 18,301 $ 1,663 * variances that are the combined effect of volume and rate , but can not be separately identified , are allocated to the volume and rate variances based on their respective relative amounts . 37 interest income 2018 vs. 2017 the company 's total tax-equivalent interest income increased 63 % during 2018 compared to the prior year as average loans and investments and their associated yields increased during the year . in 2018 , the average balance of the loan portfolio increased 52 % and average investments increased 25 % compared to the prior year . the increase in loans was primarily the result of the washingtonfirst acquisition coupled with the 9 % post-acquisition growth of the total loan portfolio . the post-acquisition organic loan growth was the result of greater market presence and the improvement in the regional economy . the yield on average loans increased by 48 basis points compared to the prior year due to higher yields on the entire loan portfolio due to the effect of the rising interest rate environment during 2018 from the multiple rate increases by the federal reserve . interest income for the year ended december 31 , 2018 included $ 2.4 million in recovered interest income on acquired credit impaired loans . this amount compares to interest recoveries of $ 1.1 million for 2017. exclusive of these recoveries , the yield on loans would have increased 46 basis points for the year ended december 31 , 2018 compared to the year ended december 31 , 2017. the average yield on total investment securities decreased 23 basis points while the average balance of the portfolio increased 25 % in 2018 compared to 2017. the decrease in the yield on investments was driven by the effect that the current year 's reduction in the corporate tax rate had on the tax-advantaged securities in the investment portfolio which caused a 70 basis point erosion in the yield on tax-exempt securities . 2017 vs. 2016 the company 's total tax-equivalent interest income increased 14 % for 2017 compared to the prior year as average loans and investments and their associated yields increased during the year . in 2017 , the average balance of the loan portfolio increased 11 % and average investments increased 10 % compared to the prior year . the growth in the loan portfolio was primarily in the commercial investor real estate and owner occupied portfolios . these increases were driven by organic loan growth as the regional economy continued to improve . the yield on average loans increased by 10 basis points compared to the prior year due to higher yields on the entire loan portfolio , as the commercial portfolio increased 5 basis points compared to the prior year . the yield on the portfolio benefited from the impact of multiple rate increases by the federal reserve during the year . exclusive of the $ 1.1 million in interest recoveries recognized during 2017 , the yield on the average loan portfolio would

liquidity management liquidity is measured by a financial institution 's ability to raise funds through loan repayments , maturing investments , deposit growth , borrowed funds , capital and the sale of highly marketable assets such as investment securities and residential mortgage loans . the company 's liquidity position , considering both internal and external sources available , exceeded anticipated short-term and long-term needs at december 31 , 2018. management considers core deposits , defined to include all deposits other than time deposits of $ 100 thousand or more , to be a relatively stable funding source . core deposits equaled 63 % of total interest-earning assets at december 31 , 2018 . in addition , loan payments , maturities , calls and pay downs of securities , deposit growth and earnings contribute a flow of funds available to meet liquidity requirements . in assessing liquidity , management considers operating requirements , the seasonality of deposit flows , investment , loan and deposit maturities and calls , expected funding of loans and deposit withdrawals , and the market values of available-for-sale investments , so that sufficient funds are available on short notice to meet obligations as they arise and to ensure that the company is able to pursue new business opportunities . in addition to factors discussed above that can affect liquidity , the company 's growth , mortgage banking activities and changes in the liquidity of the investment portfolio due to fluctuations in interest rates are also taken into consideration .


 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 management liquidity is measured by a financial institution 's ability to raise funds through loan repayments , maturing investments , deposit growth , borrowed funds , capital and the sale of highly marketable assets such as investment securities and residential mortgage loans . the company 's liquidity position , considering both internal and external sources available , exceeded anticipated short-term and long-term needs at december 31 , 2018. management considers core deposits , defined to include all deposits other than time deposits of $ 100 thousand or more , to be a relatively stable funding source . core deposits equaled 63 % of total interest-earning assets at december 31 , 2018 . in addition , loan payments , maturities , calls and pay downs of securities , deposit growth and earnings contribute a flow of funds available to meet liquidity requirements . in assessing liquidity , management considers operating requirements , the seasonality of deposit flows , investment , loan and deposit maturities and calls , expected funding of loans and deposit withdrawals , and the market values of available-for-sale investments , so that sufficient funds are available on short notice to meet obligations as they arise and to ensure that the company is able to pursue new business opportunities . in addition to factors discussed above that can affect liquidity , the company 's growth , mortgage banking activities and changes in the liquidity of the investment portfolio due to fluctuations in interest rates are also taken into consideration .
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 Suspicious Activity Report : the company 's credit quality remained strong as non-performing assets represented 0.46 % of total assets at december 31 , 2018 compared to 0.58 % at december 31 , 2017. the ratio of net charge-offs to average loans was 0.01 % for 2018 , compared to 0.04 % for the prior year . 30 total assets at december 31 , 2018 increased 51 % compared to december 31 , 2017. this increase was primarily the result of the acquisition of washingtonfirst 's $ 2.1 billion of assets . total loans at december 31 , 2018 , were $ 6.6 billion compared to $ 4.3 billion at december 31 , 2017. post-acquisition asset growth has been primarily the result of net loan growth in 2018. loan balances increased 52 % compared to the prior year end as a result of the acquisition with post-acquisition portfolio growth of 9 % driven by the 13 % post-acquisition growth in commercial loans . the growth in commercial loans was driven by double digit increases in all commercial lending categories . customer funding sources , which include deposits plus other short-term borrowings from core customers , increased 6 % compared to post-acquisition balances . the increase in customer funding sources was driven by increases of 17 % in certificates of deposit and 22 % in money market savings accounts . the company utilizes low cost fhlb borrowings to assist in the management of the net interest margin . the effect on the net interest margin partially mitigates the increased rates offered on certificates of deposit and money market accounts to retain these deposit relationships in the rising interest rate environment . during the same period , stockholders ' equity increased to $ 1.1 billion at december 31 , 2018 from $ 564 million at december 31 , 2017 primarily due to the issuance of common stock to effect the acquisition of washingtonfirst . an additional portion of the growth in capital was due to net income in 2018 , which effect was partially offset by dividends paid to stockholders during 2018. net interest income increased 54 % compared to 2017 , due to the combination of the acquisition and organic loan growth . for the year ended december 31 , 2018 , the net interest margin was 3.60 % compared to 3.55 % for the prior year . net interest income for the year ended december 31 , 2018 includes $ 2.4 million in recovered interest income on acquired credit impaired loans . this amount compares to interest recoveries of $ 1.1 million for 2017. excluding these recoveries , the net interest margin would have been 3.58 % for the year ended december 31 , 2018 compared to 3.53 % for the year ended december 31 , 2017. the amortization of the fair value adjustments for 2018 was estimated to be 13 basis points on an annual basis . this favorable margin effect was partially offset by the impact that the current year 's reduction in the tax rate had on the tax-advantaged securities in the investment portfolio , which adversely affected the margin by 5 basis points . compared to the prior year , average interest-earning assets grew 48 % with an increase of 39 basis points in the yield while the rate on average interest-bearing liabilities , which grew 51 % from the prior year , increased 47 basis points over the same period . exclusive of investment securities gains of $ 0.2 million in 2018 and $ 1.3 million in 2017 , non-interest income increased 22 % for 2018 compared to 2017 due to increases in income from mortgage banking activities , wealth management and mortality insurance proceeds received during 2018 as compared to 2017. non-interest expenses for the year ended december 31 , 2018 increased 39 % to $ 179.8 million compared to $ 129.1 million for the prior year . the year-over-year increase in non-interest expense was 36 % excluding merger expense from both years in addition to the prior year 's prepayment penalties on the early pay-off of high rate fhlb advances . the majority of the increase was the result of the increase in the number of employees , additional branch and office locations and associated operating expenses that resulted from the acquisition of washingtonfirst . the net income for 2018 included the effect of merger expenses totaling $ 11.8 million and $ 2.4 million in recovered interest income from previously acquired credit impaired loans . the additional merger expenses , net of the interest recoveries , resulted in an after-tax reduction to earnings per share of approximately $ 0.19 per share for 2018. the net income for 2017 included the effects of the tax rate reduction associated with tax reform legislation passed at the end of 2017. this resulted in $ 5.5 million of additional income tax expense and in addition to merger expenses , net of tax , resulted in a reduction of 2017 earnings per share of approximately $ 0.34 per share . pre-tax , pre-provision income which adjusts for these items for both years , in addition to the provision for loan losses , increased 61 % from full-year 2017 to full-year 2018 to a record $ 153.5 million . critical accounting policies the company 's consolidated financial statements are prepared in accordance with generally accepted accounting principles ( “ gaap ” ) in the united states of america and follow general practices within the banking industry . application of these principles requires management to make estimates , assumptions , and judgments that affect the amounts reported in the financial statements and accompanying notes . these estimates , assumptions , and judgments are based on information available as of the date of the financial statements ; accordingly , as this information changes , the financial statements may reflect different estimates , assumptions , and judgments . story_separator_special_tag on those assets . on a tax-equivalent basis , net interest income for 2017 was $ 176.2 million compared to $ 156.3 million for 2016. the following table provides an analysis of net interest income performance that reflects a net interest margin that increased to 3.55 % for 2017 compared to 3.49 % for 2016. net interest income for 2017 included $ 1.1 million in interest recoveries on previously charged-off loans . exclusive of these recoveries the net interest margin would have been 3.53 % . average interest-earning assets increased by 11 % while average interest-bearing liabilities increased 10 % in 2017. the growth and increased rates earned on the interest-earning assets exceeded the growth and rates paid on interest-bearing liabilities , which resulted in the 13 % increase in net interest income year over year . average noninterest-bearing deposits increased 14 % in 2017 while the percentage of average noninterest-bearing deposits to total deposits increased to 33 % for 2017 compared to 32 % for 2016 . 35 replace_table_token_1_th 36 effect of volume and rate changes on net interest income the following table analyzes the reasons for the changes from year-to-year in the principal elements that comprise net interest income : 2018 vs. 2017 2017 vs. 2016 increase increase or due to change in average : * or due to change in average : * ( dollars in thousands and tax equivalent ) ( decrease ) volume rate ( decrease ) volume rate interest income from earning assets : residential mortgage loans $ 10,980 $ 8,959 $ 2,021 $ 2,317 $ 1,645 $ 672 residential construction loans 1,997 1,611 386 1,123 914 209 commercial ad & c loans 20,214 17,569 2,645 1,645 744 901 commercial investor real estate loans 49,567 43,978 5,589 9,448 10,272 ( 824 ) commercial owner occupied real estate loans 14,953 15,604 ( 651 ) 4,922 4,493 429 commercial business loans 15,914 11,993 3,921 835 203 632 consumer loans 6,634 2,830 3,804 1,338 271 1,067 loans held for sale 966 941 25 ( 108 ) ( 170 ) 62 taxable securities 6,990 6,342 648 2,449 1,487 962 tax-exempt securities ( 2,574 ) ( 581 ) ( 1,993 ) 803 747 56 interest-bearing deposits with banks 894 558 336 197 ( 19 ) 216 federal funds sold 4 ( 5 ) 9 22 13 9 total interest income 126,539 109,799 16,740 24,991 20,600 4,391 interest expense on funding of earning assets : interest-bearing demand deposits 376 95 281 61 61 - regular savings deposits 354 45 309 34 11 23 money market savings deposits 13,688 3,769 9,919 3,080 184 2,896 time deposits 11,465 8,931 2,534 1,920 1,012 908 other borrowings 832 122 710 47 34 13 advances from fhlb 8,982 6,656 2,326 816 1,903 ( 1,087 ) subordinated debentures 1,909 1,893 16 ( 931 ) ( 906 ) ( 25 ) total interest expense 37,606 21,511 16,095 5,027 2,299 2,728 net interest income $ 88,933 $ 88,288 $ 645 $ 19,964 $ 18,301 $ 1,663 * variances that are the combined effect of volume and rate , but can not be separately identified , are allocated to the volume and rate variances based on their respective relative amounts . 37 interest income 2018 vs. 2017 the company 's total tax-equivalent interest income increased 63 % during 2018 compared to the prior year as average loans and investments and their associated yields increased during the year . in 2018 , the average balance of the loan portfolio increased 52 % and average investments increased 25 % compared to the prior year . the increase in loans was primarily the result of the washingtonfirst acquisition coupled with the 9 % post-acquisition growth of the total loan portfolio . the post-acquisition organic loan growth was the result of greater market presence and the improvement in the regional economy . the yield on average loans increased by 48 basis points compared to the prior year due to higher yields on the entire loan portfolio due to the effect of the rising interest rate environment during 2018 from the multiple rate increases by the federal reserve . interest income for the year ended december 31 , 2018 included $ 2.4 million in recovered interest income on acquired credit impaired loans . this amount compares to interest recoveries of $ 1.1 million for 2017. exclusive of these recoveries , the yield on loans would have increased 46 basis points for the year ended december 31 , 2018 compared to the year ended december 31 , 2017. the average yield on total investment securities decreased 23 basis points while the average balance of the portfolio increased 25 % in 2018 compared to 2017. the decrease in the yield on investments was driven by the effect that the current year 's reduction in the corporate tax rate had on the tax-advantaged securities in the investment portfolio which caused a 70 basis point erosion in the yield on tax-exempt securities . 2017 vs. 2016 the company 's total tax-equivalent interest income increased 14 % for 2017 compared to the prior year as average loans and investments and their associated yields increased during the year . in 2017 , the average balance of the loan portfolio increased 11 % and average investments increased 10 % compared to the prior year . the growth in the loan portfolio was primarily in the commercial investor real estate and owner occupied portfolios . these increases were driven by organic loan growth as the regional economy continued to improve . the yield on average loans increased by 10 basis points compared to the prior year due to higher yields on the entire loan portfolio , as the commercial portfolio increased 5 basis points compared to the prior year . the yield on the portfolio benefited from the impact of multiple rate increases by the federal reserve during the year . exclusive of the $ 1.1 million in interest recoveries recognized during 2017 , the yield on the average loan portfolio would

