increase in the 2015 effective tax rate resulted from growth in pre-tax income taxed at the 35% federal rate, coupled with a reduction in tax-exempt income versus the comparable 2014 period.
Asset Quality
Non-accrual loans totaled $7.5 million or 0.48% of loans outstanding at September 30, 2015 versus $13.0 million or 0.96% of total loans outstanding at December 31, 2014 and $14.7 million or 1.16% of loans outstanding at September 30, 2014. The allowance for loan losses as a percentage of total non-accrual loans amounted to 271%, 148% and 128% at September 30, 2015, December 31, 2014 and September 30, 2014, respectively. Total accruing loans delinquent 30 days or more amounted to $1 million or 0.06% of loans outstanding at September 30, 2015 as compared to $1 million or 0.10% of loans outstanding at December 31, 2014 and $3 million or 0.25% of loans outstanding at September 30, 2014.
Total criticized and classified loans were $29 million at September 30, 2015 versus $40 million at December 31, 2014 and September 30, 2014. Criticized loans are those loans that are not classified but require some degree of heightened monitoring. Classified loans were $15 million at September 30, 2015 as compared to $30 million at December 31, 2014 and September 30, 2014. The allowance for loan losses as a percentage of total classified loans was 133%, 64% and 62%, respectively, at the same dates.
At September 30, 2015, the Company had $13 million in troubled debt restructurings ("TDRs"), primarily consisting of commercial and industrial loans, commercial real estate loans and residential mortgages totaling $1 million, $5 million and $5 million, respectively. The Company had TDRs amounting to $20 million at December 31, 2014 and September 30, 2014.
At September 30, 2015, the Company's allowance for loan losses amounted to $20.3 million or 1.30% of period-end loans outstanding. The allowance as a percentage of loans outstanding was 1.42% and 1.49% at December 31, 2014 and September 30, 2014, respectively. The Company recorded net loan charge-offs of $86 thousand in the third quarter of 2015 versus net loan recoveries of $726 thousand in the second quarter of 2015 and net loan recoveries of $72 thousand in the third quarter of 2014. As a percentage of average total loans outstanding, these net amounts represented, on an annualized basis, 0.02% for the third quarter of 2015, (0.21%) for the second quarter of 2015 and (0.02%) for the third quarter of 2014.
The Company held no OREO during any of the reported periods.
Capital
Total stockholders' equity was $197 million at September 30, 2015 compared to $183 million at December 31, 2014 and September 30, 2014. The increase in stockholders' equity versus September 30, 2014 was due principally to net income recorded during the past twelve months, net of dividends paid. The Company's return on average common stockholders' equity was 10.15% and 9.95% for the three and nine months ended September 30, 2015 versus 8.18% and 8.51%, respectively, for the comparable 2014 periods.
The Bank's tier 1 leverage, common equity tier 1 risk-based, tier 1 risk-based and total risk-based capital ratios were 9.78%, 11.77%, 11.77% and 13.01%, respectively, at September 30, 2015. Each of these ratios exceeds the regulatory guidelines for a "well capitalized" institution, the highest regulatory capital category.
The Company's capital ratios also exceeded all regulatory requirements at September 30, 2015. The Company's TCE ratio (non-GAAP financial measure) was 9.38% at September 30, 2015 versus 9.50% at December 31, 2014 and 10.07% at September 30, 2014.
Corporate Information
Suffolk Bancorp is a one-bank holding company engaged in the commercial banking business through Suffolk County National Bank, a full service commercial bank headquartered in Riverhead, New York and Suffolk Bancorp's wholly owned subsidiary. Organized in 1890, the Bank has 27 branch offices in Nassau, Suffolk and Queens Counties, New York. For more information about the Bank and its products and services, please visit www.scnb.com.