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Income Taxes
3 Months Ended
Mar. 31, 2015
Income Tax Disclosure [Abstract]  
Income Taxes
Income Taxes

The tax provision for federal income taxes was $2.5 million for the first quarter of 2015, compared to $1.8 million for the same period in 2014. The effective tax rate was 31% for the quarter ended March 31, 2015 compared to 27% for the quarter ended March 31, 2014. The effective tax rate increased in the first three months of 2015 primarily due to the smaller proportion of tax-free interest income to the Company's total pretax net income.