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INCOME TAXES
3 Months Ended
Mar. 31, 2014
INCOME TAXES  
INCOME TAXES
 
9.
INCOME TAXES
 
The Company determines its periodic income tax provision (benefit) based upon the current period income and the annual estimated tax rate for the Company adjusted for any change to prior year estimates. The estimated tax rate is revised, if necessary, as of the end of each successive interim period during the fiscal year to the Company’s current annual estimated tax rate.
 
For the first quarter of 2014, the income tax provision reflects an effective tax rate of 31.6 percent, compared to an effective tax rate of 10.6 percent for the comparable period in the prior year.  The effective rate for the three months ended March 31, 2014 is the result of continued beneficial permanent differences including tax-exempt interest income and a favorable U.S. manufacturing deduction.  The 2013 effective tax rate reflects both the 2013 research and experimentation credit and the full year impact of the 2012 research and experimentation credit which was retroactively enacted into law in 2013.