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Income Taxes (Tables)
12 Months Ended
Dec. 31, 2014
Income Taxes [Abstract]  
Income tax expense reconciliation

Income tax expense differs from the amount computed by applying the statutory rate on book income subject to tax for the following reasons:

 

    (Thousands of Dollars)
    Years Ended December 31,
    2014   2013   2012
Income Tax at Statutory Rate   $ 9,786     $ 8,638     $ 7,420  
Tax Effect of:                        
  Utility Plant Related     (572     (527 )     (442 )
  State Income Taxes – Net     711       546       420  
  Employee Benefits     (6     (46 )     (23 )
  Other     18       10       8  
Total Income Tax Expense   $ 9,937     $ 8,621     $ 7,383  
Income tax expense

Income tax expense is comprised of the following:

 

    (Thousands of Dollars)
    Years Ended December 31,
    2014   2013   2012
Current:                        
   Federal   $ 5,920     $ 5,018     $ 2,994  
   State     887       688       430  
Deferred:                        
   Federal     3,018       2,855       3,832  
   State     191       139       206  
   Investment Tax Credits     (79     (79 )     (79 )
Total Income Tax Expense   $ 9,937     $ 8,621     $ 7,383  
Deferred tax liability
    (Thousands of Dollars)
    December 31,
    2014     2013  
Utility Plant Related   $ 43,996     $ 41,912  
Customer Advances     (3,570     (3,598 )
Employee Benefits     7,223       1,121  
Investment Tax Credits (ITC)     910       989  
Other     (343     (325 )
Total Deferred Tax Liability and ITC   $ 48,216     $ 40,099