XML 65 R14.htm IDEA: XBRL DOCUMENT v2.4.0.8
Income Tax
 6 Months Ended
Jun. 30, 2013
Income Tax Disclosure [Abstract]  
Income Tax Disclosure [Text Block]
8. INCOME TAX
The effective income tax rate varied from the combined federal and state statutory tax rates principally due to the following:

June 30,

2013
 
2012
Federal statutory tax rate
35.0
 %
 
35.0
 %
Increase (decrease):


 


Current state income tax, net of federal tax benefit
4.6

 
4.8

Amortization of investment and energy tax credits
(0.3
)
 
(0.3
)
Differences required to be flowed-through by regulatory commissions
2.3

 
1.5

Gains on company and trust-owned life insurance
(0.8
)
 
(0.7
)
Other, net
(0.1
)
 
0.3

Effective income tax rate
40.7
 %
 
40.6
 %


See Note 9 in the 2012 Form 10-K for more detail on income taxes and effective tax rates.