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Income Taxes (Tables)
12 Months Ended
Dec. 31, 2021
Income Taxes [Abstract]  
Provisions for Income Taxes
The provisions for income taxes consist of:
     
   
2021
   
2020
 
Federal current
 
$
710
   
$
1,376
 
State current
   
246
     
554
 
Federal deferred
   
311
     
247
 
State deferred
   
(109
)
   
(120
)
Federal investment tax credit, net of current utilization
   
(38
)
   
(39
)
Total income taxes
 
$
1,120
   
$
2,018
 
Reconciliation of Statutory Federal Tax Provision to Total Provision
A reconciliation of the statutory Federal tax provision to the total provision follows:
     
   
2021
   
2020
 
Statutory Federal tax provision
 
$
3,802
   
$
3,909
 
State income taxes, net of Federal benefit
   
177
     
426
 
IRS TPR deduction
   
(2,620
)
   
(1,979
)
Tax-exempt interest
   
(34
)
   
(29
)
Amortization of investment tax credit
   
(38
)
   
(39
)
Cash value of life insurance
   
(17
)
   
(110
)
Amortization of excess accumulated deferred income taxes
on accelerated depreciation
   
(182
)
   
(182
)
Other, net
   
32
     
22
 
Total income taxes
 
$
1,120
   
$
2,018
 
Deferred Tax Assets and Liabilities
The tax effects of temporary differences between book and tax balances that give rise to significant portions of the deferred tax assets and deferred tax liabilities as of December 31, 2021 and 2020 are summarized in the following table:

 
2021
   
2020
 
Deferred tax assets:
           
Reserve for doubtful accounts
 
$
247
   
$
189
 
Compensated absences
   
176
     
151
 
Deferred compensation
   
1,376
     
1,375
 
Excess accumulated deferred income taxes on accelerated depreciation
   
3,942
     
3,995
 
Deferred taxes associated with the gross-up of revenues necessary to
return, in rates, the effect of temporary differences
   
2,348
     
2,456
 
Customers’ advances for construction and contributions in aid of construction
   
1,545
     
1,815
 
Tax effect of pension regulatory liability
   
3,429
     
7
 
Other costs deducted for book, not for tax
   
74
     
64
 
Total deferred tax assets
   
13,137
     
10,052
 
                 
Deferred tax liabilities:
               
Accelerated depreciation
   
30,953
     
29,893
 
Basis differences from IRS TPR
   
16,912
     
13,671
 
Investment tax credit
   
329
     
356
 
Deferred taxes associated with the gross-up of revenues necessary to
recover, in rates, the effect of temporary differences
   
9,553
     
8,088
 
Pensions
   
4,060
     
638
 
Unamortized debt issuance costs
   
469
     
500
 
Other costs deducted for tax, not for book
   
451
     
444
 
Total deferred tax liabilities
   
62,727
     
53,590
 
                 
Net deferred tax liability
 
$
49,590
   
$
43,538