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Income Taxes
 12 Months Ended
Dec. 31, 2011
Income Taxes [Abstract]  
Income Taxes
14.  Income Taxes
 
The components of the provision for income taxes, exclusive of tax effect of unrealized securities gains, are as follows:

(in thousands)
 
2011
  
2010
  
2009
 
Current income tax expense
 $16,905  $14,393  $7,684 
Deferred income tax expense (benefit)
  (94)  219   2,918 
Total income tax expense
 $16,811  $14,612  $10,602 

A reconciliation of income tax expense at the statutory rate to our actual income tax expense is shown below:

(in thousands)
 
2011
  
2010
  
2009
 
Computed at the statutory rate
 $19,602   35.23% $16,818   35.71% $12,577   35.41%
Decrease resulting from:
                        
Tax-exempt interest
  (948)  (1.70)  (806)  (1.71)  (739)  (2.08)
Housing and new markets credits
  (1,007)  (1.81)  (507)  (1.08)  (654)  (1.84)
Dividends received deduction
  (183)  (0.33)  (172)  (0.36)  (188)  (0.53)
Bank owned life insurance
  (470)  (0.85)  (477)  (1.01)  (342)  (0.96)
ESOP dividend deduction
  (262)  (0.47)  (245)  (0.53)  (230)  (0.65)
Other, net
  79   0.14   1   0.01   178   0.50 
Total
 $16,811   30.21% $14,612   31.03% $10,602   29.85%

The components of the net deferred tax liability as of December 31 are as follows:

(in thousands)
 
2011
  
2010
 
Deferred tax assets:
      
Allowance for loan and lease losses
 $11,610  $12,852 
Interest on nonperforming loans
  883   1,427 
Accrued expenses
  356   582 
Dealer reserve valuation
  982   1,119 
Allowance for other real estate owned
  3,964   1,755 
Write-down of auction rate securities
  3,969   4,162 
Other
  317   688 
Total deferred tax assets
  22,080   22,585 
          
Deferred tax liabilities:
        
Depreciation and amortization
  (16,852)  (14,624)
FHLB stock dividends
  (4,956)  (4,985)
Loan fee income
  (1,092)  (1,288)
Mortgage servicing rights
  (799)  (1,106)
Capitalized lease obligations
  (766)  (2,275)
Unrealized gains on AFS securities
  (6,088)  (2,710)
Purchase accounting adjustments
  0   (354)
Other
  (1,028)  (1,460)
Total deferred tax liabilities
  (31,581)  (28,802)
          
Net deferred tax liability
 $(9,501) $(6,217)
 
CTBI accounts for income taxes in accordance with income tax accounting guidance (ASC 740, Income Taxes).  The income tax accounting guidance results in two components of income tax expense:  current and deferred.  Current income tax expense reflects taxes to be paid or refunded for the current period by applying the provisions of the enacted tax law to the taxable income or excess of deductions over revenues.  CTBI determines deferred income taxes using the liability (or balance sheet) method.  Under this method, the net deferred tax asset or liability is based on the tax effects of the differences between the book and tax bases of assets and liabilities, and enacted changes in tax rates and laws are recognized in the period in which they occur.  Deferred income tax expense results from changes in deferred tax assets and liabilities between periods.  Deferred tax assets are reduced by a valuation allowance if, based on the weight of evidence available, it is more likely than not that some portion or all of a deferred tax asset will not be realized.
 
Uncertain tax positions are recognized if it is more likely than not, based on the technical merits, that the tax position will be realized or sustained upon examination.  The term more likely than not means a likelihood of more than 50 percent; the terms examined and upon examination also include resolution of the related appeals or litigation processes, if any.  A tax position that meets the more-likely-than-not recognition threshold is initially and subsequently measured as the largest amount of tax benefit that has a greater than 50 percent likelihood of being realized upon settlement with a taxing authority that has full knowledge of all relevant information.  The determination of whether or not a tax position has met the more-likely-than-not recognition threshold considers the facts, circumstances, and information available at the reporting date and is subject to management's judgment.
 
With a few exceptions, CTBI is no longer subject to U.S. federal tax examinations by tax authorities for years before 2009, and state and local income tax examinations by tax authorities for years before 2007.  For federal tax purposes, CTBI recognizes interest and penalties on income taxes as a component of income tax expense.
 
CTBI files consolidated income tax returns with its subsidiaries.
 
A reconciliation of the beginning and ending amounts of unrecognized tax benefits under ASC 740 is shown below:

(in thousands)
 
2011
  
2010
 
Balance at January 1
 $163  $409 
Additions based on tax positions related to current year
  0   0 
Additions for tax positions of prior years
  0   20 
Reductions for tax positions of prior years
  0   (266)
Balance at December 31
 $163  $163