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INCOME TAX (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Income tax expense      
Currently payable $ 4,419 $ 3,746 $ 3,885
Deferred 1,731 (1,165) (4,708)
Change in valuation allowance (123) 1,157 1,062
Total income tax expense 6,027 3,738 239
Differences between effective tax rates and the federal statutory rate applied to income before income taxes      
Federal statutory income tax rate (as a percent) 35.00% 35.00% 35.00%
Federal statutory income tax 11,650 9,643 5,264
Tax exempt interest (4,527) (4,631) (3,999)
Effect of state income taxes 192 72 29
Non-deductible expenses 349 163 135
Tax exempt income on life insurance (422) (469) (460)
Tax credits (861) (898) (717)
Other (354) (142) (13)
Total income tax expense $ 6,027 $ 3,738 $ 239