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Income Tax - Reconciliation of Income Taxes (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Currently payable      
Federal $ 3,900 $ 5,582 $ 4,034
State (88) 120 44
Deferred 3,236 2,744 108
Total income tax expense 7,048 8,446 4,186
Reconciliation of federal statutory to actual tax expense      
Federal statutory income tax at 34% 9,424 9,800 5,774
Tax exempt interest (1,517) (1,419) (1,416)
Tax exempt income (362) (359) (457)
Other tax exempt income (342)    
Nondeductible and other (176) (177) 216
Effect of state income taxes 21 601 69
Total income tax expense $ 7,048 $ 8,446 $ 4,186