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Income Tax - Reconciliation of Income Taxes (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Currently payable |  |  |
Federal | $ 5,270 | $ 4,710 | $ 3,900
State | 241 | (149) | (88)
Deferred | 1,721 | 1,594 | 3,236
Total income tax expense | 7,232 | 6,155 | 7,048
Reconciliation of federal statutory to actual tax expense |  |  |
Federal statutory income tax at 35% | 9,724 | 8,488 | 9,424
Tax exempt interest | (1,708) | (1,628) | (1,517)
Tax exempt income | (488) | (366) | (362)
Other tax exempt income | (199) | (309) | (342)
Nondeductible and other | (97) | (30) | (176)
Effect of state income taxes |  |  | 21
Total income tax expense | $ 7,232 | $ 6,155 | $ 7,048

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