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Income taxes - Components of Net Deferred Tax Asset (Details) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Deferred tax assets: |  |
Allowance for loan losses | $ 4,541 | $ 3,618
Defined benefit plan | 2,752 | 2,648
Deferred compensation | 595 | 529
Capital loss carry forward | 244 | 244
Other | 440 | 259
Total | 8,572 | 7,298
Deferred tax liabilities: |  |
Premises and equipment, net | 771 | 912
Merger related accounting | 2,379 | 2,131
Investment securities available-for-sale | 1,607 | 2,202
Other | 530 | 324
Total | 5,287 | 5,569
Net deferred tax asset | $ 3,285 | $ 1,729

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