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Income taxes - Components of Net Deferred Tax Asset (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Deferred tax assets: |  |
Allowance for loan losses | $ 5,960 | $ 5,742
Lease liability | 1,846 | 1,349
Defined benefit plan |  | 1,108
Deferred compensation | 884 | 789
Deferred loan fees | 1,215 | 1,368
Investment securities available-for-sale | 379 |
Other | 86 | 170
Total | 10,370 | 10,526
Deferred tax liabilities: |  |
Lease right-of-use assets | 1,798 | 1,319
Premises and equipment, net | 1,441 | 1,455
Merger related accounting | 572 | 694
Deferred loan costs | 885 | 936
Defined benefit plan | 75 |
Investment securities available-for-sale |  | 2,033
Other | 244 | 321
Total | 5,015 | 6,758
Net deferred tax asset | $ 5,355 | $ 3,768

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