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Income Taxes - Effects of Temporary Differences of Deferred Tax Assets and Deferred Tax Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Deferred tax assets: |  |
Allowance for loan losses | $ 1,749 | $ 1,354
Deferred compensation | 973 | 1,040
Deferred commissions and fees | 260 | 337
Impairment of other real estate owned | 9 | 52
Federal net operating loss carryforwards |  | 655
State net operating loss carryforwards | 192 | 270
Federal alternative minimum tax and general business credits carryforwards | 42 | 107
Unrealized loss on securities available-for-sale | 426 | 71
Unrealized loss on cash flow hedges | 443 | 1
Other | 658 | 630
Total gross deferred tax assets | 4,326 | 4,517
Deferred tax liabilities: |  |
Premises and equipment | 1,311 | 1,205
Core deposit intangible | 245 | 347
Limited partnerships | 138 | 135
Unrealized loss on securities available-for-sale | 426 | 71
Other | 231 | 79
Total gross deferred tax liabilities | 2,351 | 1,766
Net deferred tax asset, included in other assets | $ 1,975 | $ 2,751

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