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Income Taxes - Significant Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Deferred tax assets |  |
Federal net operating loss carryforwards | $ 6,111 | $ 7,180
State net operating loss carryforwards | 541 | 1,338
Acquired loan basis | 587 | 1,159
Other real estate owned | 134 | 394
AMT credit carryforward | 2,855 | 2,855
Allowance for loan losses | 6,382 | 4,825
Unrealized loss on securities available for sale | 356 | 176
Accrued liabilities | 1,714 | 333
Other | 1,537 | 885
Total deferred tax assets | 20,217 | 19,145
Deferred tax liabilities |  |
Goodwill and intangible assets | 1,661 | 2,233
Fair value adjustment on junior subordinated debentures | 2,468 | 2,792
Premises and equipment | 4,804 | 2,273
Installment gain on sale of subsidiary | 2,292 | 2,230
Other | 299 | 396
Total deferred tax liabilities | 11,524 | 9,924
Net deferred tax asset before valuation allowance | 8,693 | 9,221
Valuation allowance | (255) | (262)
Net deferred tax asset | $ 8,438 | $ 8,959

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