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Income Taxes (Details 2) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Deferred tax assets: |  |
Bad debts | $ 1,885 | $ 2,872
Deferred loan fees | 32 | 60
Deferred compensation | 332 | 503
Unrealized depreciation on securities available-for-sale, net | 0 | 771
Net operating loss, state | 290 | 294
Tax credits | 99 | 98
Nonaccrual loan interest income | 71 | 109
Share based compensation | 133 | 126
REO writedowns | 25 | 0
Unqualified deferred compensation plan | 51 | 74
Other-than-temporary impairment | 57 | 92
Accrued vacation | 59 | 129
Impairment on land | 48 | 71
Other | 15 | 29
Total deferred tax assets | 3,097 | 5,228
Deferred tax liabilities: |  |
Depreciation | (641) | (850)
Prepaids | (237) | (346)
Mortgage servicing rights | (26) | (51)
Deferred stock dividends | (65) | (97)
Unrealized appreciation on securities available-for-sale, net | (188) | 0
Purchase accounting | (100) | (88)
Other | (209) | (181)
Total deferred tax liabilities | (1,466) | (1,613)
Valuation allowance | (80) | (98)
Net deferred tax asset | $ 1,551 | $ 3,517

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