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Income Taxes (Details 2) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | --- | ---
Deferred tax assets |  |  |
Allowance for loan losses | $ 1,665 | $ 2,627 | $ 2,377
Net deferred loan fees | 63 | 98 | 104
Unrealized losses on available-for-sale securities | 38 |  |
Other | 165 | 361 | 757
Deferred Tax Assets, Gross | 1,931 | 3,086 | 3,238
Deferred tax liabilities |  |  |
Depreciation | (926) | (1,385) | (1,335)
Mortgage servicing rights | (2,162) | (2,930) | (2,468)
Unrealized gains on available-for-sale securities |  | (26) | (335)
Purchase accounting adjustments | (1,102) | (1,659) | (1,489)
Prepaids | (169) | (188) | (285)
FHLB stock dividends | (288) | (466) | (465)
Deferred Tax Liabilities, Gross | (4,647) | (6,654) | (6,377)
Net deferred tax liability | $ (2,716) | $ (3,568) | $ (3,139)

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