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Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
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Income Tax Disclosure [Abstract] |  |
Federal alternative minimum tax credit and low income housing credit carry forwards |  | $ 2,485
Loans, including allowance for loan losses | 1,489 | 1,419
Net operating loss carry forwards | 383 | 529
State taxes | 398 | 413
Acquisition costs | 202 | 224
Deferred compensation arrangements | 78 | 88
Unrealized loss on investment securities available-for-sale | 1,295 | 132
Investments | 33 | 46
Other, net | 26 | 46
Total deferred tax assets | 3,904 | 5,382
Less valuation allowance | (383) | (529)
Total deferred tax assets, net of valuation allowance | 3,521 | 4,853
Undistributed equity earnings |  | 1,539
Premises and equipment, net of depreciation | 447 | 454
Mortgage servicing rights | 464 | 470
Prepaid expenses | 209 | 210
Intangible assets | 92 | 12
FHLB stock dividends | 56 | 74
Other borrowings |  | 35
Total deferred tax liabilities | 1,268 | 2,794
Net deferred tax asset | $ 2,253 | $ 2,059

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