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Other Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
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Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] |  |
Accrued interest receivable | $ 5,019 | $ 4,677
Net deferred tax asset | 2,584 | 4,052
Investment in Historic Development Entities | 1,161 | 737
Investment in Community Development Entities | 6,591 | 7,106
Investment in limited partnerships | 4,261 | 3,963
Investment in Trust II | 315 | 315
Fair value of interest rate swaps | 942 | 352
Prepaid expenses | 3,091 | 3,074
Other assets | 5,884 | 4,331
Total accrued interest receivable and other assets | $ 29,848 | $ 28,607

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