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Other Assets Accrued Interest Receivable and Other Assets (Details) - USD ($) $ in Thousands | Mar. 31, 2019 | Dec. 31, 2018
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Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] |  |
Accrued interest receivable | $ 6,392 | $ 5,684
Net deferred tax asset | 3,151 | 3,172
Investment in historic development entities | 1,889 | 1,653
Investment in a community development entity | 5,954 | 6,081
Investment in limited partnerships | 4,127 | 4,176
Investment in Trust II | 315 | 315
Fair value of interest rate swaps | 8,337 | 4,637
Prepaid expenses | 2,952 | 2,894
Other assets | 7,597 | 6,039
Total accrued interest receivable and other assets | $ 40,714 | $ 34,651

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