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Other Assets Accrued Interest Receivable and Other Assets (Details) - USD ($) $ in Thousands | Sep. 30, 2019 | Dec. 31, 2018
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Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] |  |
Accrued interest receivable | $ 5,599 | $ 5,684
Net deferred tax asset | 1,983 | 3,172
Investment in historic development entities | 2,013 | 1,653
Investment in a community development entity | 5,699 | 6,081
Investment in limited partnerships | 4,924 | 4,176
Investment in Trust II | 315 | 315
Fair value of interest rate swaps | 23,128 | 4,637
Prepaid expenses | 2,749 | 2,894
Other assets | 12,059 | 6,039
Total accrued interest receivable and other assets | $ 58,469 | $ 34,651

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