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Other Assets Accrued Interest Receivable and Other Assets (Details) - USD ($) $ in Thousands | Jun. 30, 2017 | Dec. 31, 2016
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Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] |  |
Accrued interest receivable | $ 4,428 | $ 4,677
Net deferred tax asset | 4,166 | 4,052
Investment in historic development entities | 737 | 737
Investment in a CDE | 6,846 | 7,106
Investment in limited partnerships | 4,540 | 3,963
Investment in Trust II | 315 | 315
Fair value of interest rate swaps | 873 | 352
Prepaid expenses | 3,394 | 3,074
Other assets | 4,491 | 4,331
Total accrued interest receivable and other assets | $ 29,790 | $ 28,607

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