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Other Assets Other Assets (Tax Credits) (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Other Assets [Abstract] |  |
Investment in historic development entities | $ 2,216,000 | $ 1,653,000
Capital Contributions to Historic Rehabilitation Tax Credits | 9,400,000 | 2,000,000
Tax Credit Benefits Recognized on Federal Historic Tax Credits | 5,200,000 | 2,535,000
Expense Related to Investment in Historic Rehabilitation Tax Credits | 3,600,000 | 1,633,000
Gain on sale of investments | 413,000 |
Proceeds from sale of other investments |  | 0
Investment in a community development entity | $ 5,571,000 | 6,081,000
New Market Tax Credit Benefit, Period of Recognition | 7 years |
Federal New Market Tax Credits Not Yet Recognized | $ 450,000 |
Tax Credit Benefits Recognized on New Market Tax Credits | $ 450,000 | $ 450,000

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