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Income Taxes (Narrative) (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Income Tax [Line Items] |  |  |
Tax computed at statutory rate | 21.00% | 21.00% | 35.00%
Investments in affordable housing limited partnerships | $ 37,300,000 | $ 0 |
Tax year audited | 2016 |  |
Federal And State [Member] | From 2011 Through 2017 Tax Years [Member] |  |  |
Income Tax [Line Items] |  |  |
Tax credit carryforwards | $ 2,000,000.0 |  |
Tax credit carryforwards, originated tax years | 2015 through 2019 |  |
Federal And State [Member] | From 2011 Through 2017 Tax Years [Member] | Minimum [Member] |  |  |
Income Tax [Line Items] |  |  |
Tax credit carryforwards, expiration date | Dec. 31, 2022 |  |
State [Member] | 2004 Through 2017 Tax Years [Member] |  |  |
Income Tax [Line Items] |  |  |
Net operating loss carryforwards | $ 22,900,000 |  |
Operating loss carryforwards, originated tax years | 2004 through 2019 |  |
Net operating loss carryforwards, expiration date | Dec. 31, 2024 |  |

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- Definition Amount of investment in qualified affordable housing projects. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 740 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=116633289&loc=SL49122993-202985 + Details
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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32559-109319 + Details
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