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Investments in Qualified Affordable Housing Projects Investments in Qualified Affordable Housing Projects - Narrative (Details) - USD ($) | Sep. 30, 2019 | Dec. 31, 2018
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Equity Method Investments and Joint Ventures [Abstract] |  |
Carrying value of qualified affordable housing project investments | $ 4,841,000 | $ 6,037,000
Funding obligation related to qualified affordable housing projects | $ 0 |

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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 commitment or contingent commitments to qualified affordable housing project investments. + 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 (e) -URI http://asc.fasb.org/extlink&oid=116633289&loc=SL49122993-202985 + Details
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