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Fair Value Measurements - Debt Securities (Details) - Mortgage banking derivatives - Pricing Model - Fair Value, Inputs, Level 3 - Measurement Input, Pull Through Rate $ in Thousands | Sep. 30, 2020 USD ($) | Dec. 31, 2019 USD ($)
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Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Fair value | $ 6,015 | $ 280
Weighted Average |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Measurement input | 0.7844 | 0.7625
Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Measurement input | 0.699 |
Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Measurement input | 0.814 |

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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in net income (trading). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118954083&loc=d3e26610-111562 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118954083&loc=d3e26610-111562 + Details
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