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Loans and Allowance for Loan Losses - Troubled Debt Restructurings (Details) $ in Millions | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Apr. 21, 2020 USD ($) loan | Mar. 31, 2020 loan | Mar. 31, 2019 loan | Dec. 31, 2019 USD ($)
Troubled debt restructuring |  |  |  |
Number of loans modified as modified as a troubled debt restructuring | loan |  | 0 |  |
Number of principal and interest deferrals in connection with the CARES Act | loan | 325 |  |  |
Loan principal and interest deferrals in connection with the CARES Act | $ | $ 97.4 |  |  |
Maximum |  |  |  |
Troubled debt restructuring |  |  |  |
Typical loan deferral period under the CARES Act | 90 days |  |  |
Interest Rate Below Market Reduction |  |  |  |
Troubled debt restructuring |  |  |  |
Number of loans modified as modified as a troubled debt restructuring | loan |  |  | 1 |
Carrying value of restructured loan | $ |  |  |  | $ 0.2
Specific reserve for loan losses allocated | $ |  |  |  | $ 0.0

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- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953676-111524 + Details
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