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Commitments and Contingencies - Narrative (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020 | Jan. 01, 2020
--- | --- | --- | ---
Loss Contingencies [Line Items] |  |  |
ACL - OBS credit exposure | $ 14,273 | $ 14,373 |
Residential Mortgage |  |  |
Loss Contingencies [Line Items] |  |  |
Valuation allowances and reserves, balance | 1,100 | 1,100 |
ACL - OBS credit exposure | $ 9,700 | $ 9,100 |
Accounting Standards Update 2016-13 | Residential Mortgage |  |  |
Loss Contingencies [Line Items] |  |  |
Valuation allowances and reserves, balance |  |  | $ (2,100)

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- Definition Reserves associated with probable credit losses related to commitments to lend amounts to borrowers as of the balance sheet date. + References No definition available. + Details
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- Definition The fair value of financial liabilities, which are not recognized in the financial statements (off-balance sheet) because they fail to meet some other criterion for recognition. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13433-108611 + Details
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