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v3.23.1

Allowance for Credit Losses - Amortized Cost Basis of Financing Receivables that Subsequently Defaulted (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2023 | Mar. 31, 2022 | Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Modified Loans | $ 94,682 |  | $ 326,116
60 Days or Greater Past Due |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Modified Loans | 11,624 | $ 290 |
Payment Default(3) | 11,404 | 287 |
Charge-Offs | 4,628 | 0 |
Combination - Interest Rate Reduction and Term Extension |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Modified Loans | 10,400 | 300 |
Interest Rate Reduction |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Modified Loans | 1,200 | 0 |
Private Education Loans |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Modified Loans | 94,682 |  | $ 326,116
Private Education Loans | 60 Days or Greater Past Due |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Modified Loans | 11,624 | 290 |
Payment Default(3) | 11,404 | 287 |
Charge-Offs | $ 4,628 | $ 0 |

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount, after troubled debt restructuring, of modified financing receivable. + 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 https://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524 + Details
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- Definition Amount of financing receivable modified as troubled debt restructuring within previous 12 months, with subsequent payment default. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -Subparagraph (a)(2) -URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953682-111524 + Details
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