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Allowance for Credit Losses - Payment Status (Amortized Cost Basis) (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Payment Status (Amortized Cost Basis) | $ 326,116
Deferment |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Payment Status (Amortized Cost Basis) | 7,698
Current |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Payment Status (Amortized Cost Basis) | 289,134
30-59 Days Past Due |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Payment Status (Amortized Cost Basis) | 13,859
60-89 Days Past Due |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Payment Status (Amortized Cost Basis) | 8,809
90 Days or Greater Past Due |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Payment Status (Amortized Cost Basis) | 6,616
Private Education Loans |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Payment Status (Amortized Cost Basis) | 326,116
Private Education Loans | Deferment |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Payment Status (Amortized Cost Basis) | 7,698
Private Education Loans | Current |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Payment Status (Amortized Cost Basis) | 289,134
Private Education Loans | 30-59 Days Past Due |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Payment Status (Amortized Cost Basis) | 13,859
Private Education Loans | 60-89 Days Past Due |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Payment Status (Amortized Cost Basis) | 8,809
Private Education Loans | 90 Days or Greater Past Due |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Payment Status (Amortized Cost Basis) | $ 6,616

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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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