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Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2022
Accounting Policies [Abstract] |
Schedule of Cumulative Effect of Adoption of CECL | The following table illustrates the impact of the cumulative effect adjustment made upon adoption of CECL on January 1, 2020:
|  | January 1, 2020
(Dollars in thousands) |  | As reported under CECL |  | Pre-CECL Adoption |  | Impact of CECL Adoption
Assets: |  |  |  |  |  |
Allowance for credit losses: |  |  |  |  |  |
Private Education Loans |  | $ | 1,435,130 |  |  | $ | 374,300 |  |  | $ | 1,060,830 |
FFELP Loans |  | 4,485 |  |  | 1,633 |  |  | 2,852 |
Personal Loans |  | 145,060 |  |  | 65,877 |  |  | 79,183 |
Credit Cards |  | 290 |  |  | 102 |  |  | 188 |
Total |  | $ | 1,584,965 |  |  | $ | 441,912 |  |  | $ | 1,143,053 |
Deferred tax asset |  | $ | 415,540 |  |  | $ | 109,369 |  |  | $ | 306,171 |
Liabilities: |  |  |  |  |  |
Allowance for credit losses: |  |  |  |  |  |
Off-balance sheet exposures |  | $ | 118,239 |  |  | $ | 2,481 |  |  | $ | 115,758 |
Equity: |  |  |  |  |  |
Retained Earnings |  | $ | 897,873 |  |  | $ | 1,850,512 |  |  | $ | (952,639) |

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- Definition Tabular disclosure of changes in accounting principles, including adoption of new accounting pronouncements, that describes the new methods, amount and effects on financial statement line items. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124431687&loc=d3e22499-107794 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 13 -URI https://asc.fasb.org/extlink&oid=126900757&loc=d3e765-108305 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 12 -URI https://asc.fasb.org/extlink&oid=126900757&loc=d3e725-108305 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 3 -URI https://asc.fasb.org/extlink&oid=124431687&loc=d3e22583-107794 + Details
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