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v3.25.2

Fair Value Measurements - Fair Values of Financial Assets and Liabilities, Including Derivative Financial Instruments (Details) - USD ($) $ in Thousands | Jun. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Earning assets: |  |
Trading investments | $ 49,600 | $ 53,262
Accrued interest receivable, difference | 139,176 | 116,884
Derivative instruments | 0 | 0
Total earning assets, difference | 3,536,974 | 3,325,107
Interest-bearing liabilities: |  |
Long-term borrowings, difference | 116,104 | 116,961
Derivative instruments | 53 | 40
Total interest-bearing liabilities, difference | 97,016 | 86,316
Excess of net asset fair value over carrying value | 3,633,990 | 3,411,423
Money-market and savings accounts |  |
Interest-bearing liabilities: |  |
Deposits, difference | 13,674 | 22,593
Certificates of deposit |  |
Interest-bearing liabilities: |  |
Deposits, difference | (32,762) | (53,238)
Fair Value |  |
Earning assets: |  |
Cash and cash equivalents | 4,092,465 | 4,700,366
Trading investments | 49,600 | 53,262
Available-for-sale investments | 1,650,656 | 1,933,226
Accrued interest receivable | 1,834,874 | 1,663,474
Derivative instruments | 2 | 0
Total earning assets | 32,185,727 | 32,460,709
Interest-bearing liabilities: |  |
Long-term borrowings | 6,294,874 | 6,323,384
Accrued interest payable | 109,207 | 108,488
Derivative instruments | 55 | 40
Total interest-bearing liabilities | 26,901,679 | 27,529,309
Fair Value | Money-market and savings accounts |  |
Interest-bearing liabilities: |  |
Deposits | 10,671,377 | 10,503,731
Fair Value | Certificates of deposit |  |
Interest-bearing liabilities: |  |
Deposits | 9,826,166 | 10,593,666
Carrying Value |  |
Earning assets: |  |
Cash and cash equivalents | 4,092,465 | 4,700,366
Trading investments | 49,600 | 53,262
Available-for-sale investments | 1,650,656 | 1,933,226
Accrued interest receivable | 1,695,698 | 1,546,590
Derivative instruments | 2 | 0
Total earning assets | 28,648,753 | 29,135,602
Interest-bearing liabilities: |  |
Long-term borrowings | 6,410,978 | 6,440,345
Accrued interest payable | 109,207 | 108,488
Derivative instruments | 55 | 40
Total interest-bearing liabilities | 26,998,695 | 27,615,625
Carrying Value | Money-market and savings accounts |  |
Interest-bearing liabilities: |  |
Deposits | 10,685,051 | 10,526,324
Carrying Value | Certificates of deposit |  |
Interest-bearing liabilities: |  |
Deposits | 9,793,404 | 10,540,428
Private Education Loans |  |
Earning assets: |  |
Loans held for investment, net, difference | 3,397,798 | 3,208,223
Private Education Loans | Fair Value |  |
Earning assets: |  |
Loans held for investment, net | 24,558,130 | 24,110,381
Private Education Loans | Carrying Value |  |
Earning assets: |  |
Loans held for investment, net | $ 21,160,332 | $ 20,902,158

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