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Fair Value Measurement and Fair Value of Financial Instruments - Schedule Of The Carrying And Fair Value Estimates Per The Fair Value Hierarchy Of Financial Instruments Measured On a Nonrecurring Basis (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Financial assets: |  |
Cash and cash equivalents | $ 4,694,194 | $ 5,250,742
Interest-bearing deposits with banks | 68,200 | 48,198
Resale agreements | 425,000 | 425,000
HTM debt securities | 2,880,682 | 2,917,413
Restricted equity securities, at cost | 152,536 | 165,259
Loans held-for-investment, net | 54,976,252 | 53,024,585
Financial liabilities: |  |
FHLB advances | 3,000,000 | 3,500,000
Repurchase agreements | 53,489 | 0
Carrying Amount |  |
Financial assets: |  |
Cash and cash equivalents | 4,694,194 | 5,250,742
Interest-bearing deposits with banks | 68,200 | 48,198
Resale agreements | 425,000 | 425,000
HTM debt securities | 2,880,682 | 2,917,413
Restricted equity securities, at cost | 152,536 | 165,259
Loans held-for-sale | 19,596 |
Loans held-for-investment, net | 54,976,252 | 53,024,585
Mortgage servicing rights | 4,362 | 5,234
Accrued interest receivable | 315,633 | 316,392
Financial liabilities: |  |
Demand, checking, savings and money market deposits | 41,296,069 | 39,959,251
Time deposits | 25,291,487 | 23,215,772
Short-term borrowings | 9,851 |
FHLB advances | 3,000,000 | 3,500,000
Repurchase agreements | 53,489 |
Long-term debt | 32,239 | 32,001
Accrued interest payable | 56,703 | 61,950
Estimated Fair Value |  |
Financial assets: |  |
Cash and cash equivalents | 4,694,194 | 5,250,742
Interest-bearing deposits with banks | 68,200 | 48,198
Resale agreements | 351,212 | 329,769
HTM debt securities | 2,467,362 | 2,387,754
Restricted equity securities, at cost | 152,536 | 165,259
Loans held-for-sale | 19,596 |
Loans held-for-investment, net | 53,569,366 | 51,328,254
Mortgage servicing rights | 7,601 | 8,822
Accrued interest receivable | 315,633 | 316,392
Financial liabilities: |  |
Demand, checking, savings and money market deposits | 41,296,069 | 39,959,251
Time deposits | 25,287,515 | 23,225,317
Short-term borrowings | 9,851 |
FHLB advances | 3,002,069 | 3,497,953
Repurchase agreements | 53,489 |
Long-term debt | 31,629 | 31,246
Accrued interest payable | 56,703 | 61,950
Estimated Fair Value | Level 1 |  |
Financial assets: |  |
Cash and cash equivalents | 4,694,194 | 5,250,742
Interest-bearing deposits with banks | 0 | 0
Resale agreements | 0 | 0
HTM debt securities | 519,800 | 499,858
Restricted equity securities, at cost | 0 | 0
Loans held-for-sale | 0 |
Loans held-for-investment, net | 0 | 0
Mortgage servicing rights | 0 | 0
Accrued interest receivable | 0 | 0
Financial liabilities: |  |
Demand, checking, savings and money market deposits | 0 | 0
Time deposits | 0 | 0
Short-term borrowings | 0 |
FHLB advances | 0 | 0
Repurchase agreements | 0 |
Long-term debt | 0 | 0
Accrued interest payable | 0 | 0
Estimated Fair Value | Level 2 |  |
Financial assets: |  |
Cash and cash equivalents | 0 | 0
Interest-bearing deposits with banks | 68,200 | 48,198
Resale agreements | 351,212 | 329,769
HTM debt securities | 1,947,562 | 1,887,896
Restricted equity securities, at cost | 152,536 | 165,259
Loans held-for-sale | 19,596 |
Loans held-for-investment, net | 0 | 0
Mortgage servicing rights | 0 | 0
Accrued interest receivable | 315,633 | 316,392
Financial liabilities: |  |
Demand, checking, savings and money market deposits | 41,296,069 | 39,959,251
Time deposits | 25,287,515 | 23,225,317
Short-term borrowings | 9,851 |
FHLB advances | 3,002,069 | 3,497,953
Repurchase agreements | 53,489 |
Long-term debt | 31,629 | 31,246
Accrued interest payable | 56,703 | 61,950
Estimated Fair Value | Level 3 |  |
Financial assets: |  |
Cash and cash equivalents | 0 | 0
Interest-bearing deposits with banks | 0 | 0
Resale agreements | 0 | 0
HTM debt securities | 0 | 0
Restricted equity securities, at cost | 0 | 0
Loans held-for-sale | 0 |
Loans held-for-investment, net | 53,569,366 | 51,328,254
Mortgage servicing rights | 7,601 | 8,822
Accrued interest receivable | 0 | 0
Financial liabilities: |  |
Demand, checking, savings and money market deposits | 0 | 0
Time deposits | 0 | 0
Short-term borrowings | 0 |
FHLB advances | 0 | 0
Repurchase agreements | 0 |
Long-term debt | 0 | 0
Accrued interest payable | $ 0 | $ 0

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