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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 | Dec. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Financial assets: |  |
Cash and cash equivalents | $ 4,188,139 | $ 5,250,742
Interest-bearing deposits with banks | 16,189 | 48,198
Resale agreements | 425,000 | 425,000
HTM debt securities | 2,870,058 | 2,917,413
Restricted equity securities, at cost | 153,484 | 165,259
Loans held-for-investment, net | 56,068,399 | 53,024,585
Financial liabilities: |  |
Time deposits | 25,284,814 |
FHLB advances | 3,000,000 | 3,500,000
Carrying Amount |  |
Financial assets: |  |
Cash and cash equivalents | 4,188,139 | 5,250,742
Interest-bearing deposits with banks | 16,189 | 48,198
Resale agreements | 425,000 | 425,000
HTM debt securities | 2,870,058 | 2,917,413
Restricted equity securities, at cost | 153,484 | 165,259
Loans held-for-sale | 20,976 |
Loans held-for-investment, net | 56,068,399 | 53,024,585
Mortgage servicing rights | 4,119 | 5,234
Accrued interest receivable | 315,669 | 316,392
Financial liabilities: |  |
Demand, checking, savings and money market deposits | 41,797,887 | 39,959,251
Time deposits | 25,284,814 | 23,215,772
FHLB advances | 3,000,000 | 3,500,000
Long-term debt | 32,320 | 32,001
Accrued interest payable | 60,513 | 61,950
Estimated Fair Value |  |
Financial assets: |  |
Cash and cash equivalents | 4,188,139 | 5,250,742
Interest-bearing deposits with banks | 16,189 | 48,198
Resale agreements | 351,065 | 329,769
HTM debt securities | 2,479,746 | 2,387,754
Restricted equity securities, at cost | 153,484 | 165,259
Loans held-for-sale | 20,976 |
Loans held-for-investment, net | 54,665,865 | 51,328,254
Mortgage servicing rights | 7,114 | 8,822
Accrued interest receivable | 315,669 | 316,392
Financial liabilities: |  |
Demand, checking, savings and money market deposits | 41,797,887 | 39,959,251
Time deposits | 25,285,076 | 23,225,317
FHLB advances | 3,001,878 | 3,497,953
Long-term debt | 32,070 | 31,246
Accrued interest payable | 60,513 | 61,950
Estimated Fair Value | Level 1 |  |
Financial assets: |  |
Cash and cash equivalents | 4,188,139 | 5,250,742
Interest-bearing deposits with banks | 0 | 0
Resale agreements | 0 | 0
HTM debt securities | 524,887 | 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
FHLB advances | 0 | 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 | 16,189 | 48,198
Resale agreements | 351,065 | 329,769
HTM debt securities | 1,954,859 | 1,887,896
Restricted equity securities, at cost | 153,484 | 165,259
Loans held-for-sale | 20,976 |
Loans held-for-investment, net | 0 | 0
Mortgage servicing rights | 0 | 0
Accrued interest receivable | 315,669 | 316,392
Financial liabilities: |  |
Demand, checking, savings and money market deposits | 41,797,887 | 39,959,251
Time deposits | 25,285,076 | 23,225,317
FHLB advances | 3,001,878 | 3,497,953
Long-term debt | 32,070 | 31,246
Accrued interest payable | 60,513 | 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 | 54,665,865 | 51,328,254
Mortgage servicing rights | 7,114 | 8,822
Accrued interest receivable | 0 | 0
Financial liabilities: |  |
Demand, checking, savings and money market deposits | 0 | 0
Time deposits | 0 | 0
FHLB advances | 0 | 0
Long-term debt | 0 | 0
Accrued interest payable | $ 0 | $ 0

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- Definition Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 470 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478878/942-470-45-1 + Details
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