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Fair Value Measurement and Fair Value of Financial Instruments - Carrying and Fair Value Estimates per the Fair Value Hierarchy of Financial Instruments Measured on a Nonrecurring Basis (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Financial assets: |  |
Cash and cash equivalents | $ 4,210,801 | $ 4,614,984
Interest-bearing deposits with banks | 24,593 | 10,498
Securities purchased under resale agreements (“resale agreements”) | 485,000 | 785,000
HTM debt securities | 2,948,642 | 2,956,040
Restricted equity securities, at cost | 164,402 | 79,811
Financial liabilities: |  |
Federal Home Loan Bank (“FHLB”) advances | 3,500,000 | 0
Carrying Amount |  |
Financial assets: |  |
Cash and cash equivalents | 4,210,801 | 4,614,984
Interest-bearing deposits with banks | 24,593 | 10,498
Securities purchased under resale agreements (“resale agreements”) | 485,000 | 785,000
HTM debt securities | 2,948,642 | 2,956,040
Restricted equity securities, at cost | 164,402 | 79,811
Loans held-for-sale | 13,280 | 116
Loans held-for-investment, net | 51,322,224 | 51,542,039
Mortgage servicing rights | 6,234 | 6,602
Accrued interest receivable | 336,428 | 331,490
Financial liabilities: |  |
Demand, checking, savings and money market deposits | 37,789,344 | 38,048,974
Time deposits | 20,771,280 | 18,043,464
Short-term borrowings | 19,173 |
Federal Home Loan Bank (“FHLB”) advances | 3,500,000 |
BTFP borrowings |  | 4,500,000
Long-term debt | 31,768 | 148,249
Accrued interest payable | 63,470 | 205,430
Estimated Fair Value |  |
Financial assets: |  |
Cash and cash equivalents | 4,210,801 | 4,614,984
Interest-bearing deposits with banks | 24,593 | 10,498
Securities purchased under resale agreements (“resale agreements”) | 391,403 | 699,056
HTM debt securities | 2,414,478 | 2,453,971
Restricted equity securities, at cost | 164,402 | 79,811
Loans held-for-sale | 13,280 | 116
Loans held-for-investment, net | 49,849,727 | 50,256,565
Mortgage servicing rights | 10,787 | 9,470
Accrued interest receivable | 336,428 | 331,490
Financial liabilities: |  |
Demand, checking, savings and money market deposits | 37,789,344 | 38,048,974
Time deposits | 20,715,628 | 18,004,951
Short-term borrowings | 19,173 |
Federal Home Loan Bank (“FHLB”) advances | 3,500,000 |
BTFP borrowings |  | 4,500,000
Long-term debt | 30,201 | 150,896
Accrued interest payable | 63,470 | 205,430
Estimated Fair Value | Level 1 |  |
Financial assets: |  |
Cash and cash equivalents | 4,210,801 | 4,614,984
Interest-bearing deposits with banks | 0 | 0
Securities purchased under resale agreements (“resale agreements”) | 0 | 0
HTM debt securities | 485,400 | 488,551
Restricted equity securities, at cost | 0 | 0
Loans held-for-sale | 0 | 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 |
Federal Home Loan Bank (“FHLB”) advances | 0 |
BTFP borrowings |  | 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 | 24,593 | 10,498
Securities purchased under resale agreements (“resale agreements”) | 391,403 | 699,056
HTM debt securities | 1,929,078 | 1,965,420
Restricted equity securities, at cost | 164,402 | 79,811
Loans held-for-sale | 13,280 | 116
Loans held-for-investment, net | 0 | 0
Mortgage servicing rights | 0 | 0
Accrued interest receivable | 336,428 | 331,490
Financial liabilities: |  |
Demand, checking, savings and money market deposits | 37,789,344 | 38,048,974
Time deposits | 20,715,628 | 18,004,951
Short-term borrowings | 19,173 |
Federal Home Loan Bank (“FHLB”) advances | 3,500,000 |
BTFP borrowings |  | 4,500,000
Long-term debt | 30,201 | 150,896
Accrued interest payable | 63,470 | 205,430
Estimated Fair Value | Level 3 |  |
Financial assets: |  |
Cash and cash equivalents | 0 | 0
Interest-bearing deposits with banks | 0 | 0
Securities purchased under resale agreements (“resale agreements”) | 0 | 0
HTM debt securities | 0 | 0
Restricted equity securities, at cost | 0 | 0
Loans held-for-sale | 0 | 0
Loans held-for-investment, net | 49,849,727 | 50,256,565
Mortgage servicing rights | 10,787 | 9,470
Accrued interest receivable | 0 | 0
Financial liabilities: |  |
Demand, checking, savings and money market deposits | 0 | 0
Time deposits | 0 | 0
Short-term borrowings | 0 |
Federal Home Loan Bank (“FHLB”) advances | 0 |
BTFP borrowings |  | 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//1943274/2147480876/942-470-45-1 + Details
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