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Fair Value Accounting - Carrying And Estimated Fair Values Of Financial Instruments Carried On Balance Sheet (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Financial assets |  |
Total investment securities available for sale | $ 9,678,103 | $ 10,918,329
Mutual funds and mutual funds held in rabbi trusts | 42,659 | 43,657
Loans, net | 43,272,929 | 38,884,361
Derivative assets | 89,815 | 191,708
Financial liabilities |  |
Non-interest-bearing deposits | 15,639,899 | 16,392,653
Time deposits | 6,295,025 |
Total deposits | 48,871,559 | 49,427,276
Federal funds purchased and securities sold under repurchase agreements | 146,588 | 264,133
Short-term FHLB advances | 603,384 | 200
Long-term debt | 4,109,597 | 1,204,229
Fair Value, Measurements, Recurring |  |
Financial assets |  |
Trading securities | 8,295 | 8,391
Total investment securities available for sale | 9,678,103 | 10,918,329
Other investments | 11,172 | 12,185
Mutual funds and mutual funds held in rabbi trusts | 42,659 | 43,657
SBA loans servicing asset | 2,354 | 3,233
Derivative assets | 89,815 | 191,708
Financial liabilities |  |
Securities sold short | 3,370 | 200
Mutual fund held in rabbi trusts | 27,944 | 27,205
Derivative liabilities | 342,680 | 98,602
Level 1 | Fair Value, Measurements, Recurring |  |
Financial assets |  |
Total cash, cash equivalents, and restricted cash | 1,977,780 | 3,009,853
Trading securities | 0 | 0
Total investment securities available for sale | 471,813 | 117,838
Loans held for sale | 0 | 0
Other investments | 0 | 0
Mutual funds and mutual funds held in rabbi trusts | 42,659 | 43,657
Loans, net | 0 | 0
SBA loans servicing asset | 0 | 0
FRB and FHLB stock | 0 | 0
Derivative assets | 0 | 0
Financial liabilities |  |
Non-interest-bearing deposits | 0 | 0
Non-time interest-bearing deposits | 0 | 0
Time deposits | 0 | 0
Total deposits | 0 | 0
Federal funds purchased and securities sold under repurchase agreements | 146,588 | 264,133
Securities sold short | 3,370 | 0
Short-term FHLB advances | 0 |
Long-term debt | 0 | 0
Mutual fund held in rabbi trusts | 27,944 | 27,205
Derivative liabilities | 0 | 0
Level 2 | Fair Value, Measurements, Recurring |  |
Financial assets |  |
Total cash, cash equivalents, and restricted cash | 0 | 0
Trading securities | 8,295 | 8,391
Total investment securities available for sale | 9,206,290 | 10,800,491
Loans held for sale | 51,136 | 108,198
Other investments | 0 | 0
Mutual funds and mutual funds held in rabbi trusts | 0 | 0
Loans, net | 0 | 0
SBA loans servicing asset | 0 | 0
FRB and FHLB stock | 308,321 | 159,941
Derivative assets | 89,815 | 191,708
Financial liabilities |  |
Non-interest-bearing deposits | 15,639,899 | 16,392,653
Non-time interest-bearing deposits | 26,936,635 | 28,917,148
Time deposits | 6,260,315 | 4,125,673
Total deposits | 48,836,849 | 49,435,474
Federal funds purchased and securities sold under repurchase agreements | 0 | 0
Securities sold short | 0 | 200
Short-term FHLB advances | 600,014 |
Long-term debt | 4,120,113 | 1,243,147
Mutual fund held in rabbi trusts | 0 | 0
Derivative liabilities | 339,227 | 95,067
Level 3 | Fair Value, Measurements, Recurring |  |
Financial assets |  |
Total cash, cash equivalents, and restricted cash | 0 | 0
Trading securities | 0 | 0
Total investment securities available for sale | 0 | 0
Loans held for sale | 339,949 | 641,782
Other investments | 11,172 | 12,185
Mutual funds and mutual funds held in rabbi trusts | 0 | 0
Loans, net | 42,192,295 | 39,118,275
SBA loans servicing asset | 2,354 | 3,233
FRB and FHLB stock | 0 | 0
Derivative assets | 0 | 0
Financial liabilities |  |
Non-interest-bearing deposits | 0 | 0
Non-time interest-bearing deposits | 0 | 0
Time deposits | 0 | 0
Total deposits | 0 | 0
Federal funds purchased and securities sold under repurchase agreements | 0 | 0
Securities sold short | 0 | 0
Short-term FHLB advances | 0 |
Long-term debt | 0 | 0
Mutual fund held in rabbi trusts | 0 | 0
Derivative liabilities | 3,453 | 3,535
Carrying Value | Fair Value, Measurements, Recurring |  |
Financial assets |  |
Total cash, cash equivalents, and restricted cash | 1,977,780 | 3,009,853
Trading securities | 8,295 | 8,391
Total investment securities available for sale | 9,678,103 | 10,918,329
Loans held for sale | 391,502 | 750,642
Other investments | 11,172 | 12,185
Mutual funds and mutual funds held in rabbi trusts | 42,659 | 43,657
Loans, net | 43,272,929 | 38,884,361
SBA loans servicing asset | 2,354 | 3,233
FRB and FHLB stock | 308,321 | 159,941
Derivative assets | 89,815 | 191,708
Financial liabilities |  |
Non-interest-bearing deposits | 15,639,899 | 16,392,653
Non-time interest-bearing deposits | 26,936,635 | 28,917,148
Time deposits | 6,295,025 | 4,117,475
Total deposits | 48,871,559 | 49,427,276
Federal funds purchased and securities sold under repurchase agreements | 146,588 | 264,133
Securities sold short | 3,370 | 200
Short-term FHLB advances | 600,014 |
Long-term debt | 4,109,597 | 1,204,229
Mutual fund held in rabbi trusts | 27,944 | 27,205
Derivative liabilities | 342,680 | 98,602
Fair Value | Fair Value, Measurements, Recurring |  |
Financial assets |  |
Total cash, cash equivalents, and restricted cash | 1,977,780 | 3,009,853
Trading securities | 8,295 | 8,391
Total investment securities available for sale | 9,678,103 | 10,918,329
Loans held for sale | 391,085 | 749,980
Other investments | 11,172 | 12,185
Mutual funds and mutual funds held in rabbi trusts | 42,659 | 43,657
Loans, net | 42,192,295 | 39,118,275
SBA loans servicing asset | 2,354 | 3,233
FRB and FHLB stock | 308,321 | 159,941
Derivative assets | 89,815 | 191,708
Financial liabilities |  |
Non-interest-bearing deposits | 15,639,899 | 16,392,653
Non-time interest-bearing deposits | 26,936,635 | 28,917,148
Time deposits | 6,260,315 | 4,125,673
Total deposits | 48,836,849 | 49,435,474
Federal funds purchased and securities sold under repurchase agreements | 146,588 | 264,133
Securities sold short | 3,370 | 200
Short-term FHLB advances | 600,014 |
Long-term debt | 4,120,113 | 1,243,147
Mutual fund held in rabbi trusts | 27,944 | 27,205
Derivative liabilities | $ 342,680 | $ 98,602

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