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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, 2021 | Dec. 31, 2020 | Jan. 01, 2020
--- | --- | --- | ---
Financial assets |  |  |
Total investment securities available for sale | $ 10,918,329 | $ 7,962,438 |
Loans held for sale | 750,642 | 760,123 |
Mutual funds and mutual funds held in rabbi trusts | 43,657 | 37,650 |
Loans, net of deferred fees and costs |  |  | $ 36,881,048
Derivative assets | 191,708 | 401,295 |
Financial Liabilities |  |  |
Non-interest-bearing deposits | 16,392,653 | 13,477,854 |
Time deposits | 4,117,475 |  |
Total deposits | 49,427,276 | 46,691,571 |
Securities sold under repurchase agreements | 264,133 | 227,922 |
Long-term debt | 1,204,229 | 1,202,494 |
Fair Value, Measurements, Recurring |  |  |
Financial assets |  |  |
Trading securities | 8,391 | 10,880 |
Total investment securities available for sale | 10,918,329 | 7,962,438 |
Other investments | 12,185 | 1,021 |
Mutual funds and mutual funds held in rabbi trusts | 43,657 | 37,650 |
GGL/SBA loans servicing asset | 3,233 | 3,258 |
Derivative assets | 191,708 | 401,295 |
Financial Liabilities |  |  |
Trading liability for short positions | 200 | 7,717 |
Earnout liability | 0 | 5,677 |
Mutual fund held in rabbi trusts | 27,205 | 20,752 |
Derivative liabilities | 98,602 | 157,167 |
Level 1 | Fair Value, Measurements, Recurring |  |  |
Financial assets |  |  |
Total cash, cash equivalents, and restricted cash | 3,009,853 | 4,252,917 |
Trading securities | 0 | 0 |
Total investment securities available for sale | 117,838 | 20,257 |
Loans held for sale | 0 | 0 |
Other investments | 0 | 0 |
Mutual funds and mutual funds held in rabbi trusts | 43,657 | 37,650 |
Loans, net of deferred fees and costs | 0 | 0 |
GGL/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 |
Securities sold under repurchase agreements | 264,133 | 227,922 |
Trading liability for short positions | 0 | 0 |
Long-term debt | 0 | 0 |
Earnout liability | 0 | 0 |
Mutual fund held in rabbi trusts | 27,205 | 20,752 |
Derivative liabilities | 0 | 0 |
Level 2 | Fair Value, Measurements, Recurring |  |  |
Financial assets |  |  |
Total cash, cash equivalents, and restricted cash | 0 | 0 |
Trading securities | 8,391 | 10,880 |
Total investment securities available for sale | 10,800,491 | 7,940,160 |
Loans held for sale | 108,198 | 216,647 |
Other investments | 0 | 0 |
Mutual funds and mutual funds held in rabbi trusts | 0 | 0 |
Loans, net of deferred fees and costs | 0 | 0 |
GGL/SBA loans servicing asset | 0 | 0 |
FRB and FHLB stock | 159,941 | 157,520 |
Derivative assets | 191,708 | 401,295 |
Financial Liabilities |  |  |
Non-interest-bearing deposits | 16,392,653 | 13,477,854 |
Non-time interest-bearing deposits | 28,917,148 | 27,265,521 |
Time deposits | 4,125,673 | 5,970,146 |
Total deposits | 49,435,474 | 46,713,521 |
Securities sold under repurchase agreements | 0 | 0 |
Trading liability for short positions | 200 | 7,717 |
Long-term debt | 1,243,147 | 1,266,825 |
Earnout liability | 0 | 0 |
Mutual fund held in rabbi trusts | 0 | 0 |
Derivative liabilities | 95,067 | 155,119 |
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 | 2,021 |
Loans held for sale | 641,782 | 544,292 |
Other investments | 12,185 | 1,021 |
Mutual funds and mutual funds held in rabbi trusts | 0 | 0 |
Loans, net of deferred fees and costs | 39,118,275 | 37,605,881 |
GGL/SBA loans servicing asset | 3,233 | 3,258 |
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 |
Securities sold under repurchase agreements | 0 | 0 |
Trading liability for short positions | 0 | 0 |
Long-term debt | 0 | 0 |
Earnout liability | 0 | 5,677 |
Mutual fund held in rabbi trusts | 0 | 0 |
Derivative liabilities | 3,535 | 2,048 |
Carrying Value | Fair Value, Measurements, Recurring |  |  |
Financial assets |  |  |
Total cash, cash equivalents, and restricted cash | 3,009,853 | 4,252,917 |
Trading securities | 8,391 | 10,880 |
Total investment securities available for sale | 10,918,329 | 7,962,438 |
Loans held for sale | 750,642 | 760,123 |
Other investments | 12,185 | 1,021 |
Mutual funds and mutual funds held in rabbi trusts | 43,657 | 37,650 |
Loans, net of deferred fees and costs | 38,884,361 | 37,647,248 |
GGL/SBA loans servicing asset | 3,233 | 3,258 |
FRB and FHLB stock | 159,941 | 157,520 |
Derivative assets | 191,708 | 401,295 |
Financial Liabilities |  |  |
Non-interest-bearing deposits | 16,392,653 | 13,477,854 |
Non-time interest-bearing deposits | 28,917,148 | 27,265,521 |
Time deposits | 4,117,475 | 5,948,196 |
Total deposits | 49,427,276 | 46,691,571 |
Securities sold under repurchase agreements | 264,133 | 227,922 |
Trading liability for short positions | 200 | 7,717 |
Long-term debt | 1,204,229 | 1,202,494 |
Earnout liability |  | 5,677 |
Mutual fund held in rabbi trusts | 27,205 | 20,752 |
Derivative liabilities | 98,602 | 157,167 |
Fair Value | Fair Value, Measurements, Recurring |  |  |
Financial assets |  |  |
Total cash, cash equivalents, and restricted cash | 3,009,853 | 4,252,917 |
Trading securities | 8,391 | 10,880 |
Total investment securities available for sale | 10,918,329 | 7,962,438 |
Loans held for sale | 749,980 | 760,939 |
Other investments | 12,185 | 1,021 |
Mutual funds and mutual funds held in rabbi trusts | 43,657 | 37,650 |
Loans, net of deferred fees and costs | 39,118,275 | 37,605,881 |
GGL/SBA loans servicing asset | 3,233 | 3,258 |
FRB and FHLB stock | 159,941 | 157,520 |
Derivative assets | 191,708 | 401,295 |
Financial Liabilities |  |  |
Non-interest-bearing deposits | 16,392,653 | 13,477,854 |
Non-time interest-bearing deposits | 28,917,148 | 27,265,521 |
Time deposits | 4,125,673 | 5,970,146 |
Total deposits | 49,435,474 | 46,713,521 |
Securities sold under repurchase agreements | 264,133 | 227,922 |
Trading liability for short positions | 200 | 7,717 |
Long-term debt | 1,243,147 | 1,266,825 |
Earnout liability |  | 5,677 |
Mutual fund held in rabbi trusts | 27,205 | 20,752 |
Derivative liabilities | $ 98,602 | $ 157,167 |

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