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Estimated Fair Values (Estimated Fair Values For Certain Financial Assets And Financial Liabilities) (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Cash and due from banks | $ 337,814 | $ 362,048 |
Overnight investments | 9,114,660 | 4,347,336 |
Investment securities available for sale | 9,203,427 | 7,014,243 |
Investment securities held to maturity | 3,809,453 | 2,816,982 |
Investment in marketable equity securities | 97,528 | 91,680 |
Loans held for sale | 98,700 | 124,800 |
Net loans and leases | 32,193,029 | 32,567,661 |
Income earned not collected | 134,237 | 145,694 |
Deposits | 51,406,094 | 43,431,609 |
Time Deposits | 2,480,967 | 2,889,013 |
Securities Sold under Agreements to Repurchase | 589,101 | 641,487 |
Subordinated Debt | 477,564 | 504,518 |
Other Borrowings | 72,155 | 88,470 |
FDIC shared-loss payable | 0 | 15,601 | $ 112,395
Carrying Value |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Cash and due from banks | 337,814 | 362,048 |
Overnight investments | 9,114,660 | 4,347,336 |
Investment securities available for sale | 9,203,427 | 7,014,243 |
Investment securities held to maturity | 3,809,453 | 2,816,982 |
Investment in marketable equity securities | 97,528 | 91,680 |
Loans held for sale | 98,741 | 124,837 |
Net loans and leases | 32,193,029 | 32,567,661 |
Income earned not collected | 134,237 | 145,694 |
Federal Home Loan Bank stock | 40,450 | 45,392 |
Mortgage servicing assets | 23,797 | 19,628 |
Deposits | 48,925,127 | 40,542,596 |
Time Deposits | 2,480,967 | 2,889,013 |
Securities Sold under Agreements to Repurchase | 589,101 | 641,487 |
Federal Home Loan Bank Advances | 644,659 | 655,175 |
Subordinated Debt | 477,564 | 504,518 |
Other Borrowings | 72,155 | 88,470 |
FDIC shared-loss payable | 0 | 15,601 |
Accrued interest payable | 7,922 | 9,414 |
Fair Value |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Cash and due from banks | 337,814 | 362,048 |
Overnight investments | 9,114,660 | 4,347,336 |
Investment securities available for sale | 9,203,427 | 7,014,243 |
Investment securities held to maturity | 3,759,650 | 2,838,499 |
Investment in marketable equity securities | 97,528 | 91,680 |
Loans held for sale | 98,741 | 124,837 |
Net loans and leases | 31,889,594 | 33,298,166 |
Income earned not collected | 134,237 | 145,694 |
Federal Home Loan Bank stock | 40,450 | 45,392 |
Mortgage servicing assets | 23,784 | 20,283 |
Deposits | 48,925,127 | 40,542,596 |
Time Deposits | 2,471,116 | 2,905,577 |
Securities Sold under Agreements to Repurchase | 589,101 | 641,487 |
Federal Home Loan Bank Advances | 654,694 | 677,579 |
Subordinated Debt | 495,483 | 525,610 |
Other Borrowings | 72,476 | 89,263 |
FDIC shared-loss payable | 0 | 15,843 |
Accrued interest payable | $ 7,922 | $ 9,414 |

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