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Estimated Fair Values (Estimated Fair Values For Certain Financial Assets And Financial Liabilities) (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | --- | ---
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Cash and due from banks | $ 362,048 | $ 376,719 |
Overnight investments | 4,347,336 | 1,107,844 |
Investment securities available for sale | 7,014,243 | 7,059,674 |
Investment securities held to maturity | 2,816,982 | 30,996 |
Investment in marketable equity securities | 91,680 | 82,333 |
Loans held for sale | 124,800 | 67,900 |
Net loans and leases | 32,567,661 | 28,656,355 |
Income earned not collected | 145,694 | 123,154 |
Deposits | 43,431,609 | 34,431,236 |
Time Deposits | 2,889,013 | 3,837,609 |
Securities Sold under Agreements to Repurchase | 641,487 | 442,956 |
Subordinated Debt | 504,518 | 163,412 |
Other Borrowings | 88,470 | 148,318 |
FDIC shared-loss payable | 15,601 | 112,395 | $ 105,618
Carrying Value |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Cash and due from banks | 362,048 | 376,719 |
Overnight investments | 4,347,336 | 1,107,844 |
Investment securities available for sale | 7,014,243 | 7,059,674 |
Investment securities held to maturity | 2,816,982 | 30,996 |
Investment in marketable equity securities | 91,680 | 82,333 |
Loans held for sale | 124,837 | 67,869 |
Net loans and leases | 32,567,661 | 28,656,355 |
Income earned not collected | 145,694 | 123,154 |
Federal Home Loan Bank stock | 45,392 | 43,039 |
Mortgage servicing assets | 19,628 | 24,891 |
Deposits | 40,542,596 | 30,593,627 |
Time Deposits | 2,889,013 | 3,837,609 |
Securities Sold under Agreements to Repurchase | 641,487 | 442,956 |
Federal Home Loan Bank Advances | 655,175 | 572,185 |
Subordinated Debt | 504,518 | 163,412 |
Other Borrowings | 88,470 | 148,318 |
FDIC shared-loss payable | 15,601 | 112,395 |
Accrued interest payable | 9,414 | 18,124 |
Fair Value |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Cash and due from banks | 362,048 | 376,719 |
Overnight investments | 4,347,336 | 1,107,844 |
Investment securities available for sale | 7,014,243 | 7,059,674 |
Investment securities held to maturity | 2,838,499 | 30,996 |
Investment in marketable equity securities | 91,680 | 82,333 |
Loans held for sale | 124,837 | 67,869 |
Net loans and leases | 33,298,166 | 28,878,550 |
Income earned not collected | 145,694 | 123,154 |
Federal Home Loan Bank stock | 45,392 | 43,039 |
Mortgage servicing assets | 20,283 | 26,927 |
Deposits | 40,542,596 | 30,593,627 |
Time Deposits | 2,905,577 | 3,842,162 |
Securities Sold under Agreements to Repurchase | 641,487 | 442,956 |
Federal Home Loan Bank Advances | 677,579 | 577,362 |
Subordinated Debt | 525,610 | 173,685 |
Other Borrowings | 89,263 | 149,232 |
FDIC shared-loss payable | 15,843 | 114,252 |
Accrued interest payable | $ 9,414 | $ 18,124 |

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