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Estimated Fair Values (Estimated Fair Values For Certain Financial Assets And Financial Liabilities) (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Cash and due from banks | $ 352,419 | $ 376,719
Overnight investments | 3,137,945 | 1,107,844
Debt Securities, Available-for-sale | 9,019,788 | 7,059,674
Investment securities held to maturity at cost | 747,732 | 30,996
Investment in marketable equity securities | 93,074 | 82,333
Loans held for sale | 120,300 | 67,900
Loans and Leases Receivable, Net Amount | 32,621,208 | 28,656,355
Income earned not collected | 151,737 | 123,154
Stock issued by Federal Home Loan Bank | 45,400 | 43,000
Deposits | 42,250,606 | 34,431,236
Securities sold under customer repurchase agreements | 693,889 | 442,956
FDIC shared-loss payable | 15,313 | 112,395
Subordinated Debt | 504,381 | 163,412
Other Borrowings | 92,456 | 148,318
Carrying Value |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Federal Home Loan Bank Advances | 655,179 | 572,185
Cash and due from banks | 352,419 | 376,719
Overnight investments | 3,137,945 | 1,107,844
Debt Securities, Available-for-sale | 9,019,788 | 7,059,674
Investment securities held to maturity at cost | 747,732 | 30,996
Investment in marketable equity securities | 93,074 | 82,333
Loans held for sale | 120,305 | 67,869
Loans and Leases Receivable, Net Amount | 32,621,208 | 28,656,355
Income earned not collected | 151,737 | 123,154
Stock issued by Federal Home Loan Bank | 45,392 | 43,039
Mortgage servicing rights | 19,484 | 24,891
Deposits | 39,110,297 | 30,593,627
Time deposits | 3,140,309 | 3,837,609
Securities sold under customer repurchase agreements | 693,889 | 442,956
FDIC shared-loss payable | 15,313 | 112,395
Accrued interest payable | 10,477 | 18,124
Subordinated Debt | 504,381 | 163,412
Other Borrowings | 92,456 | 148,318
Fair Value |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Federal Home Loan Bank Advances | 680,718 | 577,362
Cash and due from banks | 352,419 | 376,719
Overnight investments | 3,137,945 | 1,107,844
Debt Securities, Available-for-sale | 9,019,788 | 7,059,674
Investment securities held to maturity at cost | 761,252 | 30,996
Investment in marketable equity securities | 93,074 | 82,333
Loans held for sale | 120,305 | 67,869
Loans and Leases Receivable, Net Amount | 33,269,733 | 28,878,550
Income earned not collected | 151,737 | 123,154
Stock issued by Federal Home Loan Bank | 45,392 | 43,039
Mortgage servicing rights | 20,313 | 26,927
Deposits | 39,110,297 | 30,593,627
Time deposits | 3,162,058 | 3,842,162
Securities sold under customer repurchase agreements | 693,889 | 442,956
FDIC shared-loss payable | 15,789 | 114,252
Accrued interest payable | 10,477 | 18,124
Subordinated Debt | 509,518 | 173,685
Other Borrowings | $ 92,794 | $ 149,232

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