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Estimated Fair Values (Estimated Fair Values For Certain Financial Assets And Financial Liabilities) (Details) - USD ($) $ in Thousands | Jun. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Cash and due from banks | $ 389,233 | $ 376,719
Overnight investments | 3,107,575 | 1,107,844
Debt Securities, Available-for-sale | 8,619,282 | 7,059,674
Investment securities held to maturity at cost | 774,878 | 30,996
Investment in marketable equity securities | 114,316 | 82,333
Loans held for sale | 107,900 | 67,900
Loans and Leases Receivable, Net Amount | 32,195,975 | 28,656,355
Income earned not collected | 175,496 | 123,154
Stock issued by Federal Home Loan Bank | 45,400 | 43,000
Deposits | 41,479,245 | 34,431,236
Securities sold under customer repurchase agreements | 740,276 | 442,956
FDIC shared-loss payable | 15,025 | 112,395
Subordinated Debt | 504,246 | 163,412
Other Borrowings | 96,791 | 148,318
Carrying Value |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Federal Home Loan Bank Advances | 657,682 | 572,185
Cash and due from banks | 389,233 | 376,719
Overnight investments | 3,107,575 | 1,107,844
Debt Securities, Available-for-sale | 8,619,282 | 7,059,674
Investment securities held to maturity at cost | 774,878 | 30,996
Investment in marketable equity securities | 114,316 | 82,333
Loans held for sale | 107,881 | 67,869
Loans and Leases Receivable, Net Amount | 32,195,975 | 28,656,355
Income earned not collected | 175,496 | 123,154
Stock issued by Federal Home Loan Bank | 45,392 | 43,039
Mortgage servicing rights | 20,167 | 24,891
Deposits | 38,202,609 | 30,593,627
Time deposits | 3,276,636 | 3,837,609
Securities sold under customer repurchase agreements | 740,276 | 442,956
FDIC shared-loss payable | 15,025 | 112,395
Accrued interest payable | 14,085 | 18,124
Subordinated Debt | 504,246 | 163,412
Other Borrowings | 96,791 | 148,318
Fair Value |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Federal Home Loan Bank Advances | 679,993 | 577,362
Cash and due from banks | 389,233 | 376,719
Overnight investments | 3,107,575 | 1,107,844
Debt Securities, Available-for-sale | 8,619,282 | 7,059,674
Investment securities held to maturity at cost | 791,325 | 30,996
Investment in marketable equity securities | 114,316 | 82,333
Loans held for sale | 107,881 | 67,869
Loans and Leases Receivable, Net Amount | 32,604,388 | 28,878,550
Income earned not collected | 175,496 | 123,154
Stock issued by Federal Home Loan Bank | 45,392 | 43,039
Mortgage servicing rights | 21,163 | 26,927
Deposits | 38,202,609 | 30,593,627
Time deposits | 3,303,841 | 3,842,162
Securities sold under customer repurchase agreements | 740,276 | 442,956
FDIC shared-loss payable | 15,730 | 114,252
Accrued interest payable | 14,085 | 18,124
Subordinated Debt | 506,089 | 173,685
Other Borrowings | $ 95,861 | $ 149,232

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