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Derivative Financial Instruments (Narrative) (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Derivative [Line Items] |  |  |
Weighted-average strike rate for outstanding interest rate caps | 3.26% |  |
Approximate credit exposure related to swaps with bank customers | $ 43,600 |  |
Cash collateral on deposit with other financial institutions | 3,200 | $ 110,300 |
Securities Loaned, Fair Value of Collateral | 8,500 |  |
Interest Rate Swaps With Upstream Financial Institution Counterparties [Member] |  |  |
Derivative [Line Items] |  |  |
Approximate credit exposure related to swaps with bank customers | 2,900 |  |
Not Designated as Hedging Instrument [Member] | Financial Institution Counterparties Loan Lease Interest Rate Swaps Liabilities [Member] |  |  |
Derivative [Line Items] |  |  |
Estimated fair value of derivative contracts cleared through Chicago Mercantile Exchange | 0 | 0 |
Not Designated as Hedging Instrument [Member] | Put Option [Member] | Other Non-Interest Income [Member] |  |  |
Derivative [Line Items] |  |  |
Gains included in other income from the sale of put options | $ 0 | $ 0 | $ 5,992

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