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Summary of Significant Accounting Policies (Narrative) (Detail) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Jan. 01, 2020 | Dec. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Cash collateral on deposit | $ 3,200 | $ 110,300 |  |  |
Foreclosed assets | 964 | 3,400 |  |  |
Real Estate Owned, Valuation Allowance, Provision | $ 0 | $ 14 | $ 231 |  |
Amount of significant concentrations of any properties with write downs from any single geographic region | 0.00% | 0.00% | 0.00% |  |
Cumulative effect of accounting change |  |  |  |  | $ (29,252)
Minimum [Member] |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Range of change in fair value of derivative hedging instrument to be considered highly effective | 80.00% |  |  |  |
Maximum [Member] |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Range of change in fair value of derivative hedging instrument to be considered highly effective | 125.00% |  |  |  |
Retained Earnings [Member] |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Cumulative effect of accounting change |  |  |  | $ (29,300) | $ (29,252)

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