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Loans and Leases - Quality of Non-Covered Loans (Excluding PCI Loans and Leases) (Parenthetical) (Detail) - Taxi Medallion Loans - Commercial and Industrial - USD ($) | Mar. 31, 2020 | Dec. 31, 2019
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Financing Receivable, 30-89 Days Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | $ 0 | $ 0
Loans 90 Days Or More Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | $ 22,900,000 | $ 30,400,000

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