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Loans and ACL - Summary of Performance of Loans Modified (Parenthetical) (Detail) - Nonperforming Financial Instruments [Member] $ in Millions	Jun. 30, 2024 USD ($)
Loans and Leases Receivable Disclosure [Line Items]
Nonperforming specialty finance loan totaling Amount	$ 14.4
Commercial and Industrial [Member]
Loans and Leases Receivable Disclosure [Line Items]
Nonperforming specialty finance loan totaling Amount	$ 14.4

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Amount, before valuation allowance, of financing receivable classified as held-for-sale.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481990/310-10-45-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 948
-SubTopic 310
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477011/948-310-45-1

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