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LOANS AND LEASES - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2023 USD ($) loans	Dec. 31, 2021 USD ($)	Dec. 31, 2022 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unused Commitments to Extend Credit	$ 3,982,599,000		$ 3,904,732,000
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | loans	18
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	$ 4,400,000	$ 29,000
Restructured Loans, Nonaccrual Status		$ 16,000,000	$ 10,000,000
Financial Difficulty Modification
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unused Commitments to Extend Credit	0
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Restructured Loans, Loan Relationships, Review Threshold Amount Minimum	$ 250,000

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Restructured Loans, Loan Relationships, Review Threshold Amount Minimum for commercial and other loans greater than $250,000

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Number of financing receivable contracts modified as troubled debt restructuring within previous 12 months, with subsequent payment default.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 34
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-34

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Amortized cost of financing receivable with payment default in current period and modified within previous 12 months preceding payment default for debtor experiencing financial difficulty.

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Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 12A
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481933/310-10-55-12A

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
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Unused amount of commitments to extend credit to customers.

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