Share-based Compensation Arrangement by Share-based Payment Award, Award Target Opportunity, Percentage

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- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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- Definition

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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- Definition

Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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- Definition

Description of service or performance condition required to be met for earning right to award under share-based payment arrangement. Includes, but is not limited to, combination of market, performance or service condition.

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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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.

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STOCK-BASED COMPENSATION - Performance Units - Additional Information (Detail) - Omnibus Plan [Member] - Performance Shares [member] - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted performance units			165,487	216,876
Performance units program description			Performance units granted during the nine-month periods ended September 30, 2024 and 2023 vest on the third anniversary of the effective date of the award based on actual achievement of two performance metrics weighted equally: relative total shareholder return (“Relative TSR”), compared to companies that comprise the KBW Nasdaq Regional Banking Index, and the achievement of a tangible book value per share (“TBVPS”) goal, which is measured based upon the growth in the tangible book value during the performance cycle, adjusted for certain allowable non-recurring transactions. The participant may earn 50% of their target opportunity for threshold level performance and up to 150% of their target opportunity for maximum level performance, based on the individual achievement of each performance goal during a three-year performance cycle. Amounts between threshold, target and maximum performance will vest in a proportional amount.
Stock-based compensation expense	$ 0.7	$ 0.6	$ 1.8	$ 1.6
Unrecognized compensation cost related to unvested performance units	$ 4.2		$ 4.2
Period for cost recognition not yet recognized			2 years
Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Target opportunity, percentage			50.00%
Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Target opportunity, percentage			150.00%
Executives [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Performance units program description	These awards, which are granted to executives, do not contain non-forfeitable rights to dividend equivalent amounts and can only be settled in shares of the Corporation’s common stock.