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Equity Plan Awards - Status Summary of Non-Vested Shares (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Grant-Date Fair Value, Granted	$ 21.51	$ 23.63
Performance Based Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares, Beginning balance	318,699	379,061	391,771
Number of Shares, Granted	94,028	83,190	102,043
Change based on performance achievement	(58,827)	(68,484)	71,180
Number of Shares, Vested	(86,188)	(51,308)	(175,087)
Number of Shares, Forfeited	(4,387)	(23,760)	(10,846)
Number of Shares, Ending Balance	263,325	318,699	379,061
Weighted Average Grant-Date Fair Value, Beginning balance	$ 18.05	$ 16.43	$ 16.26
Weighted Average Grant-Date Fair Value, Granted	21.51	23.63	20.03
Weighted Average Grant-Date Fair Value, Additional granted based on performance	14.73	16.87	20.53
Weighted Average Grant-Date Fair Value, Vested	13.99	17.09	19.78
Weighted Average Grant-Date Fair Value, Forfeited	17.67	17.21	16.89
Weighted Average Grant-Date Fair Value, Ending balance	$ 21.37	$ 18.05	$ 16.43

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Share based compensation arrangement by share based payment award equity instruments other than options additional grants based on performance.

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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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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The weighted average fair value at grant date for nonvested equity-based awards issued 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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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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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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