Stock-Based Incentive Plan - Status of Options Granted Under Long-Term Incentive Plan (Detail) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended
Jun. 30, 2025
Shares Under Option
Shares under option, outstanding, beginning balance	127,782
Shares under option, exercised	(13,000)
Shares under option, outstanding, ending balance	114,782
Shares under options, exercisable at June 30, 2025	114,782
Weighted Average Exercise Price Per Share [Abstract]
Weighted average exercise price per share, outstanding, beginning balance	$ 27.72
Weighted average exercise price per share, outstanding, exercised	24.84
Weighted average exercise price per share, outstanding, ending balance	28.05
Weighted average exercise price per share, exercisable at June 30, 2025	$ 28.05
Weighted average remaining contractual life, outstanding at June 30, 2025	2 years 1 month 6 days
Weighted average remaining contractual life, exercisable at June 30, 2025	2 years 1 month 6 days
Aggregated intrinsic value, outstanding at June 30, 2025	$ 229
Aggregated intrinsic value, exercisable at June 30, 2025	$ 229

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Number of options outstanding, including both vested and non-vested options.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of share options (or share units) exercised during the current period.

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