Benefit Plans - Summary of Company's Option Activity (Detail) - $ / shares	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Share-Based Payment Arrangement [Abstract]
Number of Options, Beginning Balance	240	139,350	274,630
Number of Options, granted	0	0	0
Number of Options, exercised	(240)	(139,110)	(135,280)
Number of Options, cancelled/forfeited/expired	0	0
Number of Options, Ending Balance		240	139,350
Number of Options, Exercisable at December 31, 2024	0
Weighted-Average Price, Beginning Balance	$ 34.57	$ 33.59	$ 29.66
Weighted-Average Price, Options exercised	34.57	33.51	25.61
Weighted-Average Price, Options cancelled/forfeited/expired	0	0	0
Weighted-Average Price, Ending Balance		$ 34.57	$ 33.59
Weighted-Average Price, Exercisable at December 31, 2023	$ 0

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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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For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
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-Paragraph 2
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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Weighted average price of options that were either forfeited or expired.

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Gross number of share options (or share units) granted during the period.

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

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
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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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Number of share options (or share units) exercised during the current period.

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