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Stock Based Compensation - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024	Apr. 27, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of option vesting rate			20.00%
Duration of options granted, years			10 years
Stock options outstanding, exercise price range, lower			$ 16.95
Stock options outstanding, exercise price range, upper			$ 48.91
Total unrecognized compensation cost related to nonvested share-based compensation arrangements granted under the Plan	$ 3,861,000		$ 3,861,000
Weighted-average period of unrecognized compensation cost recognition, years			1 year 21 days
Total fair value of shares vested			$ 416,000	$ 521,000
Stock compensation expense	669,000	$ 485,000	1,338,000	969,000
Dividends Payable	27,206,000	25,708,000	27,206,000	25,708,000	$ 25,753,000
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance measurement amount in assets	50,000,000,000		50,000,000,000
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance measurement amount in assets	$ 10,000,000,000		$ 10,000,000,000
Two Thousand Twenty One Omnibus Stock and Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of stock for issuance under the plan	1,246,395		1,246,395			2,500,000
2021 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of option vesting rate			20.00%
Other Liabilities [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividends Payable	$ 155,000	122,000	$ 155,000	122,000	$ 141,000
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total fair value of shares vested			1,670,000	1,418,000
Restricted Stock [Member] \| Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense	204,000	175,000	$ 397,000	350,000
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares vesting period			2 years
Percentage of option vesting rate			20.00%
Performance share [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of option vesting rate			33.30%
Performance share [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Issued Upon Vesting Based On Core Return Percentage			200.00%
Performance share [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Issued Upon Vesting Based On Core Return Percentage			0.00%
Performance share [Member] \| Executives And Other Officers [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares vesting period			3 years
Criteria period			3 years
Average adjusted earnings per share growth percentage			50.00%
Return on average assets			100.00%
Performance share [Member] \| Executives And Other Officers [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Issued Upon Vesting Based On Core Return Percentage			200.00%
Performance share [Member] \| Executives And Other Officers [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Issued Upon Vesting Based On Core Return Percentage			0.00%
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of option vesting rate			33.30%
Total unrecognized compensation cost related to nonvested share-based compensation arrangements granted under the Plan	3,620,000	2,478,000	$ 3,620,000	$ 2,478,000
Weighted-average period of unrecognized compensation cost recognition, years			11 months 23 days	1 year 21 days
Restricted Stock Units [Member] \| Employee [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense	$ 658,000	$ 391,000	$ 1,723,000	$ 860,000