Capital Management - Additional Information (Detail) - USD ($)	12 Months Ended			75 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2022	Oct. 31, 2016
Equity [Abstract]
Share repurchase program, new limit amount					$ 25.0
Shares repurchased under the program	264,449	0	0
Shares repurchased under the program, value	$ 12,400,000
Shares repurchased	1,522,699	1,258,250		1,522,699
Shares repurchased, value	$ 34,758,000	$ 22,370,000		$ 34,758,000
Shares repurchased, average price	$ 46.84			$ 22.83
Quarterly dividend per share	0.31	$ 0.29	$ 0.27	$ 0.31
Extraordinary dividends declared per share	$ 4.00	$ 4.00	$ 3.50