Capital Management - Additional Information (Detail) - USD ($)	12 Months Ended			166 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2023	Oct. 31, 2016
Equity [Abstract]
Share repurchase program, new limit amount					$ 25,000,000
Shares repurchased under the program	46,741	264,449	0
Shares repurchased under the program, value	$ 2,200,000	$ 12,400,000
Shares repurchased, value	$ 36,929,000	$ 34,758,000		$ 36,929,000
Shares repurchased, average price	$ 46.45	$ 46.84		$ 23.53
Shares repurchased	1,569,440	1,522,699		1,569,440
Quarterly dividend per share	$ 0.34	$ 0.31	$ 0.29	$ 0.34
Extraordinary dividends declared per share	$ 3.50	$ 4.00	$ 4.00