Summary of Nonvested Restricted Shares Activity (Detail) - Restricted Stock Units (RSUs)	12 Months Ended
	Dec. 31, 2022 $ / shares shares
GRANT DATE FAIR VALUE
Nonvested awards outstanding, beginning balance | $ / shares	$ 53.44	[1]
Granted | $ / shares	62.27	[1]
Vested | $ / shares	52.97	[1]
Nonvested awards outstanding, ending balance | $ / shares	$ 59.69	[1]
NONVESTED NUMBER OF SHARES
Nonvested awards outstanding, beginning balance | shares	231,800
Granted | shares	162,800
Vested | shares	(153,100)
Nonvested awards outstanding, ending balance | shares	241,500

[1] Weighted Average