Stock-Based Compensation Plans - Restricted Stock and Performance Share Activity (Detail) - Restricted Stock [Member] - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Restricted Shares, Beginning balance	162,610	230,647	346,032
Number of Restricted Shares, Granted	72,861	47,142	38,907
Number of Restricted Shares, Performance share pay-out	0	0	19,401
Number of Restricted Shares, Canceled	(8,513)	(3,911)	(3,480)
Number of Restricted Shares, Vested	(64,602)	(111,268)	(170,213)
Number of Restricted Shares, Ending balance	162,356	162,610	230,647
Weighted Average Grant Date Fair Value, Beginning balance	$ 316.56	$ 224.63	$ 154.27
Weighted Average Grant Date Fair Value, Ending balance	$ 321.04	$ 316.56	$ 224.63