Stock Plans - Schedule of Exercise Price Ranges, Characteristics of Outstanding Stock Options (Detail)	12 Months Ended
	Dec. 31, 2022 $ / shares shares
$33.01 – $45.00
Range of Exercise Prices
Range of Exercise Prices, minimum (in dollars per share)	$ 33.01
Range of Exercise Prices, maximum (in dollars per share)	$ 45.00
Stock Options Outstanding (in shares) | shares	33,148
Stock Options Outstanding
Stock Options Outstanding (in shares) | shares	33,148
Stock Options Outstanding, Weighted-Average Exercise Price (in dollars per share)	$ 44.50
Stock Options Outstanding, Weighted-Average Remaining Life (in years)	2 years 4 months 28 days
Stock Options Exercisable
Stock Options Exercisable (in shares) | shares	33,148
Stock Options Exercisable, Weighted-Average Exercise Price (in dollars per share)	$ 44.50
Stock Options Exercisable, Weighted-Average Remaining Life (in years)	2 years 4 months 28 days
$45.01 – $57.93
Range of Exercise Prices
Range of Exercise Prices, minimum (in dollars per share)	$ 45.01
Range of Exercise Prices, maximum (in dollars per share)	$ 57.93
Stock Options Outstanding (in shares) | shares	25,008
Stock Options Outstanding
Stock Options Outstanding (in shares) | shares	25,008
Stock Options Outstanding, Weighted-Average Exercise Price (in dollars per share)	$ 49.10
Stock Options Outstanding, Weighted-Average Remaining Life (in years)	2 years 2 months 15 days
Stock Options Exercisable
Stock Options Exercisable (in shares) | shares	25,008
Stock Options Exercisable, Weighted-Average Exercise Price (in dollars per share)	$ 49.10
Stock Options Exercisable, Weighted-Average Remaining Life (in years)	2 years 2 months 15 days
$33.01 – $57.93
Range of Exercise Prices
Range of Exercise Prices, minimum (in dollars per share)	$ 33.01
Range of Exercise Prices, maximum (in dollars per share)	$ 57.93
Stock Options Outstanding (in shares) | shares	58,156
Stock Options Outstanding
Stock Options Outstanding (in shares) | shares	58,156
Stock Options Outstanding, Weighted-Average Exercise Price (in dollars per share)	$ 46.48
Stock Options Outstanding, Weighted-Average Remaining Life (in years)	2 years 3 months 25 days
Stock Options Exercisable
Stock Options Exercisable (in shares) | shares	58,156
Stock Options Exercisable, Weighted-Average Exercise Price (in dollars per share)	$ 46.48
Stock Options Exercisable, Weighted-Average Remaining Life (in years)	2 years 3 months 25 days