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Stock-Based Compensation - Summary of Activity in Corporation's Active Stock Plans (Detail) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options exercised, Number of Shares	(38,452)	(13,626)	(122,628)	(64,013)
Deferred Stock Units Outstanding
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning Balance, Number of Shares/Units			54,164
Granted, Number of Units			7,997
Stock Awards exercised/vested, Number of Shares			(9,382)
Ending Balance, Number of Shares/Units	52,779		52,779
Beginning Balance, Weighted-Average Grant-Date Fair Value			$ 89.71
Granted Weighted-Average Grant-Date Fair Value			116.84
Stock Award Exercised/Vested, Weighted Average Grant Date Fair Value			80.99
Ending Balance, Weighted-Average Grant-Date Fair Value	$ 95.37		$ 95.37
Non-Vested Restricted Stock Units Outstanding
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning Balance, Number of Shares/Units			566,806
Granted, Number of Units			2,826
Stock Awards exercised/vested, Number of Shares			(458)
Forfeited/expired, Number of Shares/Units			(1,408)
Ending Balance, Number of Shares/Units	567,766		567,766
Beginning Balance, Weighted-Average Grant-Date Fair Value			$ 99.77
Granted Weighted-Average Grant-Date Fair Value			107.95
Stock Award Exercised/Vested, Weighted Average Grant Date Fair Value			65.43
Forfeited/Expired, Weighted-Average Price			106.18
Ending Balance, Weighted-Average Grant-Date Fair Value	$ 99.82		$ 99.82
Stock Options Outstanding
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning Balance, Number of Shares			485,941
Stock options exercised, Number of Shares			(66,970)
Ending Balance, Number of Shares	418,971		418,971
Beginning Balance, Weighted-Average Exercise Price			$ 71.25
Stock options exercised, Weighted-Average Exercise Price			77.79
Ending Balance, Weighted-Average Exercise Price	$ 70.20		$ 70.20
Maximum [Member] \| Performance Stock Units Outstanding
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning Balance, Number of Shares/Units			267,054
Stock Awards exercised/vested, Number of Shares			(45,818)
Forfeited/expired, Number of Shares/Units			(22,913)
Ending Balance, Number of Shares/Units	198,323		198,323
Beginning Balance, Weighted-Average Grant-Date Fair Value			$ 89.99
Stock Award Exercised/Vested, Weighted Average Grant Date Fair Value			57.89
Forfeited/Expired, Weighted-Average Price			57.89
Ending Balance, Weighted-Average Grant-Date Fair Value	$ 101.12		$ 101.12