Treasury Stock - Additional Information (Detail) - USD ($)	12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2021	Nov. 30, 2022
Number of shares of common stock authorized to repurchase	39,000,000			1,000,000
Number of shares of common stock repurchased	598,241	566,073	367,961
Treasury stock, value, acquired, cost method	$ 93,675,000	$ 90,085,000	$ 32,671,000
Average price per share of common stock	$ 156.58	$ 159.14	$ 88.79
Treasury Stock [Member]
Number of shares of common stock repurchased	598,241	566,073	367,961
Treasury stock, value, acquired, cost method	$ 93,675,000	$ 90,085,000	$ 32,671,000
Treasury Stock [Member] | Director [Member]
Number of shares of common stock repurchased	53,167
Treasury stock, value, acquired, cost method	$ 10,800,000
Average price per share of common stock	$ 203.05