Treasury Stock - Additional Information (Detail) - USD ($)		3 Months Ended		6 Months Ended
	Oct. 01, 2020	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Mar. 31, 2020	Feb. 28, 2019
Class of Stock [Line Items]
Number of shares of common stock authorized to repurchase		37,000,000		37,000,000			1,000,000
Treasury stock, value		$ 546,204,000		$ 546,204,000		$ 531,764,000
Treasury stock, shares		36,470,554		36,470,554		36,285,591
Average price per share of common stock		$ 80.10		$ 78.07
Common stock, shares outstanding		17,908,338		17,908,338		17,968,966
Number of shares of common stock repurchased		150,325		184,963
Treasury stock, value, acquired, cost method		$ 12,042,000	$ 19,197,000	$ 14,440,000	$ 28,316,000
TreasuryStock, Shares Outstanding		36,470,554		36,470,554
Nineteen Ninety Six Share Repurchase Program [Member]
Class of Stock [Line Items]
Common stock equals to percentage of outstanding common stock				67.00%
Average price per share of common stock				$ 14.98
Subsequent Event [Member]
Class of Stock [Line Items]
Average price per share of common stock	$ 90.11
Number of shares of common stock repurchased	25,513
Treasury stock, value, acquired, cost method	$ 2.3