Treasury Stock - Additional Information (Detail) - USD ($)		3 Months Ended		6 Months Ended
	Oct. 01, 2019	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Mar. 31, 2019	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		$ 494,472,000		$ 494,472,000		$ 466,156,000
Treasury stock, shares		35,812,115		35,812,115		35,463,238
Average price per share of common stock		$ 85.52		$ 81.16
Common stock, shares outstanding		18,364,416		18,364,416		18,557,794
Number of shares of common stock repurchased		224,466		348,877
Treasury stock, value, acquired, cost method		$ 19,197,000	$ 7,816,000	$ 28,316,000	$ 11,302,000
Nineteen Ninety Six Share Repurchase Program [Member]
Class of Stock [Line Items]
Common stock equals to percentage of outstanding common stock				66.00%
Average price per share of common stock				$ 13.81
Subsequent Event [Member]
Class of Stock [Line Items]
Average price per share of common stock	$ 78.20
Number of shares of common stock repurchased	92,052
Treasury stock, value, acquired, cost method	$ 7,199,000