Treasury Stock - Additional Information (Detail) - USD ($)		3 Months Ended	9 Months Ended
	Jan. 01, 2019	Dec. 31, 2018	Dec. 31, 2018	Dec. 31, 2017	Mar. 31, 2018	Feb. 28, 2017
Class of Stock [Line Items]
Number of shares of common stock authorized to repurchase		36,000,000	36,000,000			1,000,000
Treasury stock, value		$ 453,580,000	$ 453,580,000		$ 430,989,000
Treasury stock, shares		35,267,631	35,267,631		34,881,079
Average price per share of common stock		$ 60.51	$ 58.44
Common stock, shares outstanding		18,700,031	18,700,031		18,912,907
Number of shares of common stock repurchased		186,574	386,552
Treasury stock, value, acquired, cost method		$ 11,289,000	$ 22,591,000	$ 11,187,000
Nineteen Ninety Six Share Repurchase Program [Member]
Class of Stock [Line Items]
Common stock equals to percentage of outstanding common stock			65.00%
Average price per share of common stock			$ 12.86
Subsequent Event [Member]
Class of Stock [Line Items]
Average price per share of common stock	$ 62.81
Number of shares of common stock repurchased	70,019
Treasury stock, value, acquired, cost method	$ 4,398,000