Treasury Stock and Subsequent Event - Additional Information (Detail) - USD ($)	1 Months Ended	3 Months Ended	9 Months Ended
	Jan. 29, 2016	Dec. 31, 2015	Dec. 31, 2015	Nov. 30, 2015	Oct. 31, 2015	Mar. 31, 2015
Class of Stock [Line Items]
Number of shares of common stock authorized to repurchase		35,000,000	35,000,000	1,000,000	34,000,000
Treasury stock, value		$ 387,056,000	$ 387,056,000			$ 360,278,000
Treasury stock, shares		33,775,022	33,775,022			32,992,488
Average price per share of common stock		$ 35.91	$ 34.22
Common stock, shares outstanding		19,607,827	19,607,827			20,250,669
Number of shares of common stock repurchased		222,832	782,534
Treasury Stock, Value, Acquired, Cost Method		$ 8,000,000	$ 26,800,000
Nineteen Ninety Six Share Repurchase Program [Member]
Class of Stock [Line Items]
Common stock equals to percentage of outstanding common stock			63.00%
Average price per share of common stock			$ 11.46
Subsequent Event [Member]
Class of Stock [Line Items]
Average price per share of common stock	$ 43.44
Number of shares of common stock repurchased	42,629
Treasury Stock, Value, Acquired, Cost Method	$ 1,852,000