Share Repurchases - Additional Information (Detail) (USD $) Share data in Millions, except Per Share data, unless otherwise specified	1 Months Ended		3 Months Ended		33 Months Ended
	Nov. 30, 2012	Jul. 31, 2011	Mar. 31, 2013	Mar. 30, 2014 Share Repurchase Program [Member]	Mar. 30, 2014 Share Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Purchase of common stock	$ 200,000,000	$ 150,000,000
Payments under share repurchase program			$ 31,250,000		$ 218,800,000
Repurchase of shares				0	5.4
Repurchase of shares average price per share					$ 40.37