Stock-Based Compensation - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		1 Months Ended		3 Months Ended
	Jun. 30, 2013	Jul. 01, 2012	May 09, 2013 2003 Equity Incentive Plan [Member]	May 15, 2013 Employee Stock Purchase Plan [Member]	Jun. 30, 2013 Stock Options [Member]	Jun. 30, 2013 Service-based RSUs [Member]	Jun. 30, 2013 Performance-based RSUs [Member]	May 09, 2013 Restricted stock and/or restricted stock units ("RSUs") [Member] 2003 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for new issuances			20	30				15
The date within which incentive stock options can be granted			Feb. 05, 2023
Value limit of awards granted in any fiscal year to non-employee director			$ 0.5
The date till which the term of the ESPP extended				May 14, 2023
Total unrecognized compensation expense, net of estimated forfeitures					36.8
Period to recognize total unrecognized compensation expense, net of estimated forfeitures on a weighted-average basis					2 years 6 months	2 years 9 months 18 days
Total unrecognized compensation expense, net of estimated forfeitures						115.7
Total unrecognized compensation expense related to performance based awards, net of estimated forfeitures							$ 15.1
Period to recognize total unrecognized compensation expense, net of estimated forfeitures on a weighted-average basis							1 year 9 months 18 days
Shares issued under ESPP	3.2	2.8