Contractual Maturities of Investments Held (Detail) $ in Thousands	Apr. 03, 2016 USD ($)
Schedule of Available-for-sale Securities
Due within one year, cost	$ 409,971
Due after 1 year through 5 years, cost	184,645
Due after 5 years through 10 years, cost	4,432
Due after 10 years, cost	39,544
Total, cost	638,592
Due within one year, fair value	410,003
Due after 1 year through 5 years, fair value	184,852
Due after 5 years through 10 years, fair value	4,546
Due after 10 years, fair value	40,305
Total, fair value	$ 639,706