Fair Value Measurements - Assets and Liabilities at Fair Value (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Apr. 01, 2018	Apr. 02, 2017
Cash equivalents and short-term investments:
U.S. government treasuries and agencies securities	$ 60,272	$ 61,556
Money market funds	48,847	140,425
Asset-backed securities	16,687	13,847
Corporate bonds	109,605	96,376
International government bonds	2,638	5,410
Corporate commercial paper	9,034	4,898
Bank deposits	45,080	12,305
Repurchase agreements	142	173
Total assets measured at fair value	292,305	334,990
Quoted Prices in Active Markets for Identical Assets (Level 1)
Cash equivalents and short-term investments:
U.S. government treasuries and agencies securities	60,272	61,556
Money market funds	48,847	140,425
Asset-backed securities	0	0
Corporate bonds	0	0
International government bonds	0	0
Corporate commercial paper	0	0
Bank deposits	0	0
Repurchase agreements	0	0
Total assets measured at fair value	109,119	201,981
Significant Other Observable Inputs (Level 2)
Cash equivalents and short-term investments:
U.S. government treasuries and agencies securities	0	0
Money market funds	0	0
Asset-backed securities	16,687	13,847
Corporate bonds	109,605	96,376
International government bonds	2,638	5,410
Corporate commercial paper	9,034	4,898
Bank deposits	45,080	12,305
Repurchase agreements	142	173
Total assets measured at fair value	$ 183,186	$ 133,009