Fair Value Measurements (Tables)

6 Months Ended

Sep. 30, 2017

Fair Value Disclosures [Abstract]

Assets and liabilities measured at fair value on a recurring basis

The following tables present information about the Company’s assets and liabilities measured at fair value on a recurring basis as of September 30, 2017 and April 1, 2017:

	September 30, 2017
(In thousands)	Quoted Prices in Active Markets for Identical Instruments (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total Fair Value
Assets
Cash equivalents:
Money market funds	$	323,034	$	—	$	—	$	323,034
Financial institution securities	—		255,864		—		255,864
Non-financial institution securities	—		192,800		—		192,800
U.S. government and agency securities	13,880		31,528		—		45,408
Foreign government and agency securities	—		184,868		—		184,868
Short-term investments:
Financial institution securities	—		324,853		—		324,853
Non-financial institution securities	—		226,546		—		226,546
U.S. government and agency securities	27,098		23,158		—		50,256
Foreign government and agency securities	—		79,920		—		79,920
Asset-backed securities	—		217,827		—		217,827
Mortgage-backed securities	—		1,154,680		—		1,154,680
Debt mutual fund	—		34,029		—		34,029
Bank loans	—		157,899		—		157,899
Commercial mortgage-backed securities	—		244,017		—		244,017
Long-term investments:
Asset-backed securities	—		1,430		—		1,430
Mortgage-backed securities	—		41,971		—		41,971
Debt mutual fund	—		56,461		—		56,461
Total assets measured at fair value	$	364,012	$	3,227,851	$	—	$	3,591,863
Liabilities
Derivative financial instruments, net	$	—	$	1,462	$	—	$	1,462
Total liabilities measured at fair value	$	—	$	1,462	$	—	$	1,462
Net assets measured at fair value	$	364,012	$	3,226,389	$	—	$	3,590,401

	April 1, 2017
(In thousands)	Quoted Prices in Active Markets for Identical Instruments (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total Fair Value
Assets
Cash equivalents:
Money market funds	$	298,307	$	—	$	—	$	298,307
Non-financial institution securities	—		205,322		—		205,322
Foreign government and agency securities	—		177,310		—		177,310
Financial institution securities	—		158,962		—		158,962
U.S government and agency securities	2,998		50,984		—		53,982
Short-term investments:
Financial institution securities	—		189,835		—		189,835
Non-financial institution securities	—		203,938		—		203,938
U.S. government and agency securities	31,732		44,820		—		76,552
Foreign government and agency securities	—		144,811		—		144,811
Mortgage-backed securities	—		1,115,403		—		1,115,403
Debt mutual fund	—		34,068		—		34,068
Bank loans	—		154,014		—		154,014
Asset-backed securities	—		218,170		—		218,170
Commercial mortgage-backed securities	—		217,971		—		217,971
Long-term investments:
Mortgage-backed securities	—		60,099		—		60,099
Debt mutual fund	—		54,608		—		54,608
Asset-backed securities	—		1,581		—		1,581
Derivative financial instruments, net	—		1,661		—		1,661
Total assets measured at fair value	$	333,037	$	3,033,557	$	—	$	3,366,594

Changes in Level 3 instruments measured at fair value on a recurring basis

The following table is a reconciliation of all assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3):

	Three Months Ended				Six Months Ended
(In thousands)	September 30, 2017		October 1, 2016		September 30, 2017		October 1, 2016
Balance as of beginning of period	$	—	$	10,068	$	—	$	9,977
Total unrealized gains (losses):
Included in other comprehensive income (loss)	—		92		—		183
Balance as of end of period	$	—	$	10,160	$	—	$	10,160