Segment Information - Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2017	Jan. 01, 2017	Dec. 31, 2017	Jan. 01, 2017
Segment Reporting Information [Line Items]
Income before income taxes	$ 32,792	$ 29,365	$ 67,173	$ 71,524
Amortization of intangible assets	(10,400)	(6,500)	(32,004)	(18,313)
Stock-based compensation expense	(13,580)	(9,906)	(38,348)	(29,602)
Interest expense and other, net	1,570	407	6,500	3,679
Unallocated expenses
Segment Reporting Information [Line Items]
Amortization of intangible assets	(9,287)	(5,557)	(29,091)	(16,578)
Inventory fair market value adjustment	(1,178)	(757)	(7,270)	(3,672)
Assets impairment and other	0	0	(917)	(870)
Stock-based compensation expense	(13,578)	(9,906)	(38,348)	(29,602)
Severance, retention and facility closure costs	(378)	216	(5,210)	(16,722)
Acquisition-related costs and other	0	0	(2,225)	(72)
Interest expense and other, net	(5,583)	(4,080)
Interest income and other, net			15,311	10,021
Communications | Operating Segments
Segment Reporting Information [Line Items]
Income before income taxes	25,049	28,054	70,326	77,226
Computing, Consumer and Industrial | Operating Segments
Segment Reporting Information [Line Items]
Income before income taxes	$ 37,747	$ 21,395	$ 95,219	$ 71,835