Goodwill and Intangible Assets, Net - Amortization (Details) - USD ($) $ in Thousands	Oct. 01, 2017	Apr. 02, 2017
Finite-Lived Intangible Assets [Line Items]
2018 (Remaining 6 months)	$ 20,740
2019	41,002
2020	40,541
2021	39,417
2022 and thereafter	55,455
In-process research and development	575,725	$ 456,868
Net Assets	207,355	$ 108,818
Total amortizable purchased intangible assets
Finite-Lived Intangible Assets [Line Items]
In-process research and development	565,525
Net Assets	197,155
In-process research and development
Finite-Lived Intangible Assets [Line Items]
In-process research and development	10,200
Net Assets	$ 10,200