Acquisition - SPG (Details) - USD ($) $ in Thousands		3 Months Ended		12 Months Ended
	Jun. 25, 2018	Mar. 30, 2019	Mar. 31, 2018	Dec. 31, 2018
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired		$ 49,789	$ 21,047
Goodwill		584,537		$ 550,202
SPG
Business Acquisition [Line Items]
Business Acquisition, Date of Acquisition Agreement	Jun. 25, 2018
Payments to acquire business	$ 352,700
Payments to Acquire Businesses, Net of Cash Acquired	341,490
Business Acquisition Transaction Costs				4,800
Trade accounts and notes receivable, net		19,173		19,173
Inventory	42,758	42,758		42,758
Other current assets		1,360		1,322
Property, Plant, and Equipment	6,653	6,653		6,653
Identifiable Intangible Assets		150,430		150,430
Deferred tax assets		734		831
Other noncurrent assets		12		12
Current liabilities		(26,473)		(26,473)
Deferred tax liabilities		(35,436)		(35,533)
Other noncurrent liabilities		(1,412)		(1,412)
Net Assets Acquired		157,799		157,761
Goodwill	183,691	183,691		183,729
Total Purchase Price		341,490		$ 341,490
Inventory fair value step-up	$ 8,900
Amortization of Inventory Step-up		$ 2,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		10 years
Developed Technology | SPG
Business Acquisition [Line Items]
Identifiable Intangible Assets		$ 20,070
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		8 years
Trademarks and Trade names | SPG
Business Acquisition [Line Items]
Identifiable Intangible Assets		$ 6,670
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		12 years
Customer Relationships | SPG
Business Acquisition [Line Items]
Identifiable Intangible Assets		$ 107,790
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		12 years
Other Intangible Assets | SPG
Business Acquisition [Line Items]
Identifiable Intangible Assets		$ 15,900
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		11 months