Subsequent Events (Details) - USD ($) $ in Thousands		3 Months Ended				6 Months Ended
	Jul. 02, 2020	Jun. 28, 2020	Mar. 29, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 28, 2020	Jun. 30, 2019
Subsequent Event [Line Items]
Net income (loss)		$ (67,881)	$ (11,219)	$ 42,290	$ 25,178	$ (79,100)	$ 67,468
Subsequent Event | Grass Valley
Subsequent Event [Line Items]
Proceeds from Divestiture of Businesses	$ 120,000
Proceeds from Divestiture of Businesses, Net of Cash Divested	67,000
Paid-in-Kind Interest	88,000
Deferred Consideration - Seller's Note	175,000
Deferred Compensation - Earnout Payments	178,000
Equity Interest in Divested Business	$ 3,000
Equity Interest in Divested Business, Percentage	9.00%