Sale of Business - Loss on Sale of Business (Details) - USD ($)		3 Months Ended		6 Months Ended
	Jun. 25, 2020	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Currency translation adjustment loss		$ 52,088,000	$ 0	$ 52,088,000	$ 0
Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sales price	$ 35,008,000
Net assets sold (including working capital)	(36,002,000)
Currency translation adjustment loss	(52,088,000)
Goodwill allocated	(3,000,000)
Legal fees	(833,000)
Total loss on sale of business	$ (56,915,000)