Restructuring Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		37 Months Ended
	Oct. 02, 2020	Sep. 27, 2019	Oct. 02, 2020	Sep. 27, 2019	Oct. 02, 2020	Dec. 31, 2019
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 1,541	$ 81	$ 7,820	$ 553
2017 Announced Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Total cost savings			8,000
Expected restructuring costs	9,700		9,700		$ 9,700
Restructuring costs	400	$ 100	400	$ 600	9,700
Restructuring Reserve	800		800		800	$ 400
G&A Reduction Effort [Member]
Restructuring Cost and Reserve [Line Items]
Total cost savings			12,400
Expected restructuring costs	3,900		3,900		$ 3,900
Severance costs	700		3,800
Bal Seal [Member]
Restructuring Cost and Reserve [Line Items]
Total cost savings			1,200
Severance costs			500
COVID-19 [Member]
Restructuring Cost and Reserve [Line Items]
Total cost savings			16,400
Severance costs	$ 500		$ 3,200