Goodwill and Other Intangible Assets, Net - Other Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 29, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross Amount	$ 168,538	$ 169,267
Accumulated Amortization	(80,801)	(78,260)
Customer lists / relationships
Finite-Lived Intangible Assets [Line Items]
Gross Amount	132,177	132,661
Accumulated Amortization	(64,166)	(61,968)
Developed technologies
Finite-Lived Intangible Assets [Line Items]
Gross Amount	19,548	19,729
Accumulated Amortization	(4,271)	(3,998)
Trademarks / trade names
Finite-Lived Intangible Assets [Line Items]
Gross Amount	8,640	8,747
Accumulated Amortization	(4,411)	(4,322)
Non-compete agreements and other
Finite-Lived Intangible Assets [Line Items]
Gross Amount	7,650	7,607
Accumulated Amortization	$ (7,506)	(7,527)
Patents
Finite-Lived Intangible Assets [Line Items]
Amortization Period	17 years
Gross Amount	$ 523	523
Accumulated Amortization	$ (447)	$ (445)
Minimum | Customer lists / relationships
Finite-Lived Intangible Assets [Line Items]
Amortization Period	6 years
Minimum | Developed technologies
Finite-Lived Intangible Assets [Line Items]
Amortization Period	10 years
Minimum | Trademarks / trade names
Finite-Lived Intangible Assets [Line Items]
Amortization Period	3 years
Minimum | Non-compete agreements and other
Finite-Lived Intangible Assets [Line Items]
Amortization Period	1 year
Maximum | Customer lists / relationships
Finite-Lived Intangible Assets [Line Items]
Amortization Period	26 years
Maximum | Developed technologies
Finite-Lived Intangible Assets [Line Items]
Amortization Period	20 years
Maximum | Trademarks / trade names
Finite-Lived Intangible Assets [Line Items]
Amortization Period	15 years
Maximum | Non-compete agreements and other
Finite-Lived Intangible Assets [Line Items]
Amortization Period	9 years