The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Goodwill and Intangible Assets - Amortization Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 28, 2020	Mar. 30, 2019	Dec. 28, 2019
Property, Plant and Equipment [Line Items]
Amortization of intangible assets	$ 7,263	$ 7,090
Finite-Lived Intangible Assets, Net, Amortization Expense, Rolling Maturity [Abstract]
Remainder of 2020	19,021
2019	14,767
2020	5,585
2021	3,846
2022	2,107
Intangible Assets, Net	50,139		$ 57,610
Finite-Lived Intangible Assets, Amortization Expense, after Year Five	4,813
Cost of revenues
Property, Plant and Equipment [Line Items]
Amortization of intangible assets	5,750	4,719
Selling, general and administrative
Property, Plant and Equipment [Line Items]
Amortization of intangible assets	$ 1,513	$ 2,371