Goodwill and Other Intangible Assets - Amortization Expense (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Oct. 02, 2021	Sep. 26, 2020	Oct. 02, 2021	Sep. 26, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Capitalized software	$ 6,070	$ 4,910	$ 17,497	$ 14,288
Other definite-lived intangibles	$ 1,626	$ 1,136	$ 4,881	$ 3,811

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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