Goodwill and Acquired Intangibles (Details 2) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2023	Apr. 02, 2022
Amortization of acquired intangibles
Cost of product and maintenance	$ 10,260	$ 11,971
Amortization of acquired intangibles	4,267	4,964
Total amortization of acquired intangibles	$ 14,527	$ 16,935

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.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-URI https://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274

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