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Intangible and Other Assets (Narrative) (Details) - USD ($) $ in Thousands		12 Months Ended
	Jan. 16, 2019	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Finite-Lived Intangible Assets [Line Items]
Finite intangible assets		$ 65,515	$ 95,599
Amortization expense for intangible assets		7,100	11,900	$ 13,500
Trade name
Finite-Lived Intangible Assets [Line Items]
Finite intangible assets		$ 4,502	$ 0
Useful lives		6 years
Google, Inc.
Finite-Lived Intangible Assets [Line Items]
Proceeds from sale of intangible asset	$ 40,000
Reduction in intangible asset	18,400
Gain on sale of intangible asset	$ 21,600

X

- Definition

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.

+ References

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- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 928
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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- Definition

Amount of gain (loss) on sale or disposal of intangible assets.

+ References

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-Publisher FASB
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- Definition

The cash inflow from disposal of asset without physical form usually arising from contractual or other legal rights, excluding goodwill.

+ References

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- Definition

Amount of significant reductions in the period of other assets (current, noncurrent, or unclassified).

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