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Segment Information and Enterprise Reporting Long-lived assets by geographic area (Details) - USD ($) $ in Thousands	Sep. 26, 2020	Dec. 28, 2019
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	$ 267,824	$ 219,926
Concentration Risk, Long-lived Asset Geographic Area, Percentage	100.00%	100.00%
Reportable Geographical Components | United States (U.S.)
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	$ 238,525	$ 216,650
Concentration Risk, Long-lived Asset Geographic Area, Percentage	89.10%	98.50%
Reportable Geographical Components | International
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	$ 29,299	$ 3,276
Concentration Risk, Long-lived Asset Geographic Area, Percentage	10.90%	1.50%

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Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9038-108599

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