Commitments and Contingencies (Narrative) (Details) $ in Millions	3 Months Ended
Apr. 01, 2018 USD ($) Lease_Option	Apr. 02, 2017 USD ($)
Operating Leased Assets [Line Items]
Lease renewal term	5 years
Rent expense \| $	$ 7.7	$ 7.1
Minimum
Operating Leased Assets [Line Items]
Lease renewal options	0
Maximum
Operating Leased Assets [Line Items]
Lease renewal options	3

Lessee Leasing Arrangements, Operating Leases, Renewal Options

No definition available.

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- Definition

Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

+ References

No definition available.

+ Details

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- Definition

Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980

+ Details

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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

No definition available.

+ Details

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