Supplemental Cash Flow Information (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012
Supplemental Cash Flow Information [Abstract]
Payments for interest	$ 1.8us-gaap_InterestPaid	$ 16.3us-gaap_InterestPaid	$ 8.7us-gaap_InterestPaid
Income taxes	10.7us-gaap_IncomeTaxesPaid	10.8us-gaap_IncomeTaxesPaid	10.8us-gaap_IncomeTaxesPaid
Capital expenditures incurred but not yet paid	1.6	1.1	0.5
New capital lease obligation and related capitalized assets	$ 0.2us-gaap_CapitalLeaseObligationsIncurred	$ 0.1us-gaap_CapitalLeaseObligationsIncurred	$ 0us-gaap_CapitalLeaseObligationsIncurred

Future cash outflow to pay for purchases of fixed assets that have occurred.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

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The increase during the period in capital lease obligations due to entering into new capital leases.

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The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income.

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The amount of cash paid for interest during the period.

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