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Business and Summary of Significant Accounting Policies Warranty Liabilities (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Jan. 03, 2015 | Dec. 28, 2013 | Dec. 29, 2012
Movement in Standard Product Warranty Accrual [Roll Forward] |  |  |
Balance at beginning of year | $ 4,153 us-gaap_StandardProductWarrantyAccrual | $ 4,858 us-gaap_StandardProductWarrantyAccrual | $ 6,310 us-gaap_StandardProductWarrantyAccrual
Additions charged to costs and expenses for current-year sales | 9,437 us-gaap_StandardProductWarrantyAccrualWarrantiesIssued | 4,603 us-gaap_StandardProductWarrantyAccrualWarrantiesIssued | 4,114 us-gaap_StandardProductWarrantyAccrualWarrantiesIssued
Deductions from reserves | (8,118)us-gaap_StandardProductWarrantyAccrualPayments | (6,070)us-gaap_StandardProductWarrantyAccrualPayments | (5,094)us-gaap_StandardProductWarrantyAccrualPayments
Changes in liability for pre-existing warranties during the current year, including expirations | 352 us-gaap_StandardProductWarrantyAccrualPreexistingIncreaseDecrease | 230 us-gaap_StandardProductWarrantyAccrualPreexistingIncreaseDecrease | (472)us-gaap_StandardProductWarrantyAccrualPreexistingIncreaseDecrease
Acquired warranty reserve | 0 us-gaap_StandardProductWarrantyAccrualAdditionsFromBusinessAcquisition | 532 us-gaap_StandardProductWarrantyAccrualAdditionsFromBusinessAcquisition | 0 us-gaap_StandardProductWarrantyAccrualAdditionsFromBusinessAcquisition
Balance at end of period | $ 5,824 us-gaap_StandardProductWarrantyAccrual | $ 4,153 us-gaap_StandardProductWarrantyAccrual | $ 4,858 us-gaap_StandardProductWarrantyAccrual

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- Definition Amount as of the balance sheet date of the aggregate standard product warranty liability. Does not include the balance for the extended product warranty liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (c)(1),(c)(5) -URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249 + Details
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- Definition Liability for a standard product warranty acquired in a business acquisition. Does not include any liability for an extended warranty acquired in a business acquisition. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249 + Details
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- Definition Represents the aggregate decrease in the liability for payments made (in cash or in kind) to satisfy claims under the terms of the standard product warranty. Does not include any Increase or Decrease in the liability for payments related to extended product warranties. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph ((c)(2)) -URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249 + Details
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- Definition Represents the aggregate Increase or Decrease in the liability during the reporting period for accruals related to preexisting standard product warranties (including adjustments related to changes in estimates). Does not include any Increase or Decrease in the liability for accruals related to extended product warranties. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph ((c)(4)) -URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249 + Details
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- Definition Represents the aggregate increase in the liability for accruals related to standard product warranties issued during the reporting period. Does not include any increase in the liability for accruals related to extended product warranties. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph ((c)(3)) -URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249 + Details
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