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Nature of Operations and Summary of Significant Accounting Policies - Product Warranty (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Jan. 03, 2015
Dec. 28, 2013
Changes in the carrying amount of accrued warranty costs [Roll Forward]    
Balance at Beginning of Year $ 4,571us-gaap_StandardProductWarrantyAccrual $ 4,462us-gaap_StandardProductWarrantyAccrual
Provision charged to income 2,075us-gaap_StandardProductWarrantyAccrualWarrantiesIssued 1,565us-gaap_StandardProductWarrantyAccrualWarrantiesIssued
Usage (2,562)us-gaap_StandardProductWarrantyAccrualPayments (2,114)us-gaap_StandardProductWarrantyAccrualPayments
Acquired 150us-gaap_StandardProductWarrantyAccrualAdditionsFromBusinessAcquisition 567us-gaap_StandardProductWarrantyAccrualAdditionsFromBusinessAcquisition
Currency translation (359)us-gaap_StandardProductWarrantyAccrualCurrencyTranslationIncreaseDecrease 91us-gaap_StandardProductWarrantyAccrualCurrencyTranslationIncreaseDecrease
Balance at End of Year $ 3,875us-gaap_StandardProductWarrantyAccrual $ 4,571us-gaap_StandardProductWarrantyAccrual