Commitments and Contingencies (Narratives) (Details)		12 Months Ended
	Jan. 26, 2016 USD ($) patent	Jan. 01, 2016 USD ($)	Jan. 02, 2015 USD ($)	Jan. 03, 2014 USD ($)
Gain Contingencies [Line Items]
Direct operating cost, royalty expense		$ 2,400,000	$ 3,300,000	$ 3,500,000
Standard product warranty description		The Company generally warrants that its products will meet customer specifications and will be free from defects in materials and workmanship.
Purchase commitment description		Contractual obligations for purchase of goods or services are defined as agreements that are enforceable and legally binding on the Company and that specify all significant terms, including: fixed or minimum quantities to be purchased; fixed, minimum or variable price provisions; and the approximate timing of the transaction. The Company’s purchase orders are normally based on its current manufacturing needs and are fulfilled by its vendors within short time horizons. The Company enters into blanket orders with vendors that have preferred pricing and terms, however these orders are normally cancelable by us without penalty.
Remaining minimum amount committed		$ 63,700,000
Maximum Loss Per Associate Under Stop Loss Insurance		250,000
Accrued Self Insured Medical Plan Liability		4,000,000	1,800,000
Increase in Workers' Compensation Liability		900,000
Workers' Compensation Liability		3,900,000	$ 0
Gain (Loss) Related to Litigation Settlement		$ 0
Loss Contingency, Opinion of Counsel		The Company believes these allegations are without merit and has concluded that any potential loss related to these allegations is not probable
Estimated Litigation Liability, Current		$ 0
Lake Region Medical [Member]
Gain Contingencies [Line Items]
Maximum Loss Per Associate Under Stop Loss Insurance		275,000
Other Noncurrent Liabilities [Member]
Gain Contingencies [Line Items]
Accrual for Environmental Loss Contingencies		$ 1,100,000
Subsequent Event [Member] | Positive Outcome of Litigation [Member]
Gain Contingencies [Line Items]
Number of patents found infringed upon | patent	2
Settlement amount	$ 37,500,000