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Acquisition of BAM Labs, Inc. - Purchase Price Allocation (Details) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 09, 2015
Oct. 03, 2015
Sep. 27, 2014
Jan. 03, 2015
Dec. 28, 2013
Acquisition of BAM Labs, Inc. [Line Items]          
Name of acquired entity BAM Labs, Inc.        
Description of acquired entity the leading provider of biometric sensor and sleep monitoring for data-driven health and wellness        
Reason for acquisition The addition of BAM Labs strengthens Sleep Number’s leadership in sleep innovation, adjustability and individualization. The acquisition broadens and deepens electrical, biomedical, software and backend capabilities - API (application program interface) and bio-signal analysis. Our ownership and control of biometric data advances smart, connected products that empower our customers to ‘know better sleep.’        
Remeasured fair value - equity investment $ 12,900        
Cash payment - remaining capital stock 57,100        
Net assets acquired   $ 70,018 $ 0    
Acquisition of BAM Labs, Inc. Purchase Price Allocation          
Goodwill   65,164 $ 8,963 $ 8,963 $ 8,963
BAM Labs, Inc. [Member]          
Acquisition of BAM Labs, Inc. [Line Items]          
Net assets acquired   $ 70,000      
Acquisition of BAM Labs, Inc. Purchase Price Allocation          
Accounts receivable 104        
Inventory 98        
Other current assets 98        
Property and equipment 91        
Deferred income taxes 954        
Goodwill 56,201        
Intangible Assets 13,619        
Total assets acquired 71,165        
Accounts Payable 267        
Other current liabilities 322        
Other liabilities 558        
Total liabilities acquired 1,147        
Net assets acquired 70,018        
Other Noncurrent Assets [Member]          
Acquisition of BAM Labs, Inc. [Line Items]          
Equity investment original cost $ 6,000