Annual report pursuant to Section 13 and 15(d)

Environmental Compliance Costs (Details)

v3.3.1.900
Environmental Compliance Costs (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
USD ($)
solid_waste_management_units
environmental_remediation_sites
Jan. 03, 2015
USD ($)
Environmental Exit Cost [Line Items]    
Environmental remediation reserves $ 551 $ 576
Minimum [Member]    
Environmental Exit Cost [Line Items]    
Environmental remediation costs, period of recognition (years) 3 years  
Maximum [Member]    
Environmental Exit Cost [Line Items]    
Environmental remediation costs, period of recognition (years) 4 years  
Comprehensive Environmental Response, Compensation, and Liability Act [Member]    
Environmental Exit Cost [Line Items]    
Number of environmental remediation sites (sites) | environmental_remediation_sites 1  
Augusta Plant [Member]    
Environmental Exit Cost [Line Items]    
Environmental remediation reserves $ 476 501
Bristol, Tennessee Facility [Member]    
Environmental Exit Cost [Line Items]    
Environmental remediation reserves $ 75 $ 75
Number of solid waste management units | solid_waste_management_units 2