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Employee Benefits - Single-Employer Defined Benefit Pension Plan - Narrative (Details) - USD ($)
$ in Thousands
 12 Months Ended
Jan. 02, 2016
Jan. 03, 2015
Jan. 04, 2014
Compensation and Retirement Disclosure [Abstract]      
Unfunded status $ (36,791) $ (41,763)  
Gain (loss) adjustment to other comprehensive income (loss) net of tax (400) 17,700 $ (13,900)
Gain on adjustment to other comprehensive income (loss) before tax     22,800
Tax expense from adjustment to other comprehensive income (loss)     8,900
Decrease in the unfunded obligation 5,000    
Actuarial gain 8,460 (15,797)  
Actual return on plan assets 2,820 (3,422)  
Employer contributions 5,263 $ 4,676  
Charge due to current year service and interest cost $ 6,100    
Change in discount rate 4.52% 4.19%  
Net periodic pension costs $ 730 $ 901 $ 4,591
Recognized net gain due to curtailments (300)    
Estimated net loss expected to be amortized from accumulated other comprehensive loss into net periodic cost over the next fiscal year 900    
Accumulated benefit obligation for the hourly pension plan $ 114,000 $ 120,500