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Associate Retirement Plans - Components of Net Periodic Pension and Postretirement Benefit Cost (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Oct. 10, 2015
Oct. 04, 2014
Oct. 10, 2015
Oct. 04, 2014
SpartanNash Pension Plan [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Interest cost $ 767   $ 2,558  
Expected return on plan assets (1,136)   (3,787)  
Recognized actuarial net loss 191   636  
Net periodic (benefit) expense (178)   (593)  
Settlement expense 131   437  
Total (income) expense (47)   (156)  
Combined SpartanNash Pension Plan [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Interest cost   $ 1,017   $ 3,390
Expected return on plan assets   (1,399)   (4,664)
Recognized actuarial net loss   228   761
Net periodic (benefit) expense   (154)   (513)
Settlement expense   261   783
Total (income) expense   107   270
Cash Balance Pension Plan [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Interest cost   556   1,854
Expected return on plan assets   (867)   (2,891)
Recognized actuarial net loss   228   761
Net periodic (benefit) expense   (83)   (276)
Settlement expense   261   783
Total (income) expense   178   507
Super Foods Pension Plan [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Interest cost   461   1,536
Expected return on plan assets   (532)   (1,773)
Net periodic (benefit) expense   (71)   (237)
Total (income) expense   (71)   (237)
SERP [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Interest cost 8 8 25 27
Recognized actuarial net loss 10 7 32 23
Net periodic (benefit) expense 18 15 57 50
Spartan Stores Medical Plan [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 54 44 178 144
Interest cost 93 91 311 303
Amortization of prior service cost (36) (37) (121) (122)
Recognized actuarial net loss 40 4 133 15
Net periodic (benefit) expense $ 151 $ 102 $ 501 $ 340