Stock-Based Compensation - Summary of Share-based Payment Expense Recognized as a Reduction of Net Sales in Condensed Consolidated Statements of Operations (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jul. 13, 2024	Jul. 15, 2023	Jul. 13, 2024	Jul. 15, 2023
Share-Based Payment Arrangement, Additional Disclosure [Abstract]
Warrant expense	$ 190	$ 353	$ 516	$ 960
Income tax benefit	(13)	(31)	(55)	(95)
Warrant expense, net of tax	$ 177	$ 322	$ 461	$ 865

Class of warrant or right stock based compensation expense net of tax.

No definition available.

Name:	sptn_ClassOfWarrantOrRightStockBasedCompensationExpenseNetOfTax
Namespace Prefix:	sptn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration