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Summary of Significant Accounting Policies and Basis of Presentation - Summary of Changes in SpartanNash's Self-Insurance Liability (Detail) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
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Dec. 28, 2013 | Jan. 02, 2016 | Jan. 03, 2015
Payables And Accruals [Abstract] |  |  |
Balance at beginning of period | $ 7,167 | $ 19,413 | $ 22,454
Balance assumed in merger | 13,248 |  |
Expenses | 25,291 | 43,851 | 53,297
Claim payments, net of employee contributions | (23,252) | (48,798) | (56,338)
Balance at end of period | $ 22,454 | $ 14,466 | $ 19,413

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- Definition Addition to insurance liability related to merger. + References No definition available. + Details
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- Definition Deduction in insurance liability related to claim payments. + References No definition available. + Details
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- Definition Carrying value as of the balance sheet date of obligations incurred through that date and payable to insurance entities to mitigate potential loss from various risks or to satisfy a promise to provide certain coverage's to employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15(5)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15(5)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 15 -Subparagraph a -Article 7 + Details
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