Associate Retirement Plans	4 Months Ended
Apr. 21, 2018
Compensation And Retirement Disclosure [Abstract]
Associate Retirement Plans	Note 8 – Associate Retirement Plans During the first quarter and the prior year quarter, the Company recognized net periodic pension income of $0.1 million and $0.2 million, respectively, related to the SpartanNash Company Pension Plan (“Pension Plan” or “Plan”) and net postretirement benefit costs of $0.1 million in both periods related to the SpartanNash Retiree Medical Plan. Substantially all of these amounts are included in Other, net in the Condensed Consolidated Statements of Earnings. On February 28, 2018, the Company’s Board of Directors granted approval to proceed with terminating the frozen Pension Plan. The Company will offer participants the option to receive an annuity or lump sum distribution which may be rolled over into another qualified plan, and subsequently terminate the Pension Plan. The termination process is expected to take 12 to 24 months. In connection with the termination of the Plan, the Company expects to incur a one-time, pre-tax settlement charge of approximately $22 million to recognize the deferred losses in AOCI upon distribution of the Plan assets and related recognition of the settlement. The Company also expects to reduce administrative fees and premium funding costs as a result of the Plan termination. The Company did not make any contributions to the SpartanNash Company Pension Plan during the first quarter of 2018. Although no contributions are required, the Company expects to contribute approximately $2.0 to $3.0 million to the Pension Plan in 2018 to fund the plan termination liability. The Company expects to make contributions in 2018 of $0.4 million to the Retiree Medical Plan. The Company’s retirement programs also include defined contribution plans providing contributory benefits, as well as executive compensation plans for a select group of management personnel and/or highly compensated associates. Multi-Employer Plans In addition to the plans listed above, the Company participates in the Central States Southeast and Southwest Pension Fund, the Michigan Conference of Teamsters and Ohio Conference of Teamsters Health and Welfare plans (collectively referred to as “multi-employer plans”), and other company-sponsored defined contribution plans for most associates covered by collective bargaining agreements. With respect to the Company’s participation in the Central States Plan, expense is recognized as contributions are funded. The Company’s contributions during the first quarter and prior year quarter were $4.5 million and $4.4 million, respectively. See Note 7 for further information regarding the Company’s participation in the Central States Plan.

Note 8 – Associate Retirement Plans

During the first quarter and the prior year quarter, the Company recognized net periodic pension income of $0.1 million and $0.2 million, respectively, related to the SpartanNash Company Pension Plan (“Pension Plan” or “Plan”) and net postretirement benefit costs of $0.1 million in both periods related to the SpartanNash Retiree Medical Plan. Substantially all of these amounts are included in Other, net in the Condensed Consolidated Statements of Earnings.

On February 28, 2018, the Company’s Board of Directors granted approval to proceed with terminating the frozen Pension Plan. The Company will offer participants the option to receive an annuity or lump sum distribution which may be rolled over into another qualified plan, and subsequently terminate the Pension Plan. The termination process is expected to take 12 to 24 months. In connection with the termination of the Plan, the Company expects to incur a one-time, pre-tax settlement charge of approximately $22 million to recognize the deferred losses in AOCI upon distribution of the Plan assets and related recognition of the settlement. The Company also expects to reduce administrative fees and premium funding costs as a result of the Plan termination.

The Company did not make any contributions to the SpartanNash Company Pension Plan during the first quarter of 2018. Although no contributions are required, the Company expects to contribute approximately $2.0 to $3.0 million to the Pension Plan in 2018 to fund the plan termination liability. The Company expects to make contributions in 2018 of $0.4 million to the Retiree Medical Plan.

The Company’s retirement programs also include defined contribution plans providing contributory benefits, as well as executive compensation plans for a select group of management personnel and/or highly compensated associates.

Multi-Employer Plans

In addition to the plans listed above, the Company participates in the Central States Southeast and Southwest Pension Fund, the Michigan Conference of Teamsters and Ohio Conference of Teamsters Health and Welfare plans (collectively referred to as “multi-employer plans”), and other company-sponsored defined contribution plans for most associates covered by collective bargaining agreements.

With respect to the Company’s participation in the Central States Plan, expense is recognized as contributions are funded. The Company’s contributions during the first quarter and prior year quarter were $4.5 million and $4.4 million, respectively. See Note 7 for further information regarding the Company’s participation in the Central States Plan.