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Associate Retirement Plans (Tables) | 4 Months Ended
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Apr. 23, 2016
Compensation And Retirement Disclosure [Abstract] |
Components of Net Periodic Pension and Postretirement Benefit Costs | The following table provides the components of net periodic pension and postretirement benefit costs for the 16 weeks ended April 23, 2016 and April 25, 2015:
| SpartanNash Company Pension Plan |  |  | SpartanNash Medical Plan |
| April 23, |  |  | April 25, |  |  | April 23, |  |  | April 25, |
(In thousands) | 2016 |  |  | 2015 |  |  | 2016 |  |  | 2015 |
16 Weeks Ended |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Service cost | $ |  | — |  |  | $ |  | — |  |  | $ |  | 58 |  |  | $ |  | 71 |
Interest cost |  |  | 753 |  |  |  |  | 1,023 |  |  |  |  | 106 |  |  |  |  | 125 |
Amortization of prior service cost |  |  | — |  |  |  |  | — |  |  |  |  | (49 | ) |  |  |  | (49 | )
Expected return on plan assets |  |  | (1,324 | ) |  |  |  | (1,515 | ) |  |  |  | — |  |  |  |  | — |
Recognized actuarial net loss |  |  | 34 |  |  |  |  | 255 |  |  |  |  | 13 |  |  |  |  | 53 |
Net periodic benefit | $ |  | (537 | ) |  | $ |  | (237 | ) |  | $ |  | 128 |  |  | $ |  | 200 |
Settlement expense |  |  | 213 |  |  |  |  | 175 |  |  |  |  | — |  |  |  |  | — |
Total expense (income) | $ |  | (324 | ) |  | $ |  | (62 | ) |  | $ |  | 128 |  |  | $ |  | 200 |

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- Definition Tabular disclosure of one or more of the entity's defined benefit pension plans or one or more other defined benefit postretirement plans, separately for pension plans and other postretirement benefit plans including the entity's schedule of fair value of plan assets for defined benefit or other postretirement plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e2439-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e2417-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e2410-114920 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=58242635&loc=d3e4179-114921 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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