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Associate Retirement Plans - Schedule of Benefit Obligations, Pension & Other Long-Term Liabilities (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Jan. 02, 2021 | Dec. 28, 2019 | Dec. 29, 2018
Pension Plan [Member] |  |  |
Projected/Accumulated benefit obligation: |  |  |
Balance at beginning of year |  | $ 73,275 |
Interest cost |  | 1,134 | $ 2,283
Actuarial loss |  | 618 |
Benefits paid |  | (75,027) |
Balance at end of year |  |  | 73,275
Fair value of plan assets: |  |  |
Balance at beginning of year | $ 1,496 | 74,241 |
Actual return on plan assets |  | 2,282 |
Refund from annuity provider | 1,193 |  |
Benefits paid |  | (75,027) |
Balance at end of year | 2,689 | 1,496 | 74,241
Funded (unfunded) status | 2,689 | 1,496 |
Components of net amount recognized in financial position: |  |  |
Current assets | 2,689 | 1,496 |
Net asset (liability) | 2,689 | 1,496 |
Retiree Medical Plan [Member] |  |  |
Projected/Accumulated benefit obligation: |  |  |
Balance at beginning of year | 10,783 | 9,443 |
Service cost | 182 | 171 | 195
Interest cost | 303 | 375 | 339
Actuarial loss | 1,027 | 1,181 |
Benefits paid | (386) | (387) |
Balance at end of year | 11,909 | 10,783 | $ 9,443
Fair value of plan assets: |  |  |
Company contributions | 386 | 387 |
Benefits paid | (386) | (387) |
Funded (unfunded) status | (11,909) | (10,783) |
Components of net amount recognized in financial position: |  |  |
Current liabilities | (471) | (466) |
Noncurrent liabilities | (11,438) | (10,317) |
Net asset (liability) | (11,909) | (10,783) |
Amounts recognized in AOCI: |  |  |
Net actuarial loss | 2,732 | 1,809 |
Accumulated other comprehensive loss | $ 2,732 | $ 1,809 |
Weighted average assumptions at measurement date: |  |  |
Discount rate | 2.57% | 3.26% |
Ultimate health care cost trend rate | 4.50% | 4.50% |

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- Definition Amount, after tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=121641772&loc=SL7669686-108580 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (i-k) -URI http://asc.fasb.org/extlink&oid=121641772&loc=SL7669646-108580 + Details
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- Definition Amount of payment to participant of defined benefit plan which decreases benefit obligation. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(6) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6414203&loc=d3e39716-114964 + Details
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