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Note 7 - Pension Plans (Tables) - Pension Plan [Member] | 12 Months Ended
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Sep. 27, 2020
Notes Tables |
Schedule of Defined Benefit Plans Disclosures [Table Text Block] |
(Thousands of Dollars) |  | 2020 |  |  | 2019 |  |  | 2018 |
Service cost for benefits earned during the year |  |  | 1,361 |  |  |  | 36 |  |  |  | 48 |
Interest cost on projected benefit obligation |  |  | 7,577 |  |  |  | 6,563 |  |  |  | 5,754 |
Expected return on plan assets |  |  | (12,986 | ) |  |  | (8,073 | ) |  |  | (7,933 | )
Amortization of net loss |  |  | 3,166 |  |  |  | 1,135 |  |  |  | 2,025 |
Amortization of prior service benefit |  |  | (6 | ) |  |  | (100 | ) |  |  | (136 | )
Net periodic pension cost (benefit) |  |  | (888 | ) |  |  | (439 | ) |  |  | (242 | )
Changes in Projected Benefit Obligations, Fair Value of Plan Assets, and Funded Status of Plan [Table Text Block] |
(Thousands of Dollars) |  | 2020 |  |  | 2019 |
Benefit obligation, beginning of year |  |  | 192,369 |  |  |  | 176,531 |
Business combination |  |  | 195,834 |  |  |  | — |
Service cost |  |  | 1,361 |  |  |  | 36 |
Interest cost |  |  | 7,577 |  |  |  | 6,563 |
Actuarial loss (gain) |  |  | 20,525 |  |  |  | 20,687 |
Benefits paid |  |  | (16,246 | ) |  |  | (11,448 | )
Administrative expenses paid |  |  | (39 | ) |  |  | — |
Benefit obligation, end of year |  |  | 401,381 |  |  |  | 192,369 |
Fair value of plan assets, beginning of year: |  |  | 146,999 |  |  |  | 151,255 |
Business combination |  |  | 152,331 |  |  |  | — |
Actual return on plan assets |  |  | 44,933 |  |  |  | 8,705 |
Benefits paid |  |  | (16,246 | ) |  |  | (11,448 | )
Administrative expenses paid |  |  | (2,794 | ) |  |  | (2,163 | )
Employer contributions |  |  | 6,131 |  |  |  | 650 |
Fair value of plan assets, end of year |  |  | 331,354 |  |  |  | 146,999 |
Funded status |  |  | (70,027 | ) |  |  | (45,370 | )
Schedule of Amounts Recognized in Balance Sheet [Table Text Block] |
|  | September 27 |  |  | September 29 |
(Thousands of Dollars) |  | 2020 |  |  | 2019 |
Pension obligations |  |  | (70,027 | ) |  |  | (45,370 | )
Accumulated other comprehensive loss (before income taxes) |  |  | (41,344 | ) |  |  | (53,066 | )
Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block] |
|  | September 27 |  |  | September 29 |
(Thousands of Dollars) |  | 2020 |  |  | 2019 |
Unrecognized net actuarial loss |  | (41,344 | ) |  | (53,072 | )
Unrecognized prior service benefit |  | - |  |  | 6 |
|  |  | (41,344 | ) |  |  | (53,066 | )
Defined Benefit Plan, Assumptions [Table Text Block] |
|  | September 27 |  |  | September 29 |
(Percent) |  | 2020 |  |  | 2019 |
Discount rate |  | 2.8 |  |  | 3.1 |
(Percent) |  | 2020 |  |  | 2019 |  |  | 2018 |
Discount rate - service cost |  | 3.3 |  |  | 4.2 |  |  | 3.7 |
Discount rate - interest cost |  | 2.6 |  |  | 3.9 |  |  | 3.1 |
Expected long-term return on plan assets |  | 6.0 |  |  | 5.5 |  |  | 5.5 |
Schedule of Allocation of Plan Assets [Table Text Block] |
(Percent) |  | Policy Allocation |  |  |  | Actual Allocation |
|  | September 27 |  |  | September 27 |  |  | September 29 |
Asset Class |  | 2020 |  |  | 2020 |  |  | 2019 |
Equity securities |  | 50 |  |  | 48 |  |  | 49 |
Debt securities |  | 35 |  |  | 33 |  |  | 34 |
TIPS |  | 5 |  |  | 5 |  |  | 5 |
Hedge fund investments |  | 10 |  |  | 10 |  |  | 10 |
Cash and cash equivalents |  | — |  |  | 4 |  |  | 2 |
Schedule of Changes in Fair Value of Plan Assets [Table Text Block] |
(Thousands of Dollars) |  | NAV |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |
Cash and cash equivalents |  | — |  |  | 17,287 |  |  | — |  |  | — |
Domestic equity securities |  | 5,500 |  |  | 151,584 |  |  | 60,333 |  |  | — |
International equity securities |  | — |  |  | 6,893 |  |  | 7,396 |  |  | — |
Emerging equity securities |  | — |  |  | 7,225 |  |  | — |  |  | — |
TIPS |  | — |  |  | 6,967 |  |  | — |  |  | — |
Debt securities |  | — |  |  | 22,253 |  |  | 32,167 |  |  | — |
Hedge fund investments |  | 15,977 |  |  | — |  |  | — |  |  | — |
(Thousands of Dollars) |  | NAV |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |
Cash and cash equivalents |  |  | — |  |  |  | 2,970 |  |  |  | — |  |  |  | — |
Domestic equity securities |  |  | 9,524 |  |  |  | 8,971 |  |  |  | 40,593 |  |  |  | — |
International equity securities |  |  | — |  |  |  | 6,525 |  |  |  | 7,283 |  |  |  | — |
TIPS |  |  | — |  |  |  | 6,918 |  |  |  | — |  |  |  | — |
Debt securities |  |  | — |  |  |  | 26,392 |  |  |  | 24,190 |  |  |  | — |
Hedge fund investments |  |  | 15,733 |  |  |  | — |  |  |  | — |  |  |  | — |
Schedule of Expected Benefit Payments [Table Text Block] |
(Thousands of Dollars) |  |  |
2021 |  | 22,881 |
2022 |  | 22,385 |
2023 |  | 22,548 |
2024 |  | 22,630 |
2025 |  | 22,511 |
2026-2030 |  | 109,885 |

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- Definition Tabular disclosure of the net gain (loss) and net prior service cost or credit recognized in other comprehensive income (loss) for the period for pension plans and/or other employee benefit plans, and reclassification adjustments of other comprehensive income (loss) for the period, as those amounts, including amortization of the net transition asset or obligation, are recognized as components of net periodic benefit cost. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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