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Marketable Securities | 12 Months Ended
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Dec. 31, 2022
Investments, Debt and Equity Securities [Abstract] |
Marketable Securities | Note 2 Marketable Securities The Company’s marketable securities are all classified as available-for-sale within “Current Assets” in the Company’s Consolidated Balance Sheets. Financial Accounting Standards Board (FASB) has established three levels of inputs that may be used to measure fair value: Level 1Observable inputs such as quoted prices in active markets for identical assets or liabilities; Level 2Observable inputs, other than Level 1 inputs in active markets, that are observable either directly or indirectly; and Level 3Unobservable inputs for which there is little or no market data, which require the reporting entity to develop its own assumptions. The Company’s marketable securities valued using Level 1 inputs include four public company equity securities, for which quoted market prices are available. The Company’s bond and commercial paper portfolio is valued using Level 2 inputs. The Company’s corporate and municipal bonds and commercial paper are valued using a combination of pricing for similar securities, recently executed transactions, cash flow models with yield curves and other pricing models utilizing observable inputs, which are considered Level 2 inputs. For Level 2 investment valuation, the Company utilizes standard pricing procedures of its investment advisory firm(s), which include various third-party pricing services. These procedures also require specific price monitoring practices as well as pricing review reports, valuation oversight and pricing challenge procedures to maintain the most accurate representation of investment fair market value. The Company accrues interest on its bond and commercial paper portfolio throughout the life of each bond and commercial paper held. Dividends from the equity securities are recognized as received. Both interest and dividends are recognized in “Investment income and interest expense” on the Company’s Consolidated Statements of Income. The Company recognized investment income of $3.8 million, $1.6 million and $536 thousand which included unrealized losses of $1.3 million, $900 thousand, and $1.8 million in the fiscal years ended December 31, 2022, December 25, 2021 and December 26, 2020, respectively. Marketable securities, as of December 31, 2022 and December 25, 2021, consisted of: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Gross | ​ | Gross | ​ | ​ | ​
(amounts in thousands) | ​ | Amortized | ​ | Unrealized | ​ | Unrealized | ​ | Fair
December 31, 2022 |  | Cost |  | Holding Gains |  | Holding Losses |  | Value
Available-for-sale: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Level 1 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Equity securities | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | $ | 5,185
Level 2 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Corporate and municipal bonds | ​ | $ | 190,025 | ​ | $ | 2,110 | ​ | $ | (10,901) | ​ | ​ | 181,234
Total | ​ | $ | 190,025 | ​ | $ | 2,110 | ​ | $ | (10,901) | ​ | $ | 186,419
​ ​ ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Gross | ​ | Gross | ​ | ​ | ​
(amounts in thousands) | ​ | Amortized | ​ | Unrealized | ​ | Unrealized | ​ | Fair
December 25, 2021 |  | Cost |  | Holding Gains |  | Holding Losses |  | Value
Available-for-sale: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Level 1 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Equity securities | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | $ | 6,509
Level 2 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Corporate and municipal bonds | ​ | $ | 151,947 | ​ | $ | 4,753 | ​ | $ | (2,384) | ​ | ​ | 154,315
Commercial paper | ​ | ​ | 44,931 | ​ | ​ | 2 | ​ | ​ | (13) | ​ | ​ | 44,920
Total | ​ | $ | 196,878 | ​ | $ | 4,755 | ​ | $ | (2,397) | ​ | $ | 205,744
​ Note 2 Marketable Securities (continued) Maturities of marketable securities classified as available-for-sale at December 31, 2022, were as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Amortized | ​ | Fair
(amounts in thousands) |  | Cost |  | Value
Available-for-sale: | ​ | ​ | ​ | ​ | ​ | ​
Due within one year | ​ | $ | 50,645 | ​ | $ | 48,635
Due after one year through five years | ​ | ​ | 86,011 | ​ | ​ | 82,959
Due after five years through ten years | ​ | ​ | 29,923 | ​ | ​ | 26,843
Due after ten years | ​ | ​ | 23,446 | ​ | ​ | 22,797
Total | ​ | $ | 190,025 | ​ | $ | 181,234
​ SERP Investments The Company also maintains a non-qualified supplemental executive retirement plan for certain of its associates which allows them to defer income to future periods. Participants in the plans earn a return on their deferrals based on mutual fund investments. The Company chooses to invest in the underlying mutual fund investments to offset the liability associated with the non-qualified deferred compensation plans. Such investments are reported on the Company’s Consolidated Balance Sheets as “SERP investment,” are classified as trading securities and are measured at fair value using Level 1 inputs with gains and losses included in “Investment income and interest expense” on the Company’s Consolidated Statements of Income. The Company recognized investment loss of $3.8 million in the fiscal year ended December 31, 2022, and investment income of $3.4 million and $3.3 million in fiscal years ended December 25, 2021 and December 26, 2020, respectively. The changes in the underlying liability to the associates are recorded in “Other income (expense).”

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- Definition The entire disclosure for investments in certain debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -URI https://asc.fasb.org/subtopic&trid=2209399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -URI https://asc.fasb.org/subtopic&trid=2324412 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI https://asc.fasb.org/topic&trid=2196928 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -URI https://asc.fasb.org/subtopic&trid=2176304 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1403 -Paragraph (b) + Details
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