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FAIR VALUE - Asset Measured at Fair Value (Details) - USD ($) $ in Thousands	Mar. 30, 2024	Dec. 30, 2023
Fixed Income | Restricted Investment
Fair Value
Investments at fair value	$ 27,200	$ 24,400
Money market funds | Cash and Cash Equivalents
Fair Value
Investments at fair value	184,600	498,500
Money market funds | Restricted Investment
Fair Value
Investments at fair value	1,800	400
Mutual funds, equity and alternative investments | Investments
Fair Value
Investments at fair value	37,000	34,800
Mutual funds, equity and alternative investments | Other Non current Assets
Fair Value
Investments at fair value	15,000	10,500
Money market and mutual funds | Other Non current Assets
Fair Value
Investments at fair value	100	100
Ardellis Insurance Ltd.
Fair Value
Total Fair Value	64,205	59,177
Estimate of Fair Value Measurement | Recurring
Fair Value
Investments at fair value	265,689	568,655
Estimate of Fair Value Measurement | Recurring | Fixed Income
Fair Value
Investments at fair value	26,883	24,088
Estimate of Fair Value Measurement | Recurring | Money market funds
Fair Value
Investments at fair value	186,436	498,933
Estimate of Fair Value Measurement | Recurring | Treasury securities
Fair Value
Investments at fair value	344	344
Estimate of Fair Value Measurement | Recurring | Equity
Fair Value
Investments at fair value	32,439	26,911
Estimate of Fair Value Measurement | Recurring | Alternative Investments
Fair Value
Investments at fair value	4,030	4,052
Estimate of Fair Value Measurement | Recurring | Mutual Fund
Fair Value
Investments at fair value	15,557	14,327
Estimate of Fair Value Measurement | Recurring | Domestic stock
Fair Value
Investments at fair value	14,514	13,330
Estimate of Fair Value Measurement | Recurring | International stock funds
Fair Value
Investments at fair value	540	509
Estimate of Fair Value Measurement | Recurring | Target funds
Fair Value
Investments at fair value	9	9
Estimate of Fair Value Measurement | Recurring | Bond funds
Fair Value
Investments at fair value	5	5
Estimate of Fair Value Measurement | Recurring | Alternative funds
Fair Value
Investments at fair value	489	474
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1)
Fair Value
Investments at fair value	217,899	528,994
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1) | Fixed Income
Fair Value
Investments at fair value	5,159	5,112
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1) | Money market funds
Fair Value
Investments at fair value	179,400	492,800
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1) | Treasury securities
Fair Value
Investments at fair value	344	344
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1) | Equity
Fair Value
Investments at fair value	17,439	16,411
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1) | Mutual Fund
Fair Value
Investments at fair value	15,557	14,327
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1) | Domestic stock
Fair Value
Investments at fair value	14,514	13,330
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1) | International stock funds
Fair Value
Investments at fair value	540	509
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1) | Target funds
Fair Value
Investments at fair value	9	9
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1) | Bond funds
Fair Value
Investments at fair value	5	5
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1) | Alternative funds
Fair Value
Investments at fair value	489	474
Estimate of Fair Value Measurement | Recurring | Prices with Other Observable Inputs (Level 2)
Fair Value
Investments at fair value	28,760	25,109
Estimate of Fair Value Measurement | Recurring | Prices with Other Observable Inputs (Level 2) | Fixed Income
Fair Value
Investments at fair value	21,724	18,976
Estimate of Fair Value Measurement | Recurring | Prices with Other Observable Inputs (Level 2) | Money market funds
Fair Value
Investments at fair value	7,036	6,133
Estimate of Fair Value Measurement | Recurring | Prices with Unobservable Inputs (Level 3)
Fair Value
Investments at fair value	19,030	14,552
Estimate of Fair Value Measurement | Recurring | Prices with Unobservable Inputs (Level 3) | Equity
Fair Value
Investments at fair value	15,000	10,500
Estimate of Fair Value Measurement | Recurring | Prices with Unobservable Inputs (Level 3) | Alternative Investments
Fair Value
Investments at fair value	$ 4,030	$ 4,052

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) and amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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-Topic 820
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Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

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