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RESTRICTED CASH AND INVESTMENTS (Details) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2019 USD ($) security | Jul. 01, 2018 USD ($) | Jun. 30, 2019 USD ($) security | Jul. 01, 2018 USD ($) | Dec. 30, 2018 USD ($) security
Restricted Cash and Investments [Line Items] |  |  |  |  |
Cash collateral held by insurance carriers | $ 23,877 |  | $ 23,877 |  | $ 24,182
Cash and cash equivalents held in Trust | 24,721 |  | 24,721 |  | 28,021
Investments held in Trust | 145,396 |  | 145,396 |  | 156,618
Deferred compensation mutual funds | 28,416 |  | 28,416 |  | 23,363
Other restricted cash and cash equivalents | 146 |  | 146 |  | 3,259
Restricted cash and investments | 222,556 |  | 222,556 |  | 235,443
Held-to-maturity Securities, Reconciliation to Fair Value [Abstract] |  |  |  |  |
Gross Unrealized Gain | 2,833 |  | 2,833 |  | 491
Gross Unrealized Loss | (75) |  | (75) |  | (1,468)
Fair Value | 148,154 |  | 148,154 |  | 155,641
Estimated fair value |  |  |  |  |
Less than 12 months | 0 |  | 0 |  | 36,743
12 months or more | 30,046 |  | 30,046 |  | 68,476
Total | 30,046 |  | 30,046 |  | 105,219
Unrealized losses |  |  |  |  |
Less than 12 months | 0 |  | 0 |  | (362)
12 months or more | (75) |  | (75) |  | (1,106)
Total | $ (75) |  | $ (75) |  | $ (1,468)
Securities in unrealized loss positions, number of positions | security | 28 |  | 28 |  | 93
Held-to-maturity Securities, Investment Maturities, Fair Value [Abstract] |  |  |  |  |
Fair Value | $ 148,154 |  | $ 148,154 |  | $ 155,641
Unrealized gain | 800 |  | 3,200 |  |
Unrealized loss |  | $ 100 |  | $ (100) |
Municipal debt securities |  |  |  |  |
Restricted Cash and Investments [Line Items] |  |  |  |  |
Investments held in Trust | 74,206 |  | 74,206 |  | 76,750
Held-to-maturity Securities, Reconciliation to Fair Value [Abstract] |  |  |  |  |
Gross Unrealized Gain | 1,883 |  | 1,883 |  | 456
Gross Unrealized Loss | (5) |  | (5) |  | (516)
Fair Value | 76,084 |  | 76,084 |  | 76,690
Estimated fair value |  |  |  |  |
Less than 12 months | 0 |  | 0 |  | 12,803
12 months or more | 5,992 |  | 5,992 |  | 22,638
Total | 5,992 |  | 5,992 |  | 35,441
Unrealized losses |  |  |  |  |
Less than 12 months | 0 |  | 0 |  | (74)
12 months or more | (5) |  | (5) |  | (442)
Total | (5) |  | (5) |  | (516)
Held-to-maturity Securities, Investment Maturities, Fair Value [Abstract] |  |  |  |  |
Fair Value | 76,084 |  | 76,084 |  | 76,690
Corporate debt securities |  |  |  |  |
Restricted Cash and Investments [Line Items] |  |  |  |  |
Investments held in Trust | 68,262 |  | 68,262 |  | 76,310
Held-to-maturity Securities, Reconciliation to Fair Value [Abstract] |  |  |  |  |
Gross Unrealized Gain | 883 |  | 883 |  | 30
Gross Unrealized Loss | (64) |  | (64) |  | (908)
Fair Value | 69,081 |  | 69,081 |  | 75,432
Estimated fair value |  |  |  |  |
Less than 12 months | 0 |  | 0 |  | 22,567
12 months or more | 23,378 |  | 23,378 |  | 44,463
Total | 23,378 |  | 23,378 |  | 67,030
Unrealized losses |  |  |  |  |
Less than 12 months | 0 |  | 0 |  | (277)
12 months or more | (64) |  | (64) |  | (631)
Total | (64) |  | (64) |  | (908)
Held-to-maturity Securities, Investment Maturities, Fair Value [Abstract] |  |  |  |  |
Fair Value | 69,081 |  | 69,081 |  | 75,432
Agency mortgage-backed securities |  |  |  |  |
Restricted Cash and Investments [Line Items] |  |  |  |  |
Investments held in Trust | 1,929 |  | 1,929 |  | 2,559
Held-to-maturity Securities, Reconciliation to Fair Value [Abstract] |  |  |  |  |
Gross Unrealized Gain | 21 |  | 21 |  | 5
Gross Unrealized Loss | (6) |  | (6) |  | (33)
Fair Value | 1,944 |  | 1,944 |  | 2,531
Estimated fair value |  |  |  |  |
Less than 12 months | 0 |  | 0 |  | 385
12 months or more | 676 |  | 676 |  | 1,375
Total | 676 |  | 676 |  | 1,760
Unrealized losses |  |  |  |  |
Less than 12 months | 0 |  | 0 |  | 0
12 months or more | (6) |  | (6) |  | (33)
Total | (6) |  | (6) |  | (33)
Held-to-maturity Securities, Investment Maturities, Fair Value [Abstract] |  |  |  |  |
Fair Value | 1,944 |  | 1,944 |  | 2,531
U.S. government and agency securities |  |  |  |  |
Restricted Cash and Investments [Line Items] |  |  |  |  |
Investments held in Trust | 999 |  | 999 |  | 999
Held-to-maturity Securities, Reconciliation to Fair Value [Abstract] |  |  |  |  |
Gross Unrealized Gain | 46 |  | 46 |  | 0
Gross Unrealized Loss | 0 |  | 0 |  | (11)
Fair Value | 1,045 |  | 1,045 |  | 988
Estimated fair value |  |  |  |  |
Less than 12 months |  |  |  |  | 988
12 months or more |  |  |  |  | 0
Total |  |  |  |  | 988
Unrealized losses |  |  |  |  |
Less than 12 months |  |  |  |  | (11)
12 months or more |  |  |  |  | 0
Total |  |  |  |  | (11)
Held-to-maturity Securities, Investment Maturities, Fair Value [Abstract] |  |  |  |  |
Fair Value | 1,045 |  | 1,045 |  | $ 988
Restricted Cash and Investments |  |  |  |  |
Restricted Cash and Investments [Line Items] |  |  |  |  |
Investments held in Trust | 145,396 |  | 145,396 |  |
Held-to-maturity Securities, Reconciliation to Fair Value [Abstract] |  |  |  |  |
Fair Value | 148,154 |  | 148,154 |  |
Held-to-maturity Securities, Investment Maturities, Amortized Cost [Abstract] |  |  |  |  |
Due in one year or less | 10,453 |  | 10,453 |  |
Due after one year through five years | 88,986 |  | 88,986 |  |
Due after five years through ten years | 45,957 |  | 45,957 |  |
Held-to-maturity Securities, Investment Maturities, Fair Value [Abstract] |  |  |  |  |
Due in one year or less | 10,442 |  | 10,442 |  |
Due after one year through five years | 90,201 |  | 90,201 |  |
Due after five years through ten years | 47,511 |  | 47,511 |  |
Fair Value | $ 148,154 |  | $ 148,154 |  |

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition The noncurrent cash, cash equivalents and investments that is restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits classified as long-term; that is not expected to be released from such existing restrictions within one year of the balance sheet date or operating cycle, whichever is longer. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. Includes noncurrent cash equivalents and investments that are similarly restricted as to withdrawal, usage or disposal. + References No definition available. + Details
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- Details
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- Details
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- Details
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- Details
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