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RESTRICTED CASH AND INVESTMENTS (Details) (USD $) | Jun. 28, 2013 | Dec. 28, 2012
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Restricted Cash and Investments [Line Items] |  |  |  |
Cash collateral held by insurance carriers | $ 24,600,000 |  | $ 21,500,000 |
Cash and cash equivalents held in Trust | 16,600,000 | [1] | 14,800,000 | [1]
Investments held in Trust | 85,900,000 |  | 91,200,000 |
Cash collateral backing letters of credit | 1,800,000 |  | 1,800,000 |
Other | 5,200,000 |  | 7,000,000 | [2]
Total restricted cash and investments | 134,052,000 |  | 136,259,000 |
Accrued interest on trust investments | 800,000 |  | 900,000 |
Held-to-maturity Securities, Reconciliation to Fair Value [Abstract] |  |  |  |
Amortized Cost | 85,900,000 |  | 91,200,000 |
Gross Unrealized Gain | 900,000 |  | 1,600,000 |
Gross Unrealized Loss | (800,000) |  | (100,000) |
Fair Value | 86,000,000 |  | 92,700,000 |
Held-to-maturity Securities, Investment Maturities, Amortized Cost [Abstract] |  |  |  |
Due in one year or less | 9,000,000 |  |  |
Due after one year through five years | 43,100,000 |  |  |
Due after five years through ten years | 33,800,000 |  |  |
Amortized Cost | 85,900,000 |  | 91,200,000 |
Held-to-maturity Securities, Investment Maturities, Fair Value [Abstract] |  |  |  |
Due in one year or less | 9,000,000 |  |  |
Due after one year through five years | 43,500,000 |  |  |
Due after five years through ten years | 33,500,000 |  |  |
Fair Value | 86,000,000 |  | 92,700,000 |
Municipal securities |  |  |  |
Held-to-maturity Securities, Reconciliation to Fair Value [Abstract] |  |  |  |
Amortized Cost | 55,600,000 |  | 57,300,000 |
Gross Unrealized Gain | 600,000 |  | 1,000,000 |
Gross Unrealized Loss | (400,000) |  | (100,000) |
Fair Value | 55,800,000 |  | 58,200,000 |
Held-to-maturity Securities, Investment Maturities, Amortized Cost [Abstract] |  |  |  |
Amortized Cost | 55,600,000 |  | 57,300,000 |
Held-to-maturity Securities, Investment Maturities, Fair Value [Abstract] |  |  |  |
Fair Value | 55,800,000 |  | 58,200,000 |
Corporate bonds |  |  |  |
Held-to-maturity Securities, Reconciliation to Fair Value [Abstract] |  |  |  |
Amortized Cost | 15,600,000 |  | 17,900,000 |
Gross Unrealized Gain | 200,000 |  | 300,000 |
Gross Unrealized Loss | (300,000) |  | 0 |
Fair Value | 15,500,000 |  | 18,200,000 |
Held-to-maturity Securities, Investment Maturities, Amortized Cost [Abstract] |  |  |  |
Amortized Cost | 15,600,000 |  | 17,900,000 |
Held-to-maturity Securities, Investment Maturities, Fair Value [Abstract] |  |  |  |
Fair Value | 15,500,000 |  | 18,200,000 |
Asset backed bonds |  |  |  |
Held-to-maturity Securities, Reconciliation to Fair Value [Abstract] |  |  |  |
Amortized Cost | 14,700,000 |  | 16,000,000 |
Gross Unrealized Gain | 100,000 |  | 300,000 |
Gross Unrealized Loss | (100,000) |  | 0 |
Fair Value | 14,700,000 |  | 16,300,000 |
Held-to-maturity Securities, Investment Maturities, Amortized Cost [Abstract] |  |  |  |
Amortized Cost | 14,700,000 |  | 16,000,000 |
Held-to-maturity Securities, Investment Maturities, Fair Value [Abstract] |  |  |  |
Fair Value | $ 14,700,000 |  | $ 16,300,000 |
[1] | Included in this amount is $0.8 million and $0.9 million of accrued interest at June 28, 2013 and December 28, 2012, respectively.
[2] | Primarily consists of restricted cash in money market accounts and deferred compensation plan accounts which are comprised of mutual funds.

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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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