RESTRICTED CASH AND INVESTMENTS (Details) - USD ($) $ in Thousands	Jan. 01, 2017	Dec. 25, 2015
Restricted Cash and Investments [Line Items]
Cash collateral held by insurance carriers	$ 34,910	$ 23,634
Cash and cash equivalents held in Trust	32,841	26,046
Investments held in Trust	146,517	126,788
Other	16,925	11,944
Restricted cash and investments	231,193	188,412
Held-to-maturity Securities, Reconciliation to Fair Value [Abstract]
Gross Unrealized Gain	685	1,644
Gross Unrealized Loss	(1,249)	(187)
Fair Value	145,953	128,245
Held-to-maturity Securities, Investment Maturities, Fair Value [Abstract]
Fair Value	145,953	128,245
Municipal debt securities
Restricted Cash and Investments [Line Items]
Investments held in Trust	71,618	67,948
Held-to-maturity Securities, Reconciliation to Fair Value [Abstract]
Gross Unrealized Gain	443	1,345
Gross Unrealized Loss	(865)	(4)
Fair Value	71,196	69,289
Held-to-maturity Securities, Investment Maturities, Fair Value [Abstract]
Fair Value	71,196	69,289
Corporate debt securities
Restricted Cash and Investments [Line Items]
Investments held in Trust	68,934	50,462
Held-to-maturity Securities, Reconciliation to Fair Value [Abstract]
Gross Unrealized Gain	212	226
Gross Unrealized Loss	(352)	(152)
Fair Value	68,794	50,536
Held-to-maturity Securities, Investment Maturities, Fair Value [Abstract]
Fair Value	68,794	50,536
Agency mortgage-backed securities
Restricted Cash and Investments [Line Items]
Investments held in Trust	5,965	8,378
Held-to-maturity Securities, Reconciliation to Fair Value [Abstract]
Gross Unrealized Gain	30	73
Gross Unrealized Loss	(32)	(31)
Fair Value	5,963	8,420
Held-to-maturity Securities, Investment Maturities, Fair Value [Abstract]
Fair Value	5,963	$ 8,420
Restricted Cash and Investments [Member]
Restricted Cash and Investments [Line Items]
Investments held in Trust	146,517
Held-to-maturity Securities, Reconciliation to Fair Value [Abstract]
Fair Value	145,953
Held-to-maturity Securities, Investment Maturities, Amortized Cost [Abstract]
Due in one year or less	15,640
Due after one year through five years	73,973
Due after five years through ten years	56,904
Held-to-maturity Securities, Investment Maturities, Fair Value [Abstract]
Due in one year or less	15,666
Due after one year through five years	73,941
Due after five years through ten years	56,346
Fair Value	$ 145,953

Held-to-maturity Securities, Adjustments for Fair Value Calculation [Abstract]

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Carrying amount of cash and investment securities on deposit with state regulatory authorities in connection with capital requirements.

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Amount after other than temporary impairment (OTTI) accretion, of investments in debt securities classified as held-to-maturity.

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Fair value of held-to-maturity debt securities maturing in the sixth fiscal year through the tenth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Fair value of held-to-maturity debt securities maturing in the second fiscal year through the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Fair value of held-to-maturity debt securities maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Fair value of investments in debt securities classified as held-to-maturity.

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Amount of noncurrent assets that are pledged or subject to withdrawal restrictions, classified as other.

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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.

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