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RESTRICTED CASH AND INVESTMENTS | 12 Months Ended
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Dec. 27, 2013
Restricted Cash and Investments [Abstract] |
RESTRICTED CASH AND INVESTMENTS | RESTRICTED CASH AND INVESTMENTS Restricted cash and investments consist principally of collateral that has been provided or pledged to insurance carriers for workers' compensation and state workers' compensation programs. Our insurance carriers and certain state workers' compensation programs require us to collateralize a portion of our workers' compensation obligation. The collateral typically takes the form of cash and cash equivalents and highly rated investment grade securities, primarily in municipal-debt securities, corporate-debt securities, asset-backed securities, and U.S. agency debentures. Our investments have not resulted in any other-than-temporary impairments. The following is a summary of restricted cash and investments (in millions):
| December 27, 2013 |  | December 28, 2012
Cash collateral held by insurance carriers | $ | 23.7 |  |  | $ | 21.5 |
Cash and cash equivalents held in Trust (1) | 31.5 |  |  | 14.8 |
Investments held in Trust | 86.7 |  |  | 91.2 |
Cash collateral backing letters of credit | 1.9 |  |  | 1.8 |
Other (2) | 10.8 |  |  | 7.0 |
Total restricted cash and investments | $ | 154.6 |  |  | $ | 136.3 |
(1) | Included in this amount is $0.8 million and $0.9 million of accrued interest at December 27, 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.
The following tables present fair value disclosures for our held-to-maturity investments, which are carried at amortized cost (in millions):
| December 27, 2013
| Amortized Cost |  | Gross Unrealized Gain |  | Gross Unrealized Loss |  | Fair Value
Municipal debt securities | $ | 54.1 |  |  | $ | 0.7 |  |  | $ | (0.4 | ) |  | $ | 54.4 |
Corporate debt securities | 19.7 |  |  | 0.2 |  |  | (0.3 | ) |  | 19.6 |
Asset-backed securities | 12.9 |  |  | 0.1 |  |  | (0.1 | ) |  | 12.9 |
| $ | 86.7 |  |  | $ | 1.0 |  |  | $ | (0.8 | ) |  | $ | 86.9 |
| December 28, 2012
| Amortized Cost |  | Gross Unrealized Gain |  | Gross Unrealized Loss |  | Fair Value
Municipal debt securities | $ | 57.3 |  |  | $ | 1.0 |  |  | $ | (0.1 | ) |  | $ | 58.2 |
Corporate debt securities | 17.9 |  |  | 0.3 |  |  | — |  |  | 18.2 |
Asset-backed securities | 16.0 |  |  | 0.3 |  |  | — |  |  | 16.3 |
| $ | 91.2 |  |  | $ | 1.6 |  |  | $ | (0.1 | ) |  | $ | 92.7 |
The amortized cost and fair value by contractual maturity of our held-to-maturity investments are as follows (in millions):
| December 27, 2013
| Amortized Cost |  | Fair Value
Due in one year or less | $ | 10.2 |  |  | $ | 10.2 |
Due after one year through five years | 42.1 |  |  | 42.8 |
Due after five years through ten years | 34.4 |  |  | 33.9 |
| $ | 86.7 |  |  | $ | 86.9 |
Actual maturities may differ from contractual maturities because the issuers of certain debt securities have the right to call or prepay their obligations without penalty.

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- Definition The entire disclosure for assets that are restricted in their use, generally by contractual agreements or regulatory requirements. This would include, but not limited to, a description of the restricted assets and the terms of the restriction. + References No definition available. + Details
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