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RESTRICTED CASH AND INVESTMENTS | 9 Months Ended
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Sep. 23, 2016
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, and asset-backed securities. The majority of our collateral obligations are held in a trust at the Bank of New York Mellon ("Trust"). Our investments have not resulted in any other-than-temporary impairments. The following is a summary of our restricted cash and investments (in thousands):
| September 23, 2016 |  | December 25, 2015
Cash collateral held by insurance carriers | $ | 27,172 |  |  | $ | 23,634 |
Cash and cash equivalents held in Trust | 21,101 |  |  | 26,046 |
Investments held in Trust | 148,811 |  |  | 126,788 |
Other (1) | 15,884 |  |  | 11,944 |
Total restricted cash and investments | $ | 212,968 |  |  | $ | 188,412 |
(1) | Primarily consists of deferred compensation plan accounts, which are comprised of mutual funds classified as available-for-sale securities.
The following tables present fair value disclosures for our held-to-maturity investments, which are carried at amortized cost (in thousands):
| September 23, 2016
| Amortized Cost |  | Gross Unrealized Gain |  | Gross Unrealized Loss |  | Fair Value
Municipal debt securities | $ | 72,776 |  |  | $ | 2,186 |  |  | $ | (37 | ) |  | $ | 74,925 |
Corporate debt securities | 69,552 |  |  | 1,510 |  |  | (13 | ) |  | 71,049 |
Agency mortgage-backed securities | 6,483 |  |  | 107 |  |  | (1 | ) |  | 6,589 |
| $ | 148,811 |  |  | $ | 3,803 |  |  | $ | (51 | ) |  | $ | 152,563 |
| December 25, 2015
| Amortized Cost |  | Gross Unrealized Gain |  | Gross Unrealized Loss |  | Fair Value
Municipal debt securities | $ | 67,948 |  |  | $ | 1,345 |  |  | $ | (4 | ) |  | $ | 69,289 |
Corporate debt securities | 50,462 |  |  | 226 |  |  | (152 | ) |  | 50,536 |
Agency mortgage-backed securities | 8,378 |  |  | 73 |  |  | (31 | ) |  | 8,420 |
| $ | 126,788 |  |  | $ | 1,644 |  |  | $ | (187 | ) |  | $ | 128,245 |
The amortized cost and fair value by contractual maturity of our held-to-maturity investments are as follows (in thousands):
| September 23, 2016
| Amortized Cost |  | Fair Value
Due in one year or less | $ | 14,051 |  |  | $ | 14,092 |
Due after one year through five years | 76,590 |  |  | 77,854 |
Due after five years through ten years | 58,170 |  |  | 60,617 |
| $ | 148,811 |  |  | $ | 152,563 |
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. We have no significant concentrations of counterparties in our held-to-maturity investment portfolio.

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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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