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RESTRICTED CASH AND INVESTMENTS (Tables) | 12 Months Ended
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Jan. 01, 2017
Restricted Cash and Investments [Abstract] |
Schedule of restricted cash and investments | The following is a summary of our restricted cash and investments:
(in thousands) | December 31, 2017 | January 1, 2017
Cash collateral held by insurance carriers | $ | 22,926 |  | $ | 34,910 |
Cash and cash equivalents held in Trust | 16,113 |  | 32,841 |
Investments held in Trust | 171,752 |  | 146,517 |
Other (1) | 28,440 |  | 16,925 |
Total restricted cash and investments | $ | 239,231 |  | $ | 231,193 |
(1) | Primarily consists of deferred compensation plan accounts, which are comprised of mutual funds classified as available-for-sale securities.
Schedule of held-to-maturity investments | The following tables present fair value disclosures for our held-to-maturity investments, which are carried at amortized cost:
| December 31, 2017
(in thousands) | Amortized cost | Gross unrealized gain | Gross unrealized loss | Fair value
Municipal debt securities | $ | 82,770 |  | $ | 974 |  | $ | (378 | ) | $ | 83,366 |
Corporate debt securities | 83,916 |  | 309 |  | (434 | ) | 83,791 |
Agency mortgage-backed securities | 4,066 |  | 22 |  | (26 | ) | 4,062 |
U.S. government and agency securities | 1,000 |  | 19 |  | — |  | 1,019 |
| $ | 171,752 |  | $ | 1,324 |  | $ | (838 | ) | $ | 172,238 |
| January 1, 2017
(in thousands) | Amortized cost | Gross unrealized gain | Gross unrealized loss | Fair value
Municipal debt securities | $ | 71,618 |  | $ | 443 |  | $ | (865 | ) | $ | 71,196 |
Corporate debt securities | 68,934 |  | 212 |  | (352 | ) | 68,794 |
Agency mortgage-backed securities | 5,965 |  | 30 |  | (32 | ) | 5,963 |
| $ | 146,517 |  | $ | 685 |  | $ | (1,249 | ) | $ | 145,953 |
Schedule of held-to-maturity investments by contractual maturity | The amortized cost and fair value by contractual maturity of our held-to-maturity investments are as follows:
| December 31, 2017
(in thousands) | Amortized cost | Fair value
Due in one year or less | $ | 17,265 |  | $ | 17,248 |
Due after one year through five years | 90,906 |  | 90,825 |
Due after five years through ten years | 63,581 |  | 64,165 |
| $ | 171,752 |  | $ | 172,238 |

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