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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Jan. 01, 2017 | Dec. 25, 2015
Advertising expense | $ 7,300 | $ 7,800 | $ 9,100
Impairment loss | 0 | 65,869 | 0
Change in restricted cash | $ (21,505) | 19,773 | $ (18,374)
Minimum |  |  |
Operating leases, renewal option period | 3 years |  |
Reporting Unit, percentage of fair value in excess of carrying amount | 20.00% |  |
Maximum |  |  |
Operating leases, renewal option period | 5 years |  |
Building and Building Improvements |  |  |
Useful life | 40 years |  |
Computers and software | Minimum |  |  |
Useful life | 3 years |  |
Computers and software | Maximum |  |  |
Useful life | 10 years |  |
Furniture and equipment | Minimum |  |  |
Useful life | 3 years |  |
Furniture and equipment | Maximum |  |  |
Useful life | 10 years |  |
Trade name/trademarks |  |  |
Impairment of long-lived assets held-for-use |  | 4,500 |
Customer Relationships |  |  |
Impairment of intangible assets |  | 28,900 |
CLP and Spartan | Trade name/trademarks |  |  |
Impairment of intangible assets |  | $ 4,300 |

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