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FAIR VALUE MEASUREMENT (Details) - USD ($) $ in Thousands | Oct. 01, 2017 | Jan. 01, 2017
--- | --- | ---
Fair Value Measurement [Line Items] |  |
Other restricted assets | $ 21,115 | $ 16,925
Restricted investments classified as held-to-maturity | 165,053 | 145,953
Contingent consideration | 0 | 21,600
Total Fair Value |  |
Fair Value Measurement [Line Items] |  |
Cash and cash equivalents | 35,055 | 34,970
Total Fair Value | Restricted Assets |  |
Fair Value Measurement [Line Items] |  |
Restricted cash and cash equivalents | 59,788 | 67,751
Other restricted assets | 21,115 | 16,925
Restricted investments classified as held-to-maturity | 165,053 | 145,953
Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Fair Value Measurement [Line Items] |  |
Cash and cash equivalents | 35,055 | 34,970
Quoted Prices in Active Markets for Identical Assets (Level 1) | Restricted Assets |  |
Fair Value Measurement [Line Items] |  |
Restricted cash and cash equivalents | 59,788 | 67,751
Other restricted assets | 21,115 | 16,925
Restricted investments classified as held-to-maturity | 0 | 0
Significant Other Observable Inputs (Level 2) |  |
Fair Value Measurement [Line Items] |  |
Cash and cash equivalents | 0 | 0
Significant Other Observable Inputs (Level 2) | Restricted Assets |  |
Fair Value Measurement [Line Items] |  |
Restricted cash and cash equivalents | 0 | 0
Other restricted assets | 0 | 0
Restricted investments classified as held-to-maturity | 165,053 | 145,953
Significant Unobservable Inputs (Level 3) |  |
Fair Value Measurement [Line Items] |  |
Cash and cash equivalents | 0 | 0
Significant Unobservable Inputs (Level 3) | Restricted Assets |  |
Fair Value Measurement [Line Items] |  |
Restricted cash and cash equivalents | 0 | 0
Other restricted assets | 0 | 0
Restricted investments classified as held-to-maturity | $ 0 | 0
SIMOS Insourcing Solutions Corporation | Total Fair Value |  |
Fair Value Measurement [Line Items] |  |
Contingent consideration |  | 21,600
SIMOS Insourcing Solutions Corporation | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Fair Value Measurement [Line Items] |  |
Contingent consideration |  | 0
SIMOS Insourcing Solutions Corporation | Significant Other Observable Inputs (Level 2) |  |
Fair Value Measurement [Line Items] |  |
Contingent consideration |  | 0
SIMOS Insourcing Solutions Corporation | Significant Unobservable Inputs (Level 3) |  |
Fair Value Measurement [Line Items] |  |
Contingent consideration |  | $ 21,600

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