FAIR VALUE MEASUREMENT (Details) - USD ($) $ in Thousands	Apr. 02, 2017	Jan. 01, 2017
Fair Value Measurement [Line Items]
Other restricted assets	$ 18,717	$ 16,925
Restricted investments classified as held-to-maturity	155,687	145,953
Contingent consideration	22,100	21,600
Total Fair Value
Fair Value Measurement [Line Items]
Cash and cash equivalents	26,083	34,970
Total Fair Value \| Restricted Assets
Fair Value Measurement [Line Items]
Restricted cash and cash equivalents	54,105	67,751
Other restricted assets	18,717	16,925
Restricted investments classified as held-to-maturity	155,687	145,953
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value Measurement [Line Items]
Cash and cash equivalents	26,083	34,970
Contingent consideration	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Restricted Assets
Fair Value Measurement [Line Items]
Restricted cash and cash equivalents	54,105	67,751
Other restricted assets	18,717
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
Contingent consideration	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	155,687	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
Fair Value Measurement [Line Items]
Contingent consideration	22,100
SIMOS Insourcing Solutions Corporation \| Total Fair Value
Fair Value Measurement [Line Items]
Contingent consideration	22,100	21,600
SIMOS Insourcing Solutions Corporation \| Significant Unobservable Inputs (Level 3)
Fair Value Measurement [Line Items]
Contingent consideration	$ 22,100	$ 21,600

Amount of liability recognized arising from contingent consideration in a business combination.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Fair value of investments in debt securities classified as held-to-maturity.

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