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FAIR VALUE MEASUREMENT (Details) - USD ($) $ in Thousands | Apr. 01, 2018 | Dec. 31, 2017 | Apr. 02, 2017 | Jan. 01, 2017
--- | --- | --- | --- | ---
Fair Value Measurement [Line Items] |  |  |  |
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents | $ 79,054 | $ 73,831 | $ 80,439 | $ 103,222
Deferred compensation mutual funds | 24,093 | 22,428 |  |
Restricted investments classified as held-to-maturity | 164,446 | 172,238 |  |
Total Fair Value |  |  |  |
Fair Value Measurement [Line Items] |  |  |  |
Cash and cash equivalents | 26,636 | 28,780 |  |
Total Fair Value | Restricted Assets |  |  |  |
Fair Value Measurement [Line Items] |  |  |  |
Restricted cash and cash equivalents | 52,418 | 45,051 |  |
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents | 79,054 | 73,831 |  |
Deferred compensation mutual funds | 24,093 | 22,428 |  |
Restricted investments classified as held-to-maturity | 164,446 | 172,238 |  |
Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |  |
Fair Value Measurement [Line Items] |  |  |  |
Cash and cash equivalents | 26,636 | 28,780 |  |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Restricted Assets |  |  |  |
Fair Value Measurement [Line Items] |  |  |  |
Restricted cash and cash equivalents | 52,418 | 45,051 |  |
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents | 79,054 | 73,831 |  |
Deferred compensation mutual funds | 24,093 | 22,428 |  |
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 |  |
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents | 0 | 0 |  |
Deferred compensation mutual funds | 0 | 0 |  |
Restricted investments classified as held-to-maturity | 164,446 | 172,238 |  |
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 |  |
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents | 0 | 0 |  |
Deferred compensation mutual funds | 0 | 0 |  |
Restricted investments classified as held-to-maturity | $ 0 | $ 0 |  |

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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 + Details
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- Definition Carrying amount as of the balance sheet date of assets held under deferred compensation agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Fair value of investments in debt securities classified as held-to-maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27232-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27232-111563 + Details
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- Definition The carrying amounts of cash and cash equivalent items which are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. This element is for unclassified presentations; for classified presentations there is a separate and distinct element. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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