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FAIR VALUE MEASUREMENTS FAIR VALUE MEASUREMENTS (Borrowings) (Details) - USD ($) | Jul. 19, 2017 | Jul. 01, 2017 | Dec. 31, 2016 | Jul. 02, 2016
--- | --- | --- | --- | ---
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |
Long-term debt |  | $ 661,846,000 | $ 580,376,000 | $ 580,678,000
Maximum borrowing capacity |  | 500,000,000 |  |
Secured revolving credit facility [Member] |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |
Long-term debt |  | 266,000,000 | 184,977,000 | 185,714,000
Maximum borrowing capacity |  | 100,000,000 |  |
Senior Notes [Member] |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |
Long-term debt |  | 400,000,000 | $ 400,000,000 | $ 400,000,000
Debt Instrument, face amount |  | 400,000,000 |  |
Fair Value [Member] | Fair Value, Inputs, Level 2 [Member] | Senior Notes [Member] |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |
Long-term debt |  | $ 412,000,000 |  |
Secured revolving credit facility [Member] | Subsequent Event [Member] |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |
Long-term debt | $ 366,000,000 |  |  |
Maximum borrowing capacity | 100,000,000 |  |  |
Outstanding borrowings | $ 366,000,000 |  |  |

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