BASIS OF PRESENTATION (Details) $ / shares in Units, $ in Thousands				3 Months Ended		9 Months Ended		12 Months Ended
	Jul. 21, 2016 USD ($)	Jul. 20, 2016 USD ($) $ / shares shares	Jun. 21, 2016	Oct. 01, 2016	Oct. 03, 2015	Oct. 01, 2016	Oct. 03, 2015	Dec. 31, 2016	Jan. 02, 2016
Fiscal period duration				91 days	91 days	273 days	273 days		364 days
Stock split			49.313
2016 First Lien Term Loan
Early Repayment of Senior Debt | $	$ 205,000
Selling Shareholders
Issuance of stock (in shares)		10,300,000
Forecast
Fiscal period duration								364 days
IPO
Total number of shares issued (in shares)		21,390,000
Number of common stock initially offered (in shares)		18,600,000
Issuance of stock (in shares)		11,090,000
Shares Issued, Price Per Share | $ / shares		$ 21.00
Net proceeds from initial public offering | $		$ 207,451
IPO | Oaktree | Other Expense
Public offering fee | $		$ 9,000
Underwriting | Selling Shareholders
Issuance of stock (in shares)		2,790,000
Minimum
Fiscal period duration						364 days
Maximum
Fiscal period duration						371 days