SHARE-BASED COMPENSATION (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended	18 Months Ended
	Jul. 04, 2015	Jul. 05, 2014	Jul. 04, 2015	Jul. 05, 2014	Jan. 03, 2015	Jul. 04, 2015
SHARE-BASED COMPENSATION
Share-based compensation expense	$ 6,800	$ 5,800	$ 12,800	$ 26,000
Share-based compensation	$ 6,753	5,808	12,756	26,032
Payroll and Related Costs and Spending
SHARE-BASED COMPENSATION
Share-based compensation expense		600	200	16,900
Share-based compensation		$ 600	$ 200	$ 16,900
Stock options
SHARE-BASED COMPENSATION
Vesting period			3 years
Valuation Assumptions:
Weighted-average fair value of options granted (in dollars per share)			$ 15.92
Historic volatility (as a percent)			76.50%
Weighted-average volatility (as a percent)			58.70%
Expected term (in years)			4 years 2 months 12 days
Risk-free rate (as a percent)			1.90%
Expected annual forfeiture (as a percent)			15.30%
Shares
Outstanding at the beginning of the period (in shares)			1,030,969
Granted			174,458
Exercised (in shares)			(233,000)
Outstanding at end of the period (in shares)	972,427		972,427		1,030,969	972,427
Vested or expected to vest at the end of the period (in shares)	926,408		926,408			926,408
Exercisable at the end of the period (in shares)	636,717		636,717			636,717
Weighted Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)			$ 11.25
Granted (in dollars per share)			34.29
Exercised (in dollars per share)			10.42
Outstanding at the end of the period (in dollars per share)	$ 15.58		15.58		$ 11.25	$ 15.58
Vested or expected to vest at the end of the period (in dollars per share)	14.72		14.72			14.72
Exercisable at the end of the period (in dollars per share)	$ 9.08		$ 9.08			$ 9.08
Weighted Average Remaining Contractual Term
SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2			4 years		3 years 10 months 24 days
SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2			4 years		3 years 10 months 24 days
Vested or expected to vest at the end of the period			3 years 9 months 18 days
Exercisable at the end of the period			3 years
Aggregate Intrinsic Value
Outstanding at the beginning of the period (in dollars)			$ 21,613
Exercised (in dollars)			5,659
Outstanding at the end of the period (in dollars)	$ 7,966		7,966		$ 21,613	$ 7,966
Vested or expected to vest at the end of the period (in dollars)	7,962		7,962			7,962
Exercisable at the end of the period (in dollars)	$ 7,889		$ 7,889			$ 7,889
Additional disclosure
Nonvested stock options outstanding (in shares)	300,000		300,000			300,000
Weighted average grant date fair value per award for nonvested stock options (in dollars per share)	$ 13.23		$ 13.23			$ 13.23
Total unrecognized compensation cost related to nonvested stock options granted	$ 2,800		$ 2,800			$ 2,800
Weighted average recognition period of unrecognized stock-based compensation expense			1 year 9 months 18 days
Fair value of shares vested under stock option plans						$ 2,300
Stock options | Minimum
SHARE-BASED COMPENSATION
Contractual term			7 years
Stock options | Maximum
SHARE-BASED COMPENSATION
Contractual term			10 years