STOCKHOLDERS' EQUITY - Changes to the Unvested Stock Options (Details)	12 Months Ended
	Dec. 29, 2017 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]
Non-vested options, beginning balance | shares	19,800
Non-vested options, granted | shares	0
Non-vested options, vested | shares	(19,800)
Non-vested options, canceled | shares	0
Non-vested options, ending balance | shares	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Non-vested options, weighted average grant date fair value, beginning balance | $ / shares	$ 26.95
Non-vested options, weighted average grant date fair value, granted | $ / shares	0.00
Non-vested options, weighted average grant date fair value, vested | $ / shares	26.95
Non-vested options, weighted average grant date fair value, canceled | $ / shares	0.00
Non-vested options, weighted average grant date fair value, ending balance | $ / shares	$ 0.00
Performance Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Non-vested performance shares, beginning balance | shares	82,800
Non-vested performance shares, granted | shares	37,800
Non-vested performance shares, vested | shares	0
Non-vested performance shares, canceled | shares	0
Non-vested performance shares, ending balance | shares	120,600
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Beginning balance, weighted average grant date value | $ / shares	$ 21.53
Granted, weighted average grant date fair value | $ / shares	87.43
Vested, weighted average grant date fair value | $ / shares	0.00
Canceled, weighted average grant date fair value | $ / shares	0.00
Ending balance, weighted average grant date fair value | $ / shares	$ 42.17