EQUITY AND LONG-TERM INCENTIVE COMPENSATION - Narrative (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019
Income Per Share
Weighted-average number of common shares used in basic income per share (in shares)	44,708	44,072	44,538	43,870
Dilutive securities — Employee stock options, restricted stock shares and restricted stock units (in shares)	1,186	1,104	1,156	991
Weighted-average number of common shares and dilutive securities used in diluted income per share (in shares)	45,894	45,176	45,694	44,861
Restricted stock shares/units
Stock-based Compensation
Number of options or units that were excluded from the computation of diluted income per share	352	369	346	373
Employee stock option
Stock-based Compensation
Number of options or units that were excluded from the computation of diluted income per share	858	909	817	961