STOCKHOLDERS' EQUITY - Activity during the period (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 02, 2016	Jul. 04, 2015	Jul. 02, 2016	Jul. 04, 2015
Activity in the Capital in excess of par value, Retained earnings and Common stock in treasury, at cost
Balance at the beginning of the period			$ 245,221
Net income (loss)	$ 26,773	$ 8,541	38,409	$ (46,680)
Balance at the end of the period	307,172	164,014	307,172	164,014
Capital in Excess of Par Value
Activity in the Capital in excess of par value, Retained earnings and Common stock in treasury, at cost
Balance at the beginning of the period			224,677	199,100
Share-based compensation			16,156	12,756
Balance at the end of the period	240,833	211,856	240,833	211,856
Retained Earnings
Activity in the Capital in excess of par value, Retained earnings and Common stock in treasury, at cost
Balance at the beginning of the period			1,155,838	1,145,643
Net income (loss)			38,409	(46,680)
Exercise of stock options			(463)	(1,919)
Restricted shares issued, net of cancellations and shares withheld for taxes			(2,380)	(2,478)
Balance at the end of the period	1,191,404	1,094,566	1,191,404	1,094,566
Treasury Shares
Activity in the Capital in excess of par value, Retained earnings and Common stock in treasury, at cost
Balance at the beginning of the period			(1,281,690)	(1,291,583)
Exercise of stock options			721	4,347
Restricted shares issued, net of cancellations and shares withheld for taxes			1,846	1,321
Balance at the end of the period	$ (1,279,123)	$ (1,285,915)	$ (1,279,123)	$ (1,285,915)