EARNINGS PER SHARE (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 29, 2013	Jun. 30, 2012	Jun. 29, 2013	Jun. 30, 2012
Numerator:
Net income	$ 32,308	$ 18,014	$ 56,026	$ 33,494
Denominator:
Weighted average number of common shares outstanding - Basic	19,333,589	19,155,127	19,308,066	19,135,946
Dilutive effect of options and restricted stock units outstanding under the Company's employee compensation plans	514,841	528,152	506,494	490,875
Weighted average number of common shares outstanding - Diluted	19,848,430	19,683,279	19,814,560	19,626,821