INCOME PER COMMON SHARE (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Apr. 01, 2012
INCOME PER COMMON SHARE [Abstract]
Net income for basic and diluted per share calculation	$ 6,019	$ 5,011
Weighted average shares outstanding - basic (in shares)	10,904	10,219
Effect of potentially dilutive securities (in shares)	81	488
Weighted average shares outstanding - diluted (in shares)	10,985	10,707
Basic net income per share (in dollars per share)	$ 0.55	$ 0.49
Diluted net income per share (in dollars per share)	$ 0.55	$ 0.47