EARNINGS PER SHARE (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012
Numerator [Abstract]
Net earnings attributable to controlling interest	$ 14,091	$ 4,198	$ 35,087	$ 25,862
Adjustment for earnings allocated to non-vested restricted common stock	(134)	(38)	(338)	(225)
Net earnings for calculating EPS	$ 13,957	$ 4,160	$ 34,749	$ 25,637
Denominator [Abstract]
Weighted average shares outstanding (in shares)	19,965,000	19,827,000	19,916,000	19,783,000
Adjustment for non-vested restricted common stock (in shares)	(190,000)	(178,000)	(192,000)	(172,000)
Shares for calculating basic EPS (in shares)	19,775,000	19,649,000	19,724,000	19,611,000
Effect of dilutive stock options (in shares)	25,000	25,000	39,000	19,000
Shares for calculating diluted EPS (in shares)	19,800,000	19,674,000	19,763,000	19,630,000
Net earnings per share [Abstract]
Basic (in dollars per share)	$ 0.71	$ 0.21	$ 1.76	$ 1.31
Diluted (in dollars per share)	$ 0.71	$ 0.21	$ 1.76	$ 1.31
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Options to purchase shares excluded from computation of EPS (in shares)	0	0		10,000