CONSOLIDATED CONDENSED STATEMENTS OF EARNINGS AND COMPREHENSIVE INCOME (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 26, 2011
CONSOLIDATED CONDENSED STATEMENTS OF EARNINGS AND COMPREHENSIVE INCOME (Unaudited) [Abstract]
NET SALES	$ 457,111	$ 387,233
COST OF GOODS SOLD	403,445	345,819
GROSS PROFIT	53,666	41,414
SELLING, GENERAL AND ADMINISTRATIVE EXPENSES	45,778	46,488
NET LOSS ON DISPOSITION OF ASSETS,EARLY RETIREMENT, AND OTHER IMPAIRMENT AND EXIT CHARGES	95	7
EARNINGS (LOSS) FROM OPERATIONS	7,793	(5,081)
INTEREST EXPENSE	1,011	883
INTEREST INCOME	(241)	(248)
Equity in earnings of investee	(62)	(17)
NON-OPERATING (INCOME) EXPENSE	708	618
EARNINGS (LOSS) BEFORE INCOME TAXES	7,085	(5,699)
INCOME TAXES (BENEFIT)	2,699	(2,287)
NET EARNINGS (LOSS)	4,386	(3,412)
LESS NET EARNINGS ATTRIBUTABLE TO NONCONTROLLING INTEREST	(231)	(258)
NET EARNINGS (LOSS) ATTRIBUTABLE TO CONTROLLING INTEREST	4,155	(3,670)
EARNINGS (LOSS) PER SHARE - BASIC (in dollars per share)	$ 0.21	$ (0.19)
EARNINGS (LOSS) PER SHARE - DILUTED (in dollars per share)	$ 0.21	$ (0.19)
WEIGHTED AVERAGE SHARES OUTSTANDING (in shares)	19,569	19,306
WEIGHTED AVERAGE SHARES OUTSTANDING WITH COMMON STOCK EQUIVALENTS (in shares)	19,700	19,306
COMPREHENSIVE INCOME (LOSS)	5,444	(2,702)
LESS COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTEREST	(655)	(429)
COMPREHENSIVE INCOME (LOSS)ATTRIBUTABLE TO CONTROLLING INTEREST	$ 4,789	$ (3,131)