Quarterly Results of Operations Quarterly Results of Operations (Tables)

12 Months Ended

Dec. 31, 2012

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information [Table Text Block]

The following is a summary of the results of operations for each quarter of 2012 and 2011.

	Fiscal 2012, Three Months Ended
	Mar 31			Jun 30		Sept 29		Dec 31
Revenues	$	146,644		$	182,411	$	178,647	$	172,451
Gross profit (revenues less costs and expenses, operating)	46,760			65,939		64,544		65,577
Income (loss) from operations	508			17,270		14,652		13,337
Net income (loss)	(803		)	9,416		13,418		2,564
Net income (loss) per share--Basic	$	(.04	)	$	.68	$	.59	$	.51
Net income (loss) per share -- Diluted:	$	(.04	)	$	.66	$	.56	$	.50
ESOT Valuation per share	$	19.70		$	19.70	$	20.80	$	23.20

	Fiscal 2011, Three Months Ended
	Apr 2			Jul 2		Oct 1		Dec 31
Revenues	$	131,324		$	173,953	$	178,799	$	161,958
Gross profit (revenues less costs and expenses, operating)	35,494			62,711		62,642		58,561
Income (loss) from operations	(8,220		)	16,567		13,342		11,112
Net income (loss)	(6,046		)	9,159		6,962		3,990
Net income (loss) per share -- Basic	$	(.43	)	$	.65	$	.50	$	.28
Net income (loss) per share -- Diluted	$	(.43	)	$	.63	$	.49	$	.28
ESOT Valuation per share	$	18.40		$	18.40	$	18.00	$	19.70
Fourth quarters 2012 and 2011 include a decrease in casualty insurance expense that had the effect of increasing the fourth quarter gross profit for 2012 and 2011 by approximately $5,136 and $5,737, respectively.
Fourth quarter 2011 includes a litigation settlement of $2,900 and a writedown of $366 to reduce the carrying value of a cost-method affiliate that experienced an other-than-temporary impairment.