Quarterly Results of Operations Quarterly Results of Operations (Tables)

12 Months Ended

Dec. 31, 2013

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 2013 and 2012.

	Fiscal 2013, Three Months Ended
	Mar 30			Jun 29		Sept 28		Dec 31
Revenues	$	143,265		$	195,638	$	194,772	$	180,173
Gross profit (revenues less costs and expenses, operating)	42,205			76,046		69,114		63,837
Income (loss) from operations	(6,009		)	23,230		14,881		8,687
Net income (loss)	(4,612		)	13,436		8,644		5,385
Net income (loss) per share--Basic	$	(.33	)	$	.97	$	.63	$	.34
Net income (loss) per share -- Diluted:	$	(.33	)	$	.94	$	.61	$	.35
ESOT Valuation per share	$	23.20		$	23.20	$	23.90	$	26.40

	Fiscal 2012, Three Months Ended
	March 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		65,578
Income (loss) from operations	508			17,270		14,652		13,337
Net income (loss)	(571		)	9,416		8,296		7,454
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
Fourth quarters 2013 and 2012 include a decrease in casualty insurance expense that had the effect of increasing the fourth quarter gross profit for 2013 and 2012 by approximately $5,402 and $5,136, respectively.