Quarterly Results of Operations Quarterly Results of Operations (Tables)

12 Months Ended

Dec. 31, 2018

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 2018 and 2017. We have given retroactive consideration to the two-for-one stock split of our common shares effective June 1, 2017.

	Fiscal 2018, Three Months Ended
	Mar 31			Jun 30		Sep 29		Dec 31
Revenues	$	208,651		$	270,649	$	265,318	$	280,173
Gross profit (revenues less costs and expenses, operating)	64,028			102,967		94,193		98,215
Income (loss) from operations	(5,666		)	29,800		14,585		16,971
Net income (loss)	(6,627		)	21,714		8,384		4,506
Net income (loss) per share -- Basic	$	(.26	)	$	.94	$	.35	$	.12
Net income (loss) per share -- Diluted	$	(.26	)	$	.89	$	.34	$	.13
ESOT valuation per share	$	19.10		$	19.70	$	19.70	$	21.10

	Fiscal 2017, Three Months Ended
	Apr 1			Jul 1		Sep 30		Dec 31
Revenues	$	192,813		$	245,037	$	249,588	$	228,520
Gross profit (revenues less costs and expenses, operating)	59,154			93,512		91,973		83,986
Income (loss) from operations	(3,995		)	25,659		19,049		11,478
Net income (loss)	(3,887		)	14,223		10,237		1,547
Net income (loss) per share -- Basic	$	(.15	)	$	.57	$	.41	$	.04
Net income (loss) per share -- Diluted	$	(.15	)	$	.55	$	.39	$	.04
ESOT valuation per share	$	17.60		$	18.30	$	18.30	$	19.10
Fourth quarters of 2018 and 2017 include adjustments to casualty insurance expense that had the effect of decreasing gross profit in 2018 by $7,324 and increasing gross profit in 2017 by $2,735.