Quarterly Financial Data (Tables)

12 Months Ended

Dec. 31, 2015

Quarterly Financial Data [Abstract]

Schedule Of Quarterly Financial Information

			2015 Quarter
(in thousands, except per share data)			1st		2nd		3rd		4th
Sales		$	620,925	$	664,038	$	630,191	$	625,719
Gross profit			51,779		55,716		54,284		56,795
Net income			14,205		21,210		20,565		39,421
Earnings per common share:
	Basic		0.27		0.41		0.40		0.78
	Diluted		0.27		0.40		0.40		0.77
			2014 Quarter
(in thousands, except per share data)			1st		2nd		3rd		4th
Sales		$	639,344	$	716,868	$	731,302	$	709,547
Gross profit			51,123		57,751		55,294		55,689
Net income			19,439		21,558		16,906		23,338
Earnings per common share:
	Basic		0.36		0.40		0.32		0.44
	Diluted		0.36		0.40		0.31		0.44
			2013 Quarter
(in thousands, except per share data)			1st		2nd		3rd		4th
Sales		$	542,444	$	607,522	$	599,658	$	756,843
Gross profit			36,834		44,367		45,440		59,843
Net income			11,331		8,256		23,648		67,710
Earnings per common share:
	Basic		0.21		0.15		0.44		1.26
	Diluted		0.21		0.15		0.43		1.25