Quarterly Financial Data (Tables)

12 Months Ended

Dec. 31, 2012

Quarterly Financial Data [Abstract]

Schedule Of Quarterly Financial Information

	2012 Quarter
(in thousands, except per share data)	1st		2nd		3rd		4th
Sales	$	593,417	$	630,031	$	610,769	$	633,933
Gross profit		40,508		45,991		44,780		45,459
Net income		5,598		13,580		19,314		18,115
Earnings per common share:
Basic		0.10		0.24		0.35		0.33
Diluted		0.10		0.24		0.34		0.33

	2011 Quarter
(in thousands, except per share data)	1st		2nd		3rd		4th
Sales	$	538,312	$	585,549	$	570,083	$	559,086
Gross profit		37,624		37,751		34,635		28,825
Net income		14,513		14,701		19,867		2,878
Earnings per common share:
Basic		0.24		0.24		0.34		0.05
Diluted		0.24		0.24		0.34		0.05

	2010 Quarter
(in thousands, except per share data)	1st		2nd		3rd		4th
Sales	$	571,905	$	589,449	$	613,864	$	626,925
Gross profit		45,237		46,254		47,192		48,732
Net income		18,142		20,137		22,469		19,010
Earnings per common share:
Basic		0.29		0.32		0.36		0.31
Diluted		0.28		0.32		0.36		0.31