Consolidated Quarterly Data (Tables)

12 Months Ended

Dec. 31, 2012

Quarterly Financial Information Disclosure [Abstract]

Consolidated quarterly data

18. Consolidated Quarterly Data (Unaudited)

	2012
	Q1		Q2		Q3		Q4
Net Sales	$	173,712	$	199,493	$	178,268	$	187,507
Gross Profit	$	75,319	$	88,951	$	77,563	$	83,463
Net Earnings	$	5,324	$	13,671	$	8,745	$	13,844
Basic Earnings per Share	$	0.28	$	0.74	$	0.47	$	0.75
Diluted Earnings per Share	$	0.28	$	0.71	$	0.46	$	0.73

	2011
	Q1		Q2		Q3		Q4
Net Sales	$	172,591	$	201,259	$	186,990	$	193,158
Gross Profit	$	71,931	$	83,468	$	80,253	$	83,529
Net Earnings	$	5,866	$	5,855	$	9,728	$	11,264
Basic Earnings per Share	$	0.31	$	0.31	$	0.52	$	0.60
Diluted Earnings per Share	$	0.30	$	0.30	$	0.50	$	0.59