Consolidated Quarterly Data (Tables)

12 Months Ended

Dec. 31, 2011

Consolidated Quarterly Data [Abstract]

Consolidated quarterly data

19.   Consolidated Quarterly Data (Unaudited)

	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

	2010
		Q1		Q2		Q3		Q4
Net Sales	$	150,106	$	166,137	$	168,637	$	182,789
Gross Profit	$	63,760	$	71,543	$	71,862	$	77,162
Net Earnings	$	4,091	$	6,175	$	7,526	$	17,012
Basic Earnings per Share	$	0.22	$	0.33	$	0.40	$	0.91
Diluted Earnings per Share	$	0.21	$	0.32	$	0.39	$	0.89