Condensed Consolidated Statements of Comprehensive Income (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Income Statement [Abstract]
Net sales	$ 98,551	$ 94,279	$ 206,430	$ 190,379
Cost of sales	61,629	60,689	127,649	121,369
Gross profit	36,922	33,590	78,781	69,010
Selling, general and administrative expenses	23,392	20,866	43,234	39,467
Income from operations	13,530	12,724	35,547	29,543
Interest expense, net	210	4,299	461	8,710
Income before income taxes	13,320	8,425	35,086	20,833
Provision for income taxes	96	86	293	182
Net income	13,224	8,339	34,793	20,651
Basic earnings per common share	$ 0.78	$ 0.54	$ 2.05	$ 1.33
Basic weighted average common shares outstanding	17,012,046	15,571,207	16,947,935	15,522,492
Diluted earnings per common share	$ 0.76	$ 0.48	$ 2.01	$ 1.22
Diluted weighted average common shares outstanding	17,392,270	17,210,177	17,336,714	16,964,082
Comprehensive income	$ 13,224	$ 8,339	$ 34,793	$ 20,651