Condensed Consolidated Statements of Comprehensive Income (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Income Statement [Abstract]
Net sales	$ 100,645	$ 107,880
Cost of sales	62,478	66,020
Gross profit	38,167	41,860
Selling, general and administrative expenses	18,222	19,842
Income from operations	19,945	22,018
Interest expense, net	323	251
Income before income taxes	19,622	21,767
Provision for income taxes	7,327	198
Net income	12,295	21,569
Basic earnings per common share	$ 0.74	$ 1.28
Basic weighted average common shares outstanding	16,564,338	16,883,111
Diluted earnings per common share	$ 0.73	$ 1.25
Diluted weighted average common shares outstanding	16,799,719	17,280,445
Comprehensive income	$ 12,295	$ 21,569