Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Statement [Abstract]
Sales	$ 78,260	$ 96,721	$ 237,819	$ 300,481
Cost of sales	62,129	75,644	187,029	235,261
Gross profit	16,131	21,077	50,790	65,220
Operating expenses:
Salaries and commissions	7,311	7,656	21,717	23,840
Other operating expenses	6,300	6,702	18,629	19,922
Depreciation and amortization	$ 737	$ 739	2,175	$ 2,242
Impairment charge			2,994
Total operating expenses	$ 14,348	$ 15,097	45,515	$ 46,004
Operating income	1,783	5,980	5,275	19,216
Interest expense	237	253	719	866
Income before income taxes	1,546	5,727	4,556	18,350
Income taxes	870	2,199	2,313	7,046
Net income	$ 676	$ 3,528	$ 2,243	$ 11,304
Earnings per share:
Basic (in dollars per share)	$ 0.04	$ 0.20	$ 0.13	$ 0.64
Diluted (in dollars per share)	$ 0.04	$ 0.20	$ 0.13	$ 0.64
Weighted average common shares outstanding:
Basic (in shares)	17,017,334	17,520,810	17,137,730	17,672,010
Diluted (in shares)	17,072,128	17,608,402	17,190,664	17,749,708
Dividend declared per share (in dollars per share)	$ 0.12	$ 0.12	$ 0.36	$ 0.35