Restatement of Previously Issued Financial States (Details) (USD $)	3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2012 Impact of errors [Member]	Sep. 30, 2012 Impact of errors [Member]	Dec. 31, 2012 Impact of errors [Member]	Dec. 31, 2011 Impact of errors [Member]	Dec. 31, 2010 Impact of errors [Member]
Balance Sheet [Abstract]
Finished goods inventory							$ 4,060,000	$ 3,050,000
Retained Earnings							2,740,000	2,120,000
Income Statement [Abstract]
Gross profit	45,787,000	47,297,000	159,795,000	159,640,000	80,000	770,000	1,010,000	1,040,000	1,344,000
Net income from continuing operations	$ 6,527,000	$ 6,633,000	$ 30,930,000	$ 28,667,000	$ 50,000	$ 480,000	$ 620,000	$ 650,000	$ 807,000
Earnings per share on net income attributable to controlling interest
Basic (in dollars per share)	$ 0.29	$ 0.29	$ 1.35	$ 1.26		$ 0.02	$ 0.03	$ 0.03	$ 0.04
Diluted (in dollars per share)	$ 0.28	$ 0.29	$ 1.33	$ 1.24		$ 0.02	$ 0.03	$ 0.03	$ 0.04