Debt (Details Textual) (USD $)	12 Months Ended						12 Months Ended		12 Months Ended		12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Unused lines of Credit [Member]	Dec. 31, 2012 Maximum [Member]	Dec. 31, 2012 Minimum [Member]	Dec. 31, 2012 Sun Trust Revolving Credit Facility [Member]	Jan. 19, 2010 Sun Trust Revolving Credit Facility [Member]	Dec. 31, 2012 Sun Trust Term Loan [Member]	Jan. 19, 2010 Sun Trust Term Loan [Member]	Dec. 31, 2012 SunTrust Bank [Member]
Line of Credit Facility [Line Items]
Four-year revolving credit & Term Loan agreement							Jan. 19, 2010
Period of term loan and the revolving credit facility											4 years
First payment on the term loan									Mar. 31, 2010
Committed revolving credit facility				$ 15,000,000				$ 15,000,000
Committed term loan										15,000,000
Revolving credit facility outstanding							0		14,100,000
Term loan requires quarterly principal payments									800,000
Frequency of payment of interest									Quarterly		Monthly
Term loan final principal payment									3,000,000
SunTrust term loan, Line of credit facility, frequency of payment											Quarterly
Index rate used as reference for interest rate on revolver and term loan											One-month LIBOR rate
Applicable interest rate margin					3.50%	2.25%					2.50%
Revolving Credit facility and Term Loan interest rate											2.71%
Weighted-average interest rate on term loan credit facility							3.80%
Loss on debt extinguishment			(1,381,000)						1,400,000
Revolving credit and term loan availability under SunTrust revolver							$ 8,100,000
Long-Term Debt (Textual) [Abstract]
Revolving Credit facility commitment fee	0.50%