Long-Term Debt and Short-Term Debt (Details Textual) (USD $)	3 Months Ended					3 Months Ended
	Mar. 31, 2013	Mar. 31, 2013 April 26, 2014 [Member]	Dec. 31, 2012 April 26, 2014 [Member]	Mar. 31, 2013 December 20, 2018 [Member]	Dec. 31, 2012 December 20, 2018 [Member]	Mar. 31, 2013 Revolving credit facility [Member]	Oct. 26, 2012 Revolving credit facility [Member]	Mar. 31, 2013 Fixed rate notes [Member]	Mar. 31, 2013 Fixed rate notes [Member] April 26, 2014 [Member]	Mar. 31, 2013 Maximum [Member]	Mar. 31, 2013 Maximum [Member] Revolving credit facility [Member]	Mar. 31, 2013 Maximum [Member] Seven year fixed rate notes [Member] October 26th Fixed rate debt [Member]	Mar. 31, 2013 Minimum [Member]	Mar. 31, 2013 Minimum [Member] October 26th Fixed rate debt [Member]	Mar. 31, 2013 Minimum [Member] Revolving credit facility [Member]
Line of Credit Facility [Line Items]
Borrowings							$ 100,000,000
Applicable margin added to the interest rate										3.50%			2.50%
Applicable margin added to the interest rate post amendment						1.50%					2.25%				1.25%
Fixed rate notes payable								40,000,000
Other notes payable	11,429,000	11,429,000	11,429,000
Notes Payable				20,000,000	20,000,000
Unamortized balance						1,915,000		117,000
Percentage of fixed interest rate bearing				4.64%					4.89%
Percentage of fixed interest rate bearing pre amendment														5.39%
Percentage of fixed interest rate bearing post amendment												4.89%
Line of credit LIBOR rate						0.25%
Annual principal payment of fixed rate notes				4,000,000					5,714,000
Long-Term Debt and Short-Term Debt (Textual) [Abstract]
Fixed charge coverage ratio current required minimum	1.00
Potential to expand credit facility under credit agreement	35,000,000
Amount of credit facility to meet short term cash flow needs	$ 10,000,000
Method of determining interest rate under revolving credit facility	LIBOR plus an applicable margin