Long-Term Debt (Details Textual) (USD $)	1 Months Ended	3 Months Ended
	Jan. 31, 2013	Mar. 31, 2013	Jan. 25, 2013	Jan. 17, 2013
Long-Term Debt (Textual) [Abstract]
Interest expense with respect to the senior notes		$ 686,000
Long-Term Debt (Additional Textual) [Abstract]
Aggregate principal amount			5,300,000	35,000,000
Prospectus supplement date		Jan. 10, 2013
Underwriting and issuance costs	1,600,000	1,500,000
Quarterly payments dates, one		January 30
Quarterly payments dates, two		April 30
Quarterly payments dates, three		July 30
Quarterly payments dates, four		October 30
Quarterly payment start date		Apr. 30, 2013
Notes redemption date		Jan. 30, 2016
Redemption price as percentage of principal amount redeemed		100.00%
Amortization of debt issuance costs		33,000
Minimum [Member]
Long-Term Debt (Textual) [Abstract]
Notice period for redemption of Notes		30 days
Maximum [Member]
Long-Term Debt (Textual) [Abstract]
Notice period for redemption of Notes		60 days
Unsecured senior note [Member]
Long-Term Debt (Textual) [Abstract]
Net proceeds after underwriting and issuance costs	38,700,000
Maturity date of notes		Jan. 30, 2020
Fixed annual rate of interest				8.00%
Interest expense with respect to the senior notes		$ 686,000
Effective interest rate		8.70%