Extinguishment of Senior Notes (Details Textual) (USD $)	1 Months Ended	3 Months Ended
	Jan. 31, 2012	Mar. 31, 2012
Extinguishment of Senior Notes (Textual) [Abstract]
Redeemed principle amount of senior notes	$ 61,800,000
Percentage of senior note redeemed	8.625%
Senior notes due date	2014
Total consideration on redemption of senior notes	62,700,000
Accrued interest on redemption	1,800,000
Loss on extinguishment of debt	1,500,000
Unamortized debt issuance costs	$ 594,000	$ 594,000