Senior Notes Payable (Details) (USD $)	9 Months Ended
	Sep. 30, 2012	Aug. 31, 2012
Senior Notes Payable (Textual) [Abstract]
Senior notes payable	$ 86,250,000	$ 86,250,000
Senior notes issued percentage		7.75%
Senior notes issue price		100.00%
Net proceeds	83,228,000
Net proceeds after deductions	$ 3,022,000
Notes maturity date	Aug. 15, 2022
Notes interest rate	7.75%
Redemption price of notes	100.00%
Percentage of ownership of subsidiary	100.00%