Sale and Leaseback Transaction (Details) (USD $)	1 Months Ended	3 Months Ended	6 Months Ended
	Jun. 30, 2012	Mar. 31, 2012	Jun. 30, 2012	Feb. 22, 2012	Aug. 28, 2007
Sale and Leaseback Transaction [Abstract]
Gross proceeds		$ 59,000,000
Repayments of debt from proceeds of sale and leaseback transaction		54,500,000
Lease term		10 years
Deferred gain on sale				14,900,000	1,400,000
Net gain due to early buy-out	430,000		430,000
Unrecognized gain from 2007 sale leaseback transaction			710,000
Sale Leaseback Transaction, Other Payments Required	$ 280,000