Redeemable Preferred Stock (Details Textual)	9 Months Ended	12 Months Ended
Sep. 30, 2012	Dec. 31, 2011
Redeemable Preferred Stock (Textual) [Abstract]
No Of Outstanding Preferred Stock Consider for Participating Securities	7.00%	7.00%

The percentage rate used to calculate dividend payments on preferred stock.

No definition available.

Name:	us-gaap_PreferredStockDividendRatePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration