Business Segments (Details)	9 Months Ended	12 Months Ended
Sep. 30, 2012 Segments	Dec. 31, 2011 Segments
Business Segments (Textual) [Abstract]
Number of reportable segments in which business operates	1	2

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

No definition available.

Name:	us-gaap_NumberOfReportableSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration