Litigation (Details Textual) (USD $)	1 Months Ended
Dec. 31, 2010	Mar. 31, 2011 Pending Litigation [Member]	Dec. 31, 2010 Each Cause Of Actions [Member]
Litigation Settlement, Gross	$ 9,000,000	$ 150,000	$ 1,000,000

Amount of judgment or settlement awarded to (against) the entity in respect of litigation.

No definition available.

Name:	us-gaap_LitigationSettlementAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration