Litigation and Other Contingencies (Details)	1 Months Ended
Sep. 30, 2010 individual
Serrano lawsuit
Loss Contingencies [Line Items]
Number of plaintiffs (individual)	13

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_LossContingenciesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration