Organization (Details) (USD $)	12 Months Ended
Dec. 31, 2012
Organization [Abstract]
Litigation Settlement, Gross	$ 180,650,000

This element represents the gross amount awarded, to be received by, or to be remitted to the entity in settlement of litigation occurring during the period.

No definition available.

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