Subsequent Event (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended	0 Months Ended
Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Oct. 16, 2012 Subsequent Event [Member] Pending Litigation [Member]
Subsequent Event [Line Items]
Litigation Settlement, Gross	$ (5,000)	$ 0	$ (5,000)	$ 0	$ 5,000

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