Fair Value Measurements (Details 1) (Green Bay Option [Member], USD $) In Thousands, unless otherwise specified	9 Months Ended
Sep. 30, 2012
Green Bay Option [Member]
Schedule of components of the change in fair value associated with Green Bay Option
Fair value balance at January 1, 2012	$ (11,398)
Add: Mark to market fair value adjustment	(624)
Fair value balance at September 30, 2012	$ (12,022)

Adjustment to the amount at which a liability incurred or settled in a current transaction between willing parties, that is, other than in a forced or liquidation sale.

No definition available.

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