Stock Based Compensation Non Employee Director Stock Option Activity (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Jun. 30, 2010 Employee Stock Option [Member]	Jun. 30, 2009 Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number			80
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price			$ 17,810
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period		(80)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price	$ 27.84	$ 17,810.00