Goodwill Goodwill Narrative (Details) (USD $)							1 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2013 Customer contracts and relationships [Member]	Dec. 31, 2012 Customer contracts and relationships [Member]	May 01, 2012 Customer Relationship Associated with Error Adjustment - Balance Prior to Correction of Error [Member]	Jun. 30, 2013 Customer Relationship Associated with Error Adjustment - Balance Subsequent to Correction of Error [Member]	May 31, 2013 Forward Loss Recognized Resulting from Inclusion of Certain Internal Costs not Originally Reflected [Member]
Goodwill [Line Items]
Loss on Contracts							$ 2,400,000
Finite-Lived Intangible Assets, Gross	$ 784,146,000	$ 783,140,000	$ 281,644,000	$ 292,252,000	$ 1,500,000	$ 0