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Fair Value Measurements (Reconciliation of Fair Value Measurements of Assets and Liabilities Utilizing Level 3 Inputs) (Details) (Level 3 [Member], USD $)
In Thousands, unless otherwise specified
9 Months Ended
Sep. 30, 2014
Level 3 [Member]
 
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Fair value as of December 31, 2013 $ 29,025
Payments (10,795)
Additions 44,525
Gains recognized in earnings, net (1,289)
Fair value as of June 30, 2014 $ 61,466