Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements (Fair Value Of Assets And Liabilities) (Details)

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Fair Value Measurements (Fair Value Of Assets And Liabilities) (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Jun. 30, 2012
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]      
Term loan, carrying value $ 246,875 $ 250,000  
Senior notes, carrying value 0 0 240,000
Level 1 [Member]
     
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]      
Term loan, fair value 0 0  
Senior notes, fair value     255,000
Level 2 [Member]
     
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]      
Term loan, fair value 246,875 250,000  
Senior notes, fair value     0
Level 3 [Member]
     
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]      
Term loan, fair value 0 0  
Senior notes, fair value     $ 0