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
 3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Dec. 31, 2014
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]          
Interest Rate Derivative Liabilities, at Fair Value $ 949   $ 949    
Asset impairment 5,000 $ 0 5,000 $ 0  
Level 1 [Member]          
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]          
Interest Rate Derivative Liabilities, at Fair Value 0   0    
Level 2 [Member]          
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]          
Interest Rate Derivative Liabilities, at Fair Value 949   949    
Level 3 [Member]          
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]          
Interest Rate Derivative Liabilities, at Fair Value 0   0    
Term Loan [Member]          
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]          
Term loan, carrying value 500,000 231,250 500,000 231,250 $ 228,126
Term loan, fair value 500,000 231,250 500,000 231,250 228,126
Term Loan [Member] | Level 1 [Member]          
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]          
Term loan, fair value 0 0 0 0 0
Term Loan [Member] | Level 2 [Member]          
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]          
Term loan, fair value 500,000 231,250 500,000 231,250 228,126
Term Loan [Member] | Level 3 [Member]          
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]          
Term loan, fair value 0 $ 0 0 $ 0 $ 0
Revolving Credit Facility [Member]          
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]          
Term loan, carrying value 200,000   200,000    
Term loan, fair value 200,000   200,000    
Revolving Credit Facility [Member] | Level 1 [Member]          
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]          
Term loan, fair value 0   0    
Revolving Credit Facility [Member] | Level 2 [Member]          
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]          
Term loan, fair value 200,000   200,000    
Revolving Credit Facility [Member] | Level 3 [Member]          
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]          
Term loan, fair value $ 0   $ 0