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Fair Value Measurements (Tables)
 12 Months Ended
Dec. 31, 2016
Fair Value, Inputs, Level 1  
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Fair Value, Liabilities Measured on Recurring and Nonrecurring Basis
The following tables present certain information for our financial assets that is measured at fair value on a recurring basis at December 31:
 
Level 1 2016
 
Level 1 2015
  
Carrying Amount
 
Fair Value
 
Carrying Amount
 
Fair Value
Liabilities:
  

 
  

 
  

 
  

6.50% Senior Notes due 2024
900,000

 
812,250

 
—

 
—

6.75% Senior Notes due 2020
—

 
—

 
740,838

 
765,319
Fair Value, Inputs, Level 3  
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Fair Value, Liabilities Measured on Recurring and Nonrecurring Basis
The following table presents changes in deferred acquisition consideration for the years ended December 31:
 
Fair Value Measurements Using
Significant Unobservable Inputs
(Level 3)
  
2016
 
2015
Beginning balance of contingent payments
$
306,734

 
$
172,227

Payments (1)
(105,169
)
 
(77,301
)
Additions (2)
16,132

 
174,530

Redemption value adjustments (3)
13,930

 
41,636

Other (4)
(6,412
)
 
—

Foreign translation adjustment
(461
)
 
(4,358
)
Ending balance of contingent payments
$
224,754

 
$
306,734