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Fair Value Fair Value (Tables)
 3 Months Ended
Mar. 31, 2016
Fair Value Disclosures [Abstract]  
Fair Value Measurements, Nonrecurring
The fair value of our senior notes is based on Level 1 inputs and was as follows at March 31, 2016, and December 31, 2015, (in thousands):
 
 
March 31, 2016
 
December 31, 2015
 
 
Carrying Value
 
Fair Value
 
Difference
 
Carrying Value
 
Fair Value
 
Difference
6.625% senior notes
 
$
292,740

 
$
254,684

 
$
(38,056
)
 
$
292,740

 
$
248,097

 
$
(44,643
)
4.75% senior notes
 
250,000

 
188,750

 
(61,250
)
 
250,000

 
183,125

 
(66,875
)
Total
 
$
542,740

 
$
443,434

 
$
(99,306
)
 
$
542,740

 
$
431,222

 
$
(111,518
)