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Fair Value Fair Value (Tables)
 6 Months Ended
Jun. 30, 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 June 30, 2016, and December 31, 2015, (in thousands):
 
 
June 30, 2016
 
December 31, 2015
 
 
Carrying Value
 
Fair Value
 
Difference
 
Carrying Value
 
Fair Value
 
Difference
6.625% senior notes
 
$
292,740

 
$
275,176

 
$
(17,564
)
 
$
292,740

 
$
248,097

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

 
209,675

 
(40,325
)
 
250,000

 
183,125

 
(66,875
)
Total
 
$
542,740

 
$
484,851

 
$
(57,889
)
 
$
542,740

 
$
431,222

 
$
(111,518
)