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Fair Value Measurements (Tables)
9 Months Ended
Sep. 30, 2014
Fair Value Disclosures [Abstract]  
Carrying value and fair value of variable rate long-term debt
The following table reflects the carrying value and fair value of our variable-rate long-term debt (in thousands):

 
As of September 30, 2014
 
As of December 31, 2013
 
Carrying
Value
 
Fair
Value
 
Carrying
Value
 
Fair
Value
Variable-rate long-term debt
$
600,000

 
$
600,000

 
$
556,914

 
$
556,914