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Fair Value Measurements (Tables)
6 Months Ended
Jun. 30, 2017
Fair Value Disclosures [Abstract]  
Schedule of Carrying Values and Estimated Fair Values of Debt Instruments
A summary of the aggregate carrying values and fair values of our long-term fixed interest rate debt is as follows (in thousands):
 
 
June 30, 2017
 
December 31, 2016
Carrying value
 
$
370,768

 
$
286,660

Fair value
 
368,142

 
293,522