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FAIR VALUE DISCLOSURES (Tables)
9 Months Ended
Sep. 30, 2020
Fair Value Disclosures [Abstract]  
Schedule of Fair Value of Fixed-Rate Debt The fair value of our fixed-rate debt is derived from quoted market prices by independent dealers (level 2 inputs as per the discussion above) and is as follows (in thousands):
As of
 September 30, 2020December 31, 2019
 Aggregate
Principal
Estimated  Fair
Value
Aggregate
Principal
Estimated  Fair
Value
7.00% senior notes
$300,000 $318,000 $300,000 $327,390 
6.00% senior notes
$400,000 $444,520 $400,000 $449,200 
5.125% senior notes
$300,000 $333,030 $300,000 $319,500