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FAIR VALUE DISCLOSURES (Tables)
3 Months Ended
Mar. 31, 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
 March 31, 2020December 31, 2019
 Aggregate
Principal
Estimated  Fair
Value
Aggregate
Principal
Estimated  Fair
Value
7.00% senior notes
$300,000  $292,500  $300,000  $327,390  
6.00% senior notes
$400,000  $372,000  $400,000  $449,200  
5.125% senior notes
$300,000  $271,500  $300,000  $319,500