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FAIR VALUE MEASUREMENTS (Notes)
3 Months Ended
Mar. 31, 2021
Fair Value Disclosures [Abstract]  
FAIR VALUE MEASUREMENTS FAIR VALUE MEASUREMENTS
Assets Measured at Fair Value on a Recurring Basis

We measure deferred compensation investments on a recurring basis. As of March 31, 2021 and December 31, 2020, our deferred compensation investments were classified as either Level 1 or Level 2 in the fair value hierarchy. Assets valued using quoted market prices in active markets and classified as Level 1 are money market and mutual funds. Assets valued based on other observable inputs and classified as Level 2 are insurance contracts.

The following tables summarize our deferred compensation investments measured at fair value on a recurring basis (in thousands):
  Fair Value Measurements at Reporting Date Using
 March 31,
2021
Quoted Prices in
Active Markets
for Identical
Assets (Level 1)
Significant
Other
Observable
Inputs (Level 2)
Significant
Unobservable
Inputs
(Level 3)
Financial assets:    
Deferred compensation assets$371 $97 $274 $— 
  Fair Value Measurements at Reporting Date Using
 December 31, 2020Quoted Prices in
Active Markets
for Identical
Assets (Level 1)
Significant
Other
Observable
Inputs (Level 2)
Significant
Unobservable
Inputs
(Level 3)
Financial assets:    
Deferred compensation assets$522 $282 $240 $— 

Financial Instruments Not Recorded at Fair Value

The carrying amounts of our other financial assets and liabilities including cash, accounts receivable, accounts payable, and accrued liabilities approximate their respective fair values because of the relatively short period of time between their origination and their expected realization or settlement.