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OTHER ACCRUED LIABILITIES (Tables)
 6 Months Ended
Jun. 30, 2020
Payables and Accruals [Abstract]  
Summary of Other Accrued Liabilities
Other accrued liabilities consisted of the following (in thousands): 
June 30, 2020December 31, 2019
 (unaudited) 
Personnel accruals$34,578  $45,934  
Insurance accruals12,559  14,289  
Property, sales and other non-income related taxes6,275  8,593  
Accrued commission1,800  3,299  
Accrued interest5,044  5,015  
Other7,479  9,376  
Total$67,735  $86,506