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OTHER ACCRUED LIABILITIES (Tables)
3 Months Ended
Mar. 31, 2021
Payables and Accruals [Abstract]  
Other Accrued Liabilities
The following table presents the major components of Other accrued liabilities (in thousands):
March 31,
2021
December 31,
2020
Warranty$20,658 $20,570 
Chassis converter pool agreements18,234 17,767 
Payroll and related taxes12,436 16,163 
Customer deposits31,118 37,792 
Self-insurance14,211 12,086 
Accrued interest8,699 4,368 
Operating lease obligations3,768 4,117 
Accrued taxes6,375 4,790 
All other11,825 13,327 
$127,324 $130,980 
Changes in Product Warranty Accrual
The following table presents the changes in the product warranty accrual included in Other accrued liabilities (in thousands):
20212020
Balance as of January 1$20,570 $22,575 
Provision for warranties issued in current year1,397 973 
Payments(1,309)(1,203)
Balance as of March 31$20,658 $22,345