XML 64 R48.htm IDEA: XBRL DOCUMENT v3.20.4
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Product Warranty Accrual Included in Other Accrued Liabilities (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward]    
Balance as of January 1 $ 22,575 $ 22,247
Provision for warranties issued in current year 4,334 8,027
Net adjustment to warranty accrual (228) (2,320)
Payments (6,111) (5,379)
Balance as of December 31 $ 20,570 $ 22,575