Quarterly report pursuant to Section 13 or 15(d)

COMMITMENTS AND CONTINGENCIES - Narrative (Details)

v3.19.2
COMMITMENTS AND CONTINGENCIES - Narrative (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract]            
Standard product warranty accrual $ 20,927 $ 23,213 $ 24,552 $ 23,659 $ 23,812 $ 23,328