Quarterly report pursuant to Section 13 or 15(d)

COMMITMENTS AND CONTINGENCIES - Narrative (Details)

v3.10.0.1
COMMITMENTS AND CONTINGENCIES - Narrative (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Jun. 30, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]            
Standard product warranty accrual $ 22,864 $ 23,659 $ 23,328 $ 24,432 $ 23,620 $ 22,660