REVENUES FROM CONTRACTS WITH CUSTOMERS - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Disaggregation Of Revenue [Abstract]
Contract liability	$ 13.4		$ 13.4		$ 15.0
Contract acquisition costs weighted average estimated period			6 years 3 months 18 days
Amortized deferred sales incentive cost	$ 2.2	$ 1.8	$ 6.5	$ 5.0