THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Revenue Recognition (Details) - USD ($)	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Deferred revenue	$ 240,954,000	$ 218,843,000
Deferred revenue recognized	216,600,000
Noncurrent deferred revenue	$ 0	$ 0