THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Allowance for Doubtful Accounts (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($)
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	$ 19,066
Current period provision of bad debt	17,070
Write-offs charged against the allowance	(16,298)
Recoveries collected	737
Balance at end of period	$ 20,575