CONSOLIDATED FINANCIAL STATEMENT DETAILS - Allowance for Credit Loss (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at January 1	$ 26,046	$ 19,066
Current period provision for credit losses	19,118	17,070
Write-offs charged against the credit loss reserve	(20,570)	(16,298)
Recoveries collected	758	737
Balance at March 31	25,352	20,575
Revenue reserve	3,500	1,800
Allowance and reserves	$ 28,908	$ 22,400	$ 27,839