Accounts Receivable, Net - Schedule of Changes in the Allowance for Doubtful Accounts on Accounts Receivable (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	$ (14,379)	$ (13,389)	$ (13,827)
Provision	(9,323)	(8,433)	(7,052)
Charge-offs, net of recoveries	8,808	7,443	7,490
Balance at end of period	$ (14,894)	$ (14,379)	$ (13,389)