Summary of Significant Accounting Policies - Schedule of Changes in Allowance for Doubtful Accounts and Sales Allowances (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accounting Policies [Abstract]
Review period for past due accounts	90 days
Allowance for Doubtful Accounts
Allowances, at beginning of year	$ 3,382	$ 3,030	$ 2,600
Charged as a reduction of revenue	11,751	8,703	7,734
Charged to bad debt expense in general and administrative expenses	1,432	1,688	1,385
Write-offs, net of recoveries	(9,806)	(10,039)	(8,689)
Allowances, at end of year	$ 6,759	$ 3,382	$ 3,030