Summary of Significant Accounting Policies - Accounts Receivable and Doubtful Accounts (Details) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)
Accounting Policies [Abstract]
Maximum amount available to be sold under agreement	$ 140,000	$ 140,000
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	20,558	15,083
Charged to Costs and Expenses	12,309	17,784
Write-Offs Net of Recoveries	(3,209)	(3,209)
Ending Balance	29,658	29,658
Prepaid Expense and Other Current Assets, Allowance for Credit Loss [Roll Forward]
Beginning Balance	0	0
Charged to Costs and Expenses	7,359	7,359
Write-Offs Net of Recoveries	0	0
Ending Balance	$ 7,359	$ 7,359