Business and Summary of Significant Accounting Policies - Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	$ 62,704	$ 46,946	$ 35,690
Accounts Written Off, net of Recoveries	(309,374)	(252,330)	(192,133)
Accounts Receivable Provision	322,963	268,088	203,389
Ending Balance	$ 76,293	$ 62,704	$ 46,946