Basis and Summary of Significant Accounting Policies - Components of the Accounts Receivable Provision (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Accounting Policies [Abstract]
Bad Debt Expense	$ 1,016	$ 1,166
Provision for Returns and Uncollectible Renewal Payments	157,571	136,445
Accounts Receivable Provision	$ 158,587	$ 137,611