Contract Balances (Tables)

9 Months Ended

Sep. 30, 2020

Contract Balances

Valuation and Qualifying Accounts

Allowance for credit losses	Balance at Beginning of Period		Current Period Provision for Expected Credit Losses		Write-offs Charged Against Allowance		Balance at End of Period
	(In thousands)
For the nine months ended September 30, 2020	$	19,280	$	56,398	$	(41,313)	$	34,365

Schedule of Contract balances

	Contract
	Liabilities
	(In thousands)
Balance as of December 31, 2019	$	609,054
Recognition of unearned revenue		(4,369,230)
Deferral of revenue		4,365,480
Balance as of September 30, 2020	$	605,304