Contract Balances (Tables)

6 Months Ended

Jun. 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 six months ended June 30, 2020	$	19,280	$	51,808	$	(29,900)	$	41,188

Schedule of Contract balances

	Contract
	Liabilities
	(In thousands)
Balance as of December 31, 2019	$	609,054
Recognition of unearned revenue		(2,951,822)
Deferral of revenue		2,925,648
Balance as of June 30, 2020	$	582,880