Contract Balances

3 Months Ended

Mar. 31, 2021

Contract Balances

Contract Balances

13.Contract Balances

Our valuation and qualifying accounts as of March 31, 2021 were as follows:

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 three months ended March 31, 2021	$	72,278	$	11,168	$	(26,821)	$	56,625

Deferred revenue related to contracts with our customers is recorded in “Deferred revenue and other” and “Long-term deferred revenue and other long-term liabilities” on our Condensed Consolidated Balance Sheets. Changes in deferred revenue related to contracts with our customers were as follows:

	Contract
	Liabilities
	(In thousands)
Balance as of December 31, 2020	$	778,832
Recognition of unearned revenue		(3,050,520)
Deferral of revenue		3,059,704
Balance as of March 31, 2021	$	788,016

We apply a practical expedient and do not disclose the value of the remaining performance obligations for contracts that are less than one year in duration, which represent a substantial majority of our revenue. As such, the amount of revenue related to unsatisfied performance obligations is not necessarily indicative of our future revenue.