Contract Balances

3 Months Ended

Mar. 31, 2018

Contract Balances

Contract Balances

11.Contract Balances

Our valuation and qualifying accounts activity as of March 31, 2018 were as follows:

Allowance for doubtful accounts	Balance at Beginning of Period		Charged to Costs and Expenses		Deductions		Balance at End of Period
	(In thousands)
For the three months ended March 31, 2018	$	15,056	$	21,263	$	(23,954)	$	12,365

Deferred revenue related to contracts with subscribers 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 subscribers were as follows:

	Contract
	Liabilities
	(In thousands)
Balance as of December 31, 2017	$	684,119
Recognition of unearned revenue		(1,860,169)
Deferral of revenue		1,896,745
Balance as of March 31, 2018	$	720,695

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.