Contract Balances (Tables)

12 Months Ended

Dec. 31, 2018

Contract Balances

Summary of activity in the allowance for doubtful accounts

Allowance for doubtful accounts	Balance at Beginning of Year		Charged to Costs and Expenses		Deductions		Balance at End of Year
	(In thousands)
For the years ended:
December 31, 2018	$	15,511	$	98,575	$	(97,120)	$	16,966
December 31, 2017	$	18,399	$	124,126	$	(127,014)	$	15,511
December 31, 2016	$	22,965	$	153,792	$	(158,358)	$	18,399

Schedule of changes in deferred revenue related to contracts with subscribers

	Contract
	Liabilities
	(In thousands)
Balance as of December 31, 2017	$	699,597
Recognition of unearned revenue		(6,855,912)
Deferral of revenue		6,791,333
Balance as of December 31, 2018	$	635,018