XML 37 R23.htm IDEA: XBRL DOCUMENT v3.10.0.1
Contract Balances
 12 Months Ended
Dec. 31, 2018
Contract Balances  
Contract Balances

16.    Contract Balances

 

Our valuation and qualifying accounts as of December 31, 2018, 2017 and 2016 were as follows:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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

 

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 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, 2017

 

$

699,597

Recognition of unearned revenue

 

 

(6,855,912)

Deferral of revenue

 

 

6,791,333

Balance as of December 31, 2018

 

$

635,018

 

 

 

 

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.