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REVENUE RECOGNITION (Tables)
 6 Months Ended
Jun. 30, 2019
Revenue From Contract With Customer [Abstract]  
Schedule of Assets and Liabilities Associated with Contracts from Customers

The following table provides information about assets and liabilities associated with our contracts from customers (in thousands):

 

 

 

As of  June 30, 2019

 

Accounts receivable

 

$

66,952

 

Short-term unbilled receivables

 

 

730

 

Long-term unbilled receivables

 

 

575

 

Short-term deferred revenue

 

 

82,472

 

Long-term deferred revenue

 

 

44,651

 
Summary of Significant Changes in Unbilled Receivables and Deferred Liabilities Balances

Significant changes in the unbilled receivables and deferred liabilities balances during the period are as follows (in thousands):

 

 

Six Months Ended June 30, 2019

 

 

 

Unbilled Receivables

Increase (Decrease)

 

 

Deferred Revenue

(Increase) Decrease

 

Balance at December 31, 2018

 

$

1,020

 

 

$

(122,567

)

Revenue recognized that was previously included in deferred revenue

 

 

—

 

 

 

63,337

 

Increases due to cash received

 

 

—

 

 

 

(68,213

)

Cumulative catch-up adjustment arising from changes in estimates of
   transaction price

 

 

—

 

 

 

320

 

Unbilled receivables recognized

 

 

1,064

 

 

 

—

 

Transferred to receivables from unbilled receivables

 

 

(779

)

 

 

—

 

Net change

 

 

285

 

 

 

(4,556

)

Balance at June 30, 2019

 

$

1,305

 

 

$

(127,123

)