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ACCOUNTS RECEIVABLE, NET
 6 Months Ended
Jun. 30, 2017
Receivables [Abstract]  
ACCOUNTS RECEIVABLE, NET
ACCOUNTS RECEIVABLE, NET
Accounts receivable, net consists of the following:
(in thousands)
 
June 30,
2017
 
December 31,
2016
 
 
 
 
 
Billed
 
$
53,703

 
$
58,392

Unbilled
 
31,242

 
39,853

 
 
84,945

 
98,245

Less: Allowance for doubtful accounts
 
(11,968
)
 
(10,424
)
 
 
 
 
 
Total
 
$
72,977

 
$
87,821


Unbilled receivables consist primarily of certain real estate asset management and sales services for which we generally recognize revenue when the service is provided but collect upon closing of the sale, and default management services, for which we generally recognize revenues over the service delivery period but bill following completion of the service. We also include amounts in unbilled receivables that are earned during a month and billed in the following month.