ACCOUNTS RECEIVABLE, NET
 6 Months Ended
Jun. 30, 2016
Receivables [Abstract]  
ACCOUNTS RECEIVABLE, NET
ACCOUNTS RECEIVABLE, NET
Accounts receivable, net consists of the following:
(in thousands)
 
June 30,
2016
 
December 31,
2015
 
 
 
 
 
Billed
 
$
61,211

 
$
67,021

Unbilled
 
50,548

 
56,458

 
 
111,759

 
123,479

Less: allowance for doubtful accounts
 
(11,594
)
 
(18,456
)
 
 
 
 
 
Total
 
$
100,165

 
$
105,023


Unbilled receivables consist primarily of certain asset management 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 in unbilled receivables amounts that are earned during a month and billed in the following month.