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ACCOUNTS RECEIVABLE, NET
 6 Months Ended
Jun. 30, 2018
Receivables [Abstract]  
ACCOUNTS RECEIVABLE, NET
ACCOUNTS RECEIVABLE, NET
Accounts receivable, net consists of the following:
(in thousands)
 
June 30,
2018
 
December 31,
2017
 
 
 
 
 
Billed
 
$
39,313

 
$
40,787

Unbilled
 
17,446

 
22,532

Subtotal
 
56,759

 
63,319

Less: Allowance for doubtful accounts
 
(11,333
)
 
(10,579
)
 
 
 
 
 
Total
 
$
45,426

 
$
52,740


Unbilled accounts receivable 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 foreclosure trustee 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 accounts receivable that are earned during a month and billed in the following month.