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Accounts Receivable
9 Months Ended
Sep. 30, 2018
Receivables [Abstract]  
Receivables
Receivables

Receivables at September 30, 2018 and December 31, 2017 were comprised of the following (in thousands):

 
September 30,
2018
 
December 31,
2017
Trade receivables
$
52,565

 
$
58,067

Unpaid amounts for benefit services
35,580

 
52,054

Receivables, gross
88,145

 
110,121

Less: allowance for doubtful accounts
(3,590
)
 
(2,574
)
Receivables, net
$
84,555

 
$
107,547