Quarterly report pursuant to Section 13 or 15(d)

Receivables, Net - Summary of Receivables (Detail)

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Receivables, Net - Summary of Receivables (Detail) - USD ($)
$ in Thousands
Sep. 30, 2015
Dec. 31, 2014
Receivables [Abstract]    
Management and advisory fees receivable $ 2,037 $ 2,705
Unbilled receivables 2,322 2,229
Other receivables 2 2
Receivables 4,361 4,936
Allowance for doubtful receivables (358) (402)
Receivables, net $ 4,003 $ 4,534