Quarterly report pursuant to Section 13 or 15(d)

Notes Receivable from Partners - Schedule of Notes Receivable from Partners (Detail)

v3.8.0.1
Notes Receivable from Partners - Schedule of Notes Receivable from Partners (Detail) - USD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
Accounts Notes And Loans Receivable [Line Items]      
New note receivable issued to partners $ 165 $ 120  
Partners      
Accounts Notes And Loans Receivable [Line Items]      
Beginning balance 2,085 $ 2,789 $ 2,789
New note receivable issued to partners 165   120
Repayment of notes (371)   (880)
Interest accrued and capitalized on notes receivable 29   56
Ending balance $ 1,908   $ 2,085