Annual report pursuant to Section 13 and 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
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Accounts Notes And Loans Receivable [Line Items]    
New notes receivable issued to partners $ 165 $ 120
Partners    
Accounts Notes And Loans Receivable [Line Items]    
Beginning balance 2,085 2,789
New notes receivable issued to partners 165 120
Repayment of notes (371) (880)
Interest accrued and capitalized on notes receivable 39 56
Ending balance $ 1,918 $ 2,085