Quarterly report pursuant to Section 13 or 15(d)

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

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Notes Receivable from Partners - Schedule of Notes Receivable from Partners (Detail) (USD $)
In Thousands, unless otherwise specified
6 Months Ended 12 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Partners
Dec. 31, 2013
Partners
Accounts Notes And Loans Receivable [Line Items]        
Beginning balance     $ 3,052 $ 3,410
Repayment of notes (741) (887) (833) (887)
Interest accrued and capitalized on notes receivable     33 74
New notes receivable issued to partners       455
Ending balance     $ 2,252 $ 3,052