Annual report pursuant to Section 13 and 15(d)

Debt - Summary of Notes Payable (Detail)

v2.4.1.9
Debt - Summary of Notes Payable (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Debt Instrument [Line Items]    
Total, Notes payable $ 4,124us-gaap_NotesPayable $ 8,303us-gaap_NotesPayable
Notes Payable    
Debt Instrument [Line Items]    
Principal on fixed rate notes, interest rate 5.00%us-gaap_LongTermDebtPercentageBearingFixedInterestRate
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_NotesPayableOtherPayablesMember
5.00%us-gaap_LongTermDebtPercentageBearingFixedInterestRate
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_NotesPayableOtherPayablesMember
Variable rate notes issued for redemption of partners' interests, reference rate Prime  
Variable rate notes issued for redemption of partners' interests, spread 1.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_NotesPayableOtherPayablesMember
1.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_NotesPayableOtherPayablesMember
Principal on fixed rate notes, amount 1,417us-gaap_LongtermDebtPercentageBearingFixedInterestAmount
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_NotesPayableOtherPayablesMember
2,665us-gaap_LongtermDebtPercentageBearingFixedInterestAmount
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_NotesPayableOtherPayablesMember
Variable rate notes issued for redemption of partners' interests, amount 2,683us-gaap_LongtermDebtPercentageBearingVariableInterestAmount
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_NotesPayableOtherPayablesMember
5,486us-gaap_LongtermDebtPercentageBearingVariableInterestAmount
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_NotesPayableOtherPayablesMember
Interest payable $ 24us-gaap_InterestPayableCurrentAndNoncurrent
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_NotesPayableOtherPayablesMember
$ 152us-gaap_InterestPayableCurrentAndNoncurrent
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_NotesPayableOtherPayablesMember