Annual report pursuant to Section 13 and 15(d)

Selected Quarterly Financial Data - Summary of Quarterly Financial Data (Detail)

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Selected Quarterly Financial Data - Summary of Quarterly Financial Data (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Dec. 31, 2014
Dec. 31, 2013
Sep. 30, 2012
Quarterly Financial Information Disclosure [Abstract]                        
Net Investment Revenue, net of provision $ 3,726us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss $ 4,269us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss $ 3,093us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss $ 2,382us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss $ (7,847)us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss $ 2,590us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss $ 1,332us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss $ 475us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss $ 487us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss $ 13,470us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss $ (3,450)us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss $ 1,996us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss
Other Investment Revenue 3,810us-gaap_RevenueOtherFinancialServices 3,544us-gaap_RevenueOtherFinancialServices 4,479us-gaap_RevenueOtherFinancialServices 3,317us-gaap_RevenueOtherFinancialServices 3,061us-gaap_RevenueOtherFinancialServices 2,206us-gaap_RevenueOtherFinancialServices 1,532us-gaap_RevenueOtherFinancialServices 281us-gaap_RevenueOtherFinancialServices 2,788us-gaap_RevenueOtherFinancialServices 15,150us-gaap_RevenueOtherFinancialServices 7,080us-gaap_RevenueOtherFinancialServices 15,292us-gaap_RevenueOtherFinancialServices
Total Revenue, net of investment interest expense and provision 7,536us-gaap_Revenues 7,813us-gaap_Revenues 7,572us-gaap_Revenues 5,699us-gaap_Revenues (4,786)us-gaap_Revenues 4,796us-gaap_Revenues 2,864us-gaap_Revenues 756us-gaap_Revenues 3,275us-gaap_Revenues 28,620us-gaap_Revenues 3,630us-gaap_Revenues 17,288us-gaap_Revenues
Other Expenses, net (5,867)us-gaap_OtherExpenses (4,604)us-gaap_OtherExpenses (5,527)us-gaap_OtherExpenses (2,826)us-gaap_OtherExpenses (3,000)us-gaap_OtherExpenses (2,902)us-gaap_OtherExpenses (8,638)us-gaap_OtherExpenses (1,975)us-gaap_OtherExpenses        
Net income (loss) before income taxes 1,669us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest 3,209us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest 2,045us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest 2,873us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest (7,786)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest 1,894us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest (5,774)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest (1,219)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest 949us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest 9,796us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest (12,885)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest 3,804us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Income tax (expense) benefit (189)us-gaap_IncomeTaxExpenseBenefit (607)us-gaap_IncomeTaxExpenseBenefit 830us-gaap_IncomeTaxExpenseBenefit (60)us-gaap_IncomeTaxExpenseBenefit 251us-gaap_IncomeTaxExpenseBenefit         (26)us-gaap_IncomeTaxExpenseBenefit 251us-gaap_IncomeTaxExpenseBenefit  
Net Income (Loss) 1,480us-gaap_ProfitLoss 2,602us-gaap_ProfitLoss 2,875us-gaap_ProfitLoss 2,813us-gaap_ProfitLoss (7,535)us-gaap_ProfitLoss 1,894us-gaap_ProfitLoss (5,774)us-gaap_ProfitLoss (1,219)us-gaap_ProfitLoss 949us-gaap_ProfitLoss 9,770us-gaap_ProfitLoss (12,634)us-gaap_ProfitLoss 3,804us-gaap_ProfitLoss
Net Income (Loss) attributable to controlling shareholders $ 1,462us-gaap_NetIncomeLoss $ 2,564us-gaap_NetIncomeLoss $ 2,828us-gaap_NetIncomeLoss $ 2,753us-gaap_NetIncomeLoss $ (7,330)us-gaap_NetIncomeLoss $ 1,842us-gaap_NetIncomeLoss $ (4,971)us-gaap_NetIncomeLoss     $ 9,607us-gaap_NetIncomeLoss $ (10,459)us-gaap_NetIncomeLoss  
Basic earnings per common share $ 0.05us-gaap_EarningsPerShareBasic $ 0.11us-gaap_EarningsPerShareBasic $ 0.13us-gaap_EarningsPerShareBasic $ 0.17us-gaap_EarningsPerShareBasic $ (0.48)us-gaap_EarningsPerShareBasic $ 0.11us-gaap_EarningsPerShareBasic $ (0.32)us-gaap_EarningsPerShareBasic     $ 0.43us-gaap_EarningsPerShareBasic $ (0.68)us-gaap_EarningsPerShareBasic  
Diluted earnings per common share $ 0.05us-gaap_EarningsPerShareDiluted $ 0.11us-gaap_EarningsPerShareDiluted $ 0.13us-gaap_EarningsPerShareDiluted $ 0.17us-gaap_EarningsPerShareDiluted $ (0.48)us-gaap_EarningsPerShareDiluted $ 0.11us-gaap_EarningsPerShareDiluted $ (0.32)us-gaap_EarningsPerShareDiluted     $ 0.43us-gaap_EarningsPerShareDiluted $ (0.68)us-gaap_EarningsPerShareDiluted