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BORROWINGS Subordinated Term Loans (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Sep. 30, 2008
Debt Instrument [Line Items]      
Long-term debt $ 180,164us-gaap_LongTermDebt $ 72,921us-gaap_LongTermDebt  
Subordinated term loan due 2018 7,060us-gaap_JuniorSubordinatedNotes 6,961us-gaap_JuniorSubordinatedNotes  
Unsecured Subordinated Term Loan Effective September 26 2008 | LIBOR Plus Four Percent      
Debt Instrument [Line Items]      
Debt instrument, basis spread on variable rate 4.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_DebtInstrumentAxis
= crfn_UnsecuredSubordinatedTermLoanEffectiveSeptember262008Member
/ crfn_InterestRateTypeAxis
= crfn_LiborPlusFourPercentMember
   
Unsecured Subordinated Term Loan Effective September 26 2008 | Unsecured Subordinated Term Loan      
Debt Instrument [Line Items]      
Long-term debt   $ 6,961us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= crfn_UnsecuredSubordinatedTermLoanEffectiveSeptember262008Member
/ us-gaap_LongtermDebtTypeAxis
= crfn_UnsecuredSubordinatedTermLoanMember
$ 7,500us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= crfn_UnsecuredSubordinatedTermLoanEffectiveSeptember262008Member
/ us-gaap_LongtermDebtTypeAxis
= crfn_UnsecuredSubordinatedTermLoanMember
Phase out of capital qualification term 5 years