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DERIVATIVE FINANCIAL INSTRUMENTS (Details Textual) (USD $)
Mar. 31, 2015
Dec. 31, 2014
swap
Aug. 31, 2014
swap
May 31, 2012
Interest Rate Swap        
Notional Amount $ 175,000,000invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
     
Interest Rate Swap | Borrowings        
Number of interest rate derivatives held 2us-gaap_NumberOfInterestRateDerivativesHeld
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_BorrowingsMember
6us-gaap_NumberOfInterestRateDerivativesHeld
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_BorrowingsMember
   
Notional Amount 50,000,000invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_BorrowingsMember
175,000invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_BorrowingsMember
   
Interest Rate Swap | Brokered Money Market Deposits        
Number of interest rate derivatives held     2us-gaap_NumberOfInterestRateDerivativesHeld
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= crfn_BrokeredMoneyMarketDepositsMember
 
Notional Amount     50,000,000invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= crfn_BrokeredMoneyMarketDepositsMember
 
Terminated Interest Rate Swap        
Notional Amount 100,000,000invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= crfn_TerminatedInterestRateSwapMember
     
Number of instruments terminated 4crfn_DerivativeNumberofInstrumentsTerminated
/ us-gaap_DerivativeInstrumentRiskAxis
= crfn_TerminatedInterestRateSwapMember
     
Cap 1        
Notional Amount 7,500,000invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= crfn_InterestRateCap1Member
    7,500,000invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= crfn_InterestRateCap1Member
Cap 2        
Notional Amount 8,000,000invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= crfn_InterestRateCap2Member
    8,000,000invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= crfn_InterestRateCap2Member
Cap 3        
Notional Amount 25,000,000invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= crfn_InterestRateCap3Member
  25,000,000invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= crfn_InterestRateCap3Member
 
Cap 4        
Notional Amount $ 10,000,000invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= crfn_InterestRateCap4Member
  $ 10,000,000invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= crfn_InterestRateCap4Member