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EMPLOYEE AND DIRECTOR BENEFIT PLANS- Piedmont Stock Warrants (Details) (USD $)
12 Months Ended 0 Months Ended 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2010
Director
Jul. 04, 2014
Dec. 31, 2011
Jan. 24, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of directors warrants granted to       2crfn_NumberofDirectorsWarrantsGrantedTo      
Stock-based compensation $ 941,000us-gaap_ShareBasedCompensation $ 1,153,000us-gaap_ShareBasedCompensation $ 2,266,000us-gaap_ShareBasedCompensation        
Yadkin Financial Corporation              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Shares issued in trust         856,447crfn_BusinessAcquisitionEquityInterestIssuedorIssuableNumberofSharesHeldinTrust
/ us-gaap_BusinessAcquisitionAxis
= crfn_YadkinFinancialCorporationMember
   
Piedmont Community Bank Holdings Inc | Yadkin Financial Corporation              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock exchange ratio             6.28597crfn_BusinessCombinationConversionofStockConversionRatio
/ us-gaap_BusinessAcquisitionAxis
= crfn_YadkinFinancialCorporationMember
/ dei_LegalEntityAxis
= crfn_PiedmontCommunityBankHoldingsIncMember
Piedmont Community Bank Holdings Inc | Common Stock Warrants              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Award requisite service period (in years) 10 years            
Vesting rate (as a percent)   25.00%crfn_ShareBasedCompensationArrangementByShareBasePaymentAwardVestingRate
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
/ dei_LegalEntityAxis
= crfn_PiedmontCommunityBankHoldingsIncMember
  25.00%crfn_ShareBasedCompensationArrangementByShareBasePaymentAwardVestingRate
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
/ dei_LegalEntityAxis
= crfn_PiedmontCommunityBankHoldingsIncMember
  25.00%crfn_ShareBasedCompensationArrangementByShareBasePaymentAwardVestingRate
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
/ dei_LegalEntityAxis
= crfn_PiedmontCommunityBankHoldingsIncMember
 
Increase in initial exercise price (as a percent) 8.00%crfn_ShareBasedCompensationArrangementByShareBasePaymentAwardIncreaseInInitialExercisePrice
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
/ dei_LegalEntityAxis
= crfn_PiedmontCommunityBankHoldingsIncMember
           
Warrants outstanding (in shares)   146,666crfn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsOutstandingNumber
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
/ dei_LegalEntityAxis
= crfn_PiedmontCommunityBankHoldingsIncMember
         
Stock-based compensation 605,000us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
/ dei_LegalEntityAxis
= crfn_PiedmontCommunityBankHoldingsIncMember
1,145,000us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
/ dei_LegalEntityAxis
= crfn_PiedmontCommunityBankHoldingsIncMember
2,235,000us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
/ dei_LegalEntityAxis
= crfn_PiedmontCommunityBankHoldingsIncMember
       
Nonvested awards, compensation not yet recognized, share-based awards other than options $ 245,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
/ dei_LegalEntityAxis
= crfn_PiedmontCommunityBankHoldingsIncMember
$ 850,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
/ dei_LegalEntityAxis
= crfn_PiedmontCommunityBankHoldingsIncMember