Annual report pursuant to Section 13 and 15(d)

DERIVATIVES - Schedule of gains (losses) recorded in relation to derivatives (Details 1)

v2.4.1.9
DERIVATIVES - Schedule of gains (losses) recorded in relation to derivatives (Details 1) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Cash flow hedges      
Cash flow hedge income statement location - ineffective portion     Other income (loss)
Realized gain (loss) on the ineffective portion     $ 483us-gaap_GainLossOnCashFlowHedgeIneffectivenessNet
Cash flow hedge income statement location - loss at de-designation     Gain (loss) on sale of investments, Other income (loss)
Loss immediately recognized at de-designation     (7,036)nct_GainLossImmediatelyRecognizedAtDedesignation
Cash flow hedge income statement location - reclassifications Interest expense Interest expense Interest expense
Deferred hedge gain (loss) reclassified from AOCI into earnings 27nct_DeferredHedgeGainLossReclassifiedFromAOCIIntoEarnings (99)nct_DeferredHedgeGainLossReclassifiedFromAOCIIntoEarnings 1,249nct_DeferredHedgeGainLossReclassifiedFromAOCIIntoEarnings
Amount of loss reclassified from AOCI into income (effective portion) (4,379)us-gaap_DerivativeInstrumentsLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortion (6,128)us-gaap_DerivativeInstrumentsLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortion (30,631)us-gaap_DerivativeInstrumentsLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortion
Non-hedge income statement location Other income Other income Other income
Gain recognized related to interest rate swaps 7,131us-gaap_GainLossOnInterestRateDerivativeInstrumentsNotDesignatedAsHedgingInstruments 10,577us-gaap_GainLossOnInterestRateDerivativeInstrumentsNotDesignatedAsHedgingInstruments 9,101us-gaap_GainLossOnInterestRateDerivativeInstrumentsNotDesignatedAsHedgingInstruments
Non-hedge income statement location - linked transactions interest expense Interest expense Interest expense  
Linked transactions non-hedge interest expense (211)us-gaap_DerivativeGainOnDerivative (236)us-gaap_DerivativeGainOnDerivative  
Amount of unrealized gain (loss) recognized in OCI on derivatives (effective portion) (177)us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet (195)us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet (11,825)us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet
TBAs [Member] | Not designated as hedging instrument [Member]      
Cash flow hedges      
Non-hedge income statement location Other income (loss)    
Gain recognized related to non-hedge (2,030)us-gaap_GainLossOnSaleOfDerivatives
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_OtherContractMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
   
Linked Transactions [Member]      
Cash flow hedges      
Non-hedge income statement location Other income Other income  
Gain recognized related to non-hedge $ 12,498us-gaap_GainLossOnSaleOfDerivatives
/ us-gaap_DerivativeByNatureAxis
= nct_LinkedTransactionDerivativeAssetMember
$ 1,168us-gaap_GainLossOnSaleOfDerivatives
/ us-gaap_DerivativeByNatureAxis
= nct_LinkedTransactionDerivativeAssetMember