Annual report pursuant to Section 13 and 15(d)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Reclassification from accumulated other comprehensive income (Details 2)

v2.4.1.9
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Reclassification from accumulated other comprehensive income (Details 2) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Net realized gain (loss) on securities      
Impairment   $ (5,266)us-gaap_ImpairmentOfInvestments  
Income statement location - impairment of real estate securities   Other-than-temporary impairment on securities, net of portion of other-than-temporary impairment on securities recognized in other comprehensive income  
Reclassification of net realized (gain) loss on securities into earnings 23,679us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax 995us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax (8,727)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax
Net realized gain (loss) on derivatives designated as cash flow hedges      
Cash flow hedge income statement location - ineffective portion     Other income (loss)
Hedge ineffectiveness     483us-gaap_GainLossOnCashFlowHedgeIneffectivenessNet
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
Loss reclassified from AOCI into income, related to effective portion (4,379)us-gaap_DerivativeInstrumentsLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortion (6,128)us-gaap_DerivativeInstrumentsLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortion (30,631)us-gaap_DerivativeInstrumentsLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortion
Net realized gains (losses) on derivatives designated as cash flow hedges (4,352)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax (6,227)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax  
Total reclassifications 19,327nct_RecognizedReclassifiedAccumulatedOtherComprehensiveIncomeToNetIncome (5,232)nct_RecognizedReclassifiedAccumulatedOtherComprehensiveIncomeToNetIncome  
Real Estate Securities [Member]      
Net realized gain (loss) on securities      
Gain on settlement of investments 23,679nct_GainOnInvestments
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_AvailableforsaleSecuritiesMember
9,853nct_GainOnInvestments
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_AvailableforsaleSecuritiesMember
14,629nct_GainOnInvestments
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_AvailableforsaleSecuritiesMember
Loss on settlement of investments   $ (3,592)nct_LossesOnInvestments
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_AvailableforsaleSecuritiesMember
$ (4,433)nct_LossesOnInvestments
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_AvailableforsaleSecuritiesMember
Income statement location - gain (loss) on settlement of real estate securities Gain (loss) on settlement of investments, net Gain (loss) on settlement of investments, net