| REAL ESTATE RELATED LOANS, RESIDENTIAL MORTGAGE LOANS AND SUBPRIME MORTGAGE LOANS (Details Narrative) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 
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| Mar. 31, 2015 | |
| Face amount of real estate related loans on non-accrual status | $ 76,400us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus | 
| Weighted Average Yield of Retained Bonds | 21.25%nct_WeightedAverageYieldRetainedBonds | 
| Subprime Portfolio I [Member] | |
| Average loan seasoning | 9 years 8 months 2 days | 
| Retained Notes excluded from face amount of debt in Subprime Portfolio I | $ 4,000nct_RetainedBondsFaceAmount2006SecuritizationTrust / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nct_SubprimePortfolioIMember | 
| Weighted average coupon rate | 9.24%nct_WeightedAverageCouponSubprimeSubjectToCallOption / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nct_SubprimePortfolioIMember | 
| Subprime Portfolio II [Member] | |
| Average loan seasoning | 8 years 2 months 1 day | 
| Weighted average coupon rate | 8.68%nct_WeightedAverageCouponSubprimeSubjectToCallOption / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nct_SubprimePortfolioIIMember | 
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- Definition Average term of loan seasoning for items within Subprime Portfolios I and II. No definition available. 
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- Definition Face amount of retained bonds from Securitization trust 2006 for subprime loans. No definition available. 
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- Definition The weighted average coupon rate for loans subject to call option within Subprime Portfolios I and II. No definition available. 
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- Definition Weighted average yield rate of retained bonds within Subprime portfolios. No definition available. 
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- Definition Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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