Quarterly report pursuant to Section 13 or 15(d)

REAL ESTATE SECURITIES - Credit Losses on Debt Securities (Details 3)

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REAL ESTATE SECURITIES - Credit Losses on Debt Securities (Details 3) (Securities in an Unrealized Loss Position [Member], USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Securities in an Unrealized Loss Position [Member]
 
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]  
Beginning balance of credit losses on debt securities for which a portion of an OTTI was recognized in other comprehensive income $ (4,174)us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= nct_SecuritiesUnrealizedLossMember
Additions for credit losses on securities for which an OTTI was not previously recognized (48)us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsNoPreviousImpairment
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= nct_SecuritiesUnrealizedLossMember
Reduction for credit losses on securities for which no OTTI was recognized in other comprehensive income at the current measurement date 4,174us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsChangeInStatus
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= nct_SecuritiesUnrealizedLossMember
Ending balance of credit losses on debt securities for which a portion of an OTTI was recognized in other comprehensive income $ (48)us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= nct_SecuritiesUnrealizedLossMember