Quarterly report pursuant to Section 13 or 15(d)

GAINS (LOSSES) ON SETTLEMENT OF INVESTMENTS, NET AND OTHER INCOME (LOSS), NET (Details)

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GAINS (LOSSES) ON SETTLEMENT OF INVESTMENTS, NET AND OTHER INCOME (LOSS), NET (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Gain (loss) on settlement of investments, net    
Gain on settlement of real estate securities $ 5,886nct_GainOnInvestments $ 2,334nct_GainOnInvestments
Settlement of TBAs (4,871)nct_SettlementOfTBAs  
Gain on settlement of investments, net 1,015us-gaap_GainLossOnInvestments 2,334us-gaap_GainLossOnInvestments
Other income (loss), net    
Gain (loss) on non-hedge derivative instruments (1,029)nct_GainLossNonHedgeDerivatives 12,748nct_GainLossNonHedgeDerivatives
Collateral management fee income, net 193us-gaap_ManagementFeesRevenue 265us-gaap_ManagementFeesRevenue
Equity (deficit) in earnings of equity method investees 314nct_IncomeLossFromEquityMethodInvestments2 (39)nct_IncomeLossFromEquityMethodInvestments2
Gain (loss) on disposal of long-lived assets (183)us-gaap_GainLossOnDispositionOfAssets (2)us-gaap_GainLossOnDispositionOfAssets
Other income 191us-gaap_OtherNonoperatingIncome 502us-gaap_OtherNonoperatingIncome
Total Other income (loss), net $ (514)us-gaap_OtherNonoperatingGainsLosses $ 13,474us-gaap_OtherNonoperatingGainsLosses