Quarterly report pursuant to Section 13 or 15(d)

Derivative Instruments and Hedging Activities Schedule of Interest Rate Swap Payers Associated with TBA Contracts and MSRs (Details)

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Derivative Instruments and Hedging Activities Schedule of Interest Rate Swap Payers Associated with TBA Contracts and MSRs (Details) (Interest Rate Risk Associated with TBAs and MSR [Member], Interest Rate Swap [Member], Long [Member], USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Derivative [Line Items]  
Derivative, Notional Amount $ 1,020,000
Derivative Maturity Over Four Years From Balance Sheet Date [Member]
 
Derivative [Line Items]  
Derivative, Notional Amount $ 1,020,000
Derivative, Average Fixed Interest Rate 1.56%
Derivative, Average Variable Interest Rate 0.235%
Derivative, Weighted Average Remaining Maturity 4.694