Quarterly report pursuant to Section 13 or 15(d)

Variable Interest Entities Variable Interest Entities (Details)

v2.4.0.6
Variable Interest Entities Variable Interest Entities (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Variable Interest Entity [Line Items]    
Variable Interest Entity, Consolidated, Carrying Amount, Assets $ 435,469 $ 0
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities 398,068 0
Loans Held-for-investment, Mortgages [Member]
    
Variable Interest Entity [Line Items]    
Variable Interest Entity, Consolidated, Carrying Amount, Assets 434,068 0
Accrued Income Receivable [Member]
    
Variable Interest Entity [Line Items]    
Variable Interest Entity, Consolidated, Carrying Amount, Assets 1,401 0
Assets, Total [Member]
    
Variable Interest Entity [Line Items]    
Variable Interest Entity, Consolidated, Carrying Amount, Assets 435,469 0
Borrowings [Member]
    
Variable Interest Entity [Line Items]    
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities 397,229 0
Accrued Liabilities [Member]
    
Variable Interest Entity [Line Items]    
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities 744 0
Accounts Payable [Member]
    
Variable Interest Entity [Line Items]    
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities 95 0
Liabilities, Total [Member]
    
Variable Interest Entity [Line Items]    
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities $ 398,068 $ 0