Quarterly report pursuant to Section 13 or 15(d)

Variable Interest Entities (Details)

v3.4.0.3
Variable Interest Entities (Details) - USD ($)
$ in Thousands
Mar. 31, 2016
Dec. 31, 2015
Variable Interest Entity [Line Items]    
Variable Interest Entity, Consolidated, Carrying Amount, Assets $ 3,772,081 $ 3,237,918
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities 2,829,662 2,017,677
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets 1,600,000 1,900,000
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount 1,575,358 1,852,430
Loans Held-for-investment, Residential Mortgages [Member]    
Variable Interest Entity [Line Items]    
Variable Interest Entity, Consolidated, Carrying Amount, Assets 3,705,647 3,173,727
Commercial Real Estate Assets [Member]    
Variable Interest Entity [Line Items]    
Variable Interest Entity, Consolidated, Carrying Amount, Assets 45,744 45,698
Accrued Income Receivable [Member]    
Variable Interest Entity [Line Items]    
Variable Interest Entity, Consolidated, Carrying Amount, Assets 20,690 18,493
Assets, Total [Member]    
Variable Interest Entity [Line Items]    
Variable Interest Entity, Consolidated, Carrying Amount, Assets 3,772,081 3,237,918
Borrowings [Member]    
Variable Interest Entity [Line Items]    
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities 2,809,627 2,000,110
Accrued Liabilities [Member]    
Variable Interest Entity [Line Items]    
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities 7,625 5,943
Accounts Payable [Member]    
Variable Interest Entity [Line Items]    
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities 12,410 11,624
Liabilities, Total [Member]    
Variable Interest Entity [Line Items]    
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities $ 2,829,662 $ 2,017,677