Annual report pursuant to Section 13 and 15(d)

Variable Interest Entities (Details)

v3.6.0.2
Variable Interest Entities (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Variable Interest Entity [Line Items]    
Variable Interest Entity, Consolidated, Carrying Amount, Assets $ 3,336,292 $ 3,237,918
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities 3,058,278 2,017,677
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets 1,902,384 1,852,430
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount 1,902,384 1,852,430
Loans Held-for-Investment, Residential Mortgages [Member]    
Variable Interest Entity [Line Items]    
Variable Interest Entity, Consolidated, Carrying Amount, Assets 3,271,317 3,173,727
Commercial Real Estate Assets [Member]    
Variable Interest Entity [Line Items]    
Variable Interest Entity, Consolidated, Carrying Amount, Assets 45,885 45,698
Accrued Income Receivable [Member]    
Variable Interest Entity [Line Items]    
Variable Interest Entity, Consolidated, Carrying Amount, Assets 19,090 18,493
Assets, Total [Member]    
Variable Interest Entity [Line Items]    
Variable Interest Entity, Consolidated, Carrying Amount, Assets 3,336,292 3,237,918
Borrowings [Member]    
Variable Interest Entity [Line Items]    
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities 3,037,196 2,000,110
Accrued Liabilities [Member]    
Variable Interest Entity [Line Items]    
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities 8,708 5,943
Accounts Payable [Member]    
Variable Interest Entity [Line Items]    
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities 12,374 11,624
Liabilities, Total [Member]    
Variable Interest Entity [Line Items]    
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities $ 3,058,278 $ 2,017,677