Quarterly report pursuant to Section 13 or 15(d)

Variable Interest Entities (Details)

v3.7.0.1
Variable Interest Entities (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Variable Interest Entity [Line Items]    
Assets of consolidated Variable Interest Entities $ 3,184,374 $ 3,336,292
Liabilities of consolidated Variable Interest Entities 2,900,344 3,058,278
Assets of nonconsolidated Variable Interest Entities 2,256,442 1,902,384
Maximum exposure to loss of nonconsolidated Variable Interest Entities 2,256,442 1,902,384
Loans Held-for-Investment, Residential Mortgages [Member]    
Variable Interest Entity [Line Items]    
Assets of consolidated Variable Interest Entities 3,120,410 3,271,317
Commercial Real Estate Assets [Member]    
Variable Interest Entity [Line Items]    
Assets of consolidated Variable Interest Entities 45,888 45,885
Accrued Income Receivable [Member]    
Variable Interest Entity [Line Items]    
Assets of consolidated Variable Interest Entities 18,076 19,090
Assets, Total [Member]    
Variable Interest Entity [Line Items]    
Assets of consolidated Variable Interest Entities 3,184,374 3,336,292
Borrowings [Member]    
Variable Interest Entity [Line Items]    
Liabilities of consolidated Variable Interest Entities 2,880,301 3,037,196
Accrued Liabilities [Member]    
Variable Interest Entity [Line Items]    
Liabilities of consolidated Variable Interest Entities 8,190 8,708
Other Liabilities [Member]    
Variable Interest Entity [Line Items]    
Liabilities of consolidated Variable Interest Entities 11,853 12,374
Liabilities, Total [Member]    
Variable Interest Entity [Line Items]    
Liabilities of consolidated Variable Interest Entities $ 2,900,344 $ 3,058,278