Quarterly report pursuant to Section 13 or 15(d)

Accrued Interest Receivable Schedule of Accounts, Notes, Loans and Financing Receivable (Details)

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Accrued Interest Receivable Schedule of Accounts, Notes, Loans and Financing Receivable (Details) - USD ($)
$ in Thousands
Mar. 31, 2016
Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Interest Receivable $ 54,517 $ 49,970
Loans Held-for-sale, Residential Mortgages [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Interest Receivable 1,732 4,173
Loans Held-for-investment, Residential Mortgages [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Interest Receivable 20,534 18,339
Commercial Real Estate Assets [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Interest Receivable 1,941 1,567
Federal Home Loan Mortgage Corporation Certificates and Obligations (FHLMC) [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Interest Receivable 5,894 6,235
Federal National Mortgage Association Certificates and Obligations (FNMA) [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Interest Receivable 19,046 12,407
Government National Mortgage Association Certificates and Obligations (GNMA) [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Interest Receivable 3,181 4,910
Mortgage-backed Securities, Issued by Private Enterprises [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Interest Receivable 2,189 2,339
Available-for-sale Securities [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Interest Receivable $ 30,310 $ 25,891