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
Sep. 30, 2015
Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Interest Receivable $ 56,250 $ 65,529
Loans Held-for-sale, Mortgages [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Interest Receivable 3,014 1,997
Loans Held-for-investment, Mortgages [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Interest Receivable 16,016 10,197
Loans Held-for-investment, Commercial Real Estate [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Interest Receivable 626 0
US Treasury Securities [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Interest Receivable 0 8,084
Federal Home Loan Mortgage Corporation Certificates and Obligations (FHLMC) [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Interest Receivable 7,767 8,734
Federal National Mortgage Association Certificates and Obligations (FNMA) [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Interest Receivable 17,117 22,392
Government National Mortgage Association Certificates and Obligations (GNMA) [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Interest Receivable 8,483 10,290
Mortgage-backed Securities, Issued by Private Enterprises [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Interest Receivable 3,227 3,835
Available-for-sale Securities [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Interest Receivable $ 36,594 $ 45,251