Quarterly report pursuant to Section 13 or 15(d)

Fair Value by Balance Sheet Grouping (Details)

v3.3.0.814
Fair Value by Balance Sheet Grouping (Details) - USD ($)
$ in Thousands
Sep. 30, 2015
Jun. 30, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Dec. 31, 2013
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Available-for-sale Securities $ 11,433,195   $ 14,341,102      
Trading Securities 0   1,997,656      
Residential mortgage loans held-for-sale, at fair value 768,008   535,712      
Residential mortgage loans held-for-investment in securitization trusts, at fair value 2,978,586   1,744,746      
Commercial real estate loans held-for-investment 290,910 $ 45,605 0 $ 0 $ 0 $ 0
Mortgage servicing rights 447,345 $ 437,576 452,006 498,466 $ 500,490 514,402
Cash and Cash Equivalents, at Carrying Value 811,839   1,005,792 $ 1,225,281   $ 1,025,487
Restricted Cash and Cash Equivalents 384,029   336,771      
Derivative Asset, Fair Value, Gross Asset 296,731   380,791      
Federal Home Loan Bank stock 153,650   100,010      
Cost Method Investments 3,000   3,000      
Securities Sold under Agreements to Repurchase 7,982,928   12,932,463      
Collateralized borrowings in securitization trust, at fair value 1,990,769   1,209,663      
Federal Home Loan Bank advances 3,710,000   2,500,000      
Derivative Liability, Fair Value, Gross Liability 81,473   90,233      
Federal Home Loan Bank of Des Moines [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Federal Home Loan Bank stock 153,650   100,010      
Federal Home Loan Bank advances $ 3,710,000   $ 2,500,000