Quarterly report pursuant to Section 13 or 15(d)

Derivative Instruments and Hedging Activities Commitments to Purchase Residential Mortgage Loans Held-for-Sale (Details)

v3.5.0.2
Derivative Instruments and Hedging Activities Commitments to Purchase Residential Mortgage Loans Held-for-Sale (Details) - USD ($)
$ in Thousands
Sep. 30, 2016
Jun. 30, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Dec. 31, 2014
Derivative [Line Items]            
Derivative, Notional Amount $ 22,062,904 $ 26,141,370 $ 21,998,381 $ 28,317,580 $ 27,401,335 $ 48,115,523
Loan Purchase Commitments [Member]            
Derivative [Line Items]            
Derivative, Notional Amount 61,403 $ 636,467 286,120 $ 501,192 $ 626,660 $ 554,838
Derivative Financial Instruments, Assets [Member]            
Derivative [Line Items]            
Derivative, Notional Amount 16,759,324   21,735,997      
Derivative, Fair Value, Net 199,013   271,509      
Derivative Financial Instruments, Assets [Member] | Loan Purchase Commitments [Member]            
Derivative [Line Items]            
Derivative, Notional Amount 46,134   98,736      
Derivative, Fair Value, Net 310   77      
Derivative Financial Instruments, Liabilities [Member]            
Derivative [Line Items]            
Derivative, Notional Amount 9,221,580   1,362,384      
Derivative, Fair Value, Net (39,918)   (7,285)      
Derivative Financial Instruments, Liabilities [Member] | Loan Purchase Commitments [Member]            
Derivative [Line Items]            
Derivative, Notional Amount 15,269   187,384      
Derivative, Fair Value, Net $ (40)   $ (427)