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Guarantees (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Dec. 31, 2014
Guarantee Obligations [Line Items]          
Losses from repurchased loans subject to credit recourse $ 418 $ 115 $ 1,000 $ 261  
Loss On GNMA Repurchased Loan Not Subject To Credit Recourse 500 979 2,000 1,900  
Funds Advanced To Investors Under Servicing Agreements 305   305   $ 391
Serviced mortgage loans for third parties 625,300   625,300    
Loan with recourse [Member]          
Guarantee Obligations [Line Items]          
Continuing Involvement With Transferred Financial Assets Principal Amount Outstanding 25,000   25,000   67,800
Repurchased GNMA 165 $ 3,400 $ 1,900 $ 5,600 $ 3,400
Losses from repurchased loans subject to credit recourse $ 19,500