Loan Sales And Mortgage Servicing Rights - Additional Information (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
|
| Loan Sales And Mortgage Servicing Rights [Line Items] | |||
| Gain on sale of securitization loans | $ 7,029 | $ 7,812 | $ 2,935 |
| Mortgage servicing rights | 4,800 | 2,200 | |
| Freddie Mac | |||
| Loan Sales And Mortgage Servicing Rights [Line Items] | |||
| Payments related to closing of swap position | 2,400 | ||
| Increased pricing on the loan sale | 2,200 | ||
| FFB | |||
| Loan Sales And Mortgage Servicing Rights [Line Items] | |||
| Sale of multifamily loans through securitization | 453,000 | 41,000 | |
| Gain on sale of securitization loans | 7,000 | 600 | |
| Fair value of beneficial interest | 900 | ||
| Mortgage servicing rights | 4,800 | 2,200 | |
| Loans serviced for others | 745,000 | 412,000 | |
| Servicing fees earned on loans | $ 700 | 300 | 0 |
| FFB | Freddie Mac | |||
| Loan Sales And Mortgage Servicing Rights [Line Items] | |||
| Sale of multifamily loans through securitization | 265,000 | 102,000 | |
| Gain on sale of securitization loans | $ 7,200 | $ 2,700 | |