Fair Value - Loans Held For Sale (Details) - USD ($) $ in Thousands |
Dec. 31, 2018 |
Dec. 31, 2017 |
|---|---|---|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Loans held for sale | $ 18,526 | $ 26,344 |
| Aggregate fair value | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Loans held for sale | 18,526 | 26,344 |
| Contractual principal | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Loans held for sale | 17,822 | 25,637 |
| Difference | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Loans held for sale | $ 704 | $ 707 |