Investment Securities - Narratives (Details) |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2020
USD ($)
security
|
Dec. 31, 2019
USD ($)
security
|
Dec. 31, 2018
USD ($)
|
|
| Investments, Debt and Equity Securities [Abstract] | |||
| Proceeds from sales of securities | $ 0 | ||
| Net gain on sale of available for sale securities | 0 | $ 76,000 | $ 222,000 |
| Available for sale debt securities, realized loss | 17,000.0 | ||
| Marketable equity securities, at fair value | 2,207,000 | 2,118,000 | |
| Marketable equity securities, cost | $ 2,100,000 | $ 2,000,000.0 | |
| Number of available for sales debt securities in continuous loss position (positions) | security | 0 | 2 | |