Investments - Narrative (Details) |
12 Months Ended | |
|---|---|---|
|
Dec. 31, 2020
USD ($)
security
item
|
Dec. 31, 2019
USD ($)
item
|
|
| Investments, Debt and Equity Securities [Abstract] | ||
| Investments with unrealized losses of less than one year | item | 21 | 13 |
| Investments with unrealized losses of more than one year | item | 1 | 10 |
| Number of securities pledged and held at FHLB | 7 | 7 |
| Pledged securities for FHLB | $ 8,800,000 | $ 7,400,000 |
| Public deposits | 13,200,000 | 10,300,000 |
| Collateral requirement | 5,300,000 | 4,000,000.0 |
| Other than temporary impairment losses, investments | $ 0 | $ 0 |