Employee Benefit Plans - Supplemental Life Insurance (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
|
| Net periodic benefit cost: | |||
| Accrual for benefit obligation for following year | $ 53 | ||
| Supplemental Life Insurance Benefit | |||
| Other Post Retirement Benefit Plan Disclosures [Line Items] | |||
| Benefit obligation at beginning of year | 2,631 | $ 2,424 | $ 2,084 |
| Net periodic benefit cost: | |||
| Service cost | (23) | (21) | (16) |
| Interest cost | 83 | 87 | 95 |
| Actuarial loss (gain) | (71) | 141 | 261 |
| Total net period cost | (11) | 207 | 340 |
| Benefit obligation at end of year | 2,620 | 2,631 | 2,424 |
| Accrued liability as of December 31 | $ (2,620) | $ (2,631) | $ (2,424) |
| Discount rate used for benefit obligation | 3.25% | 3.25% | 4.00% |
| Accrual for benefit obligation for following year | $ 117 | ||