Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
|
| Commitments And Contingencies Disclosure [Abstract] | |||
| Weighted average remaining lease term | 30 years 3 months 18 days | ||
| Weighted average discount rate | 4.80% | ||
| Rent expense | $ 1.2 | $ 1.8 | $ 1.7 |