Summary of Fair Value of Financial Instruments (Narrative) (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Maximum maturity term of financial assets (in days) | 90 days | |
| Indebtedness, Carrying value | $ 1,180,750 | $ 1,128,724 |
| Carrying Value | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Indebtedness, Carrying value | $ 1,172,312 | $ 1,128,724 |
| Minimum | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Total indebtedness fair value variance from carrying value (as a percent) | 87.20% | 78.30% |
| Maximum | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Total indebtedness fair value variance from carrying value (as a percent) | 96.40% | 86.60% |