Leases - Cash Payments Included in Measurement of Lease liabilities (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2020 |
Dec. 31, 2019 |
|
| Finance leases | ||
| Operating cash flows included in operating activities | $ 254 | $ 307 |
| Financing cash flows included in payments under finance lease obligations | 1,715 | 1,964 |
| Operating leases | ||
| Operating cash flows (fixed payments) included in other operating activities, net | 4,988 | 5,092 |
| Operating cash flows (liability reduction) included in other operating activities, net | $ 3,856 | $ 5,404 |