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Commitments and Contingencies - Leases (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Operating leases rental expenses |  |  |
Lease costs | $ 3,957 | $ 3,447 | $ 2,612
Other Operating Lease Information |  |  |
Weighted-Average Remaining Lease Term | 7 years 10 months 24 days | 8 years 8 months 12 days |
Weighted-Average Discount Rate | 2.80% | 2.90% |
Future lease obligations under our operating leases |  |  |
2022 | $ 3,140 |  |
2023 | 2,851 |  |
2024 | 2,745 |  |
2025 | 2,372 |  |
2026 | 1,806 |  |
Thereafter | 8,084 |  |
Total lease payments | 20,998 |  |
Less: imputed interest | (2,275) |  |
Operating lease liabilities | $ 18,723 | $ 19,166 |

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