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Leases - Maturities of our operating leases (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Maturities of operating leases    
2022 $ 3,040  
2023 2,599  
2024 1,823  
2025 1,693  
2026 1,629  
Later years 4,352  
Less imputed interest (2,480)  
Total lease liabilities $ 12,656 $ 15,254