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Operating Leases - Maturities of Lease Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Leases [Abstract]    
2021 $ 4,176  
2022 3,924  
2023 3,771  
2024 3,793  
2025 3,859  
2026 and thereafter 32,548  
Total lease payments 52,071  
Less: imputed interest 11,787  
Operating lease liabilities $ 40,284 $ 45,258