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Lease - Future Minimum Lease Payments under Non-cancellable Operating Leases (Details)
$ in Thousands
Dec. 31, 2020
USD ($)
Leases [Abstract]  
2021 $ 7,682
2022 6,297
2023 5,535
2024 5,148
2025 4,900
Thereafter 13,136
Total future minimum lease payments 42,698
Less: imputed interest (9,273)
Total $ 33,425
Operating Lease, Liability, Statement of Financial Position [Extensible List] us-gaap:OperatingLeaseLiabilityCurrent us-gaap:OperatingLeaseLiabilityNoncurrent