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Leases (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Leases [Abstract]    
Additional term of contract 100 years  
Supplemental Statements of Operations Information    
Operating lease costs $ 7,058 $ 6,838
Short-term lease costs 39 39
Variable lease costs 519 436
Total lease costs 7,616 7,313
Operating cash outflows from operating leases 7,066 6,954
ROU assets obtained in exchange for operating lease liabilities 1,174 44,845
ROU assets written off due to lease modifications (1,748) $ 0
Operating Lease Liabilities    
2021 6,261  
2022 6,032  
2023 5,342  
2024 5,249  
2025 4,948  
Thereafter 25,124  
Total future minimum operating lease payments 52,956  
Less: imputed interest $ (14,357)  
Operating Lease, Liability, Statement of Financial Position [Extensible List] us-gaap:OtherLiabilities us-gaap:OtherLiabilities
Operating lease, liability $ 38,599 $ 44,707
ROU asset $ 34,006 $ 39,860
Weighted average remaining lease term 12 years 8 months 12 days 10 years 10 months 24 days
Weighted average discount rate 4.39% 4.30%
Minimum    
Lessee, Lease, Description [Line Items]    
Term of contract 1 year  
Maximum    
Lessee, Lease, Description [Line Items]    
Term of contract 50 years