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Leases - Balance Sheet Details and Components of Lease Expense (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Leases [Abstract]      
Operating lease right of use assets (included in Accrued interest receivable and other assets) $ 23,732 $ 21,667  
Operating lease liabilities (included in Accrued expenses and other liabilities) 25,691 23,445  
Finance lease liabilities (included in Accrued expenses and other liabilities) $ 2,852 $ 3,148  
Weighted average remaining lease term (years) - operating leases 9 years 5 months 19 days 9 years 2 months 19 days  
Weighted average discount rate - operating leases 2.89% 3.44%  
Lease expense:      
Operating lease expense $ 4,553 $ 4,680 $ 4,716
Other lease expense 369 265 245
Total lease expense 4,922 4,945 4,961
Right of use assets obtained in exchange for new operating lease liabilities $ 5,776 $ 1,338 $ 1,256
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] Accrued interest receivable and other assets Accrued interest receivable and other assets  
Operating Lease, Liability, Statement of Financial Position [Extensible List] Accrued expenses and other liabilities Accrued expenses and other liabilities  
Finance Lease, Liability, Statement of Financial Position [Extensible List] Accrued expenses and other liabilities Accrued expenses and other liabilities