Leases - Summary (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Finance Leases
ROU assets	$ 5,999	$ 5,999
Accumulated depreciation	$ (457)	$ (273)
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Property, Plant, And Equipment And Lease Right Of Use Asset, After Accumulated Depreciation And Amortization	Property, Plant, And Equipment And Lease Right Of Use Asset, After Accumulated Depreciation And Amortization
Net ROU assets	$ 5,542	$ 5,726
Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Other Borrowings	Other Borrowings
Lease liabilities	$ 5,810	$ 5,891
Operating Leases
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Property, Plant, And Equipment And Lease Right Of Use Asset, After Accumulated Depreciation And Amortization	Property, Plant, And Equipment And Lease Right Of Use Asset, After Accumulated Depreciation And Amortization
Net ROU assets	$ 44,480	$ 46,820
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Other Liabilities	Other Liabilities
Lease liabilities	$ 47,590	$ 49,675
Finance lease, weighted average remaining lease term	23 years	24 years
Finance lease, weighted average discount rate	2.60%	2.60%
Operating lease, weighted average remaining lease term	17 years	17 years
Operating lease, weighted average discount rate	3.50%	3.40%