Bank Premises and Equipment - Summary of Bank Premises and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Cost	$ 129,854	$ 134,227
Accumulated Depreciation & Amortization	(57,450)	(59,110)
Net Carrying Value	72,404	75,117
Land	23,359	22,586
Premises
Property, Plant and Equipment [Line Items]
Cost	95,810	95,852
Accumulated Depreciation & Amortization	(30,913)	(28,999)
Net Carrying Value	64,897	66,853
Furniture and Equipment
Property, Plant and Equipment [Line Items]
Cost	34,044	38,375
Accumulated Depreciation & Amortization	(26,537)	(30,111)
Net Carrying Value	$ 7,507	$ 8,264