Premises and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Premises and Equipment, Gross	$ 215,543	$ 196,061
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	126,883	122,739
Property, Plant and Equipment, Net	88,660	73,322
Depreciation, Depletion and Amortization, Nonproduction	10,800	9,100	$ 8,600
Property Subject to or Available for Operating Lease, Gross	8,561	9,277
Property Subject to or Available for Operating Lease, Accumulated Depreciation	4,665	3,911
Property Subject to or Available for Operating Lease, Net	3,896	5,366
Operating Leases, Income Statement, Depreciation Expense on Property Subject to or Held-for-lease	1,800	1,300	$ 26
Land [Member]
Property, Plant and Equipment [Line Items]
Premises and Equipment, Gross	22,421	23,520
Building [Member]
Property, Plant and Equipment [Line Items]
Premises and Equipment, Gross	97,351	92,857
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Premises and Equipment, Gross	89,390	74,298
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Premises and Equipment, Gross	$ 6,381	$ 5,386

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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