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Note 4 - Premises and Equipment, Net - Summary of Premises and Equipment (Details) - USD ($) | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Property, plant and equipment, gross | $ 92,738,000 | $ 94,169,000
Less: accumulated depreciation | 34,488,000 | 35,210,000
Premises and equipment, net | 58,250,000 | 58,959,000
Land and Land Improvements [Member] |  |
Property, plant and equipment, gross | 14,553,000 | 16,533,000
Building [Member] |  |
Property, plant and equipment, gross | 55,718,000 | 56,114,000
Furniture and Fixtures [Member] |  |
Property, plant and equipment, gross | $ 22,467,000 | $ 21,522,000

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