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Note 4 - Premises and Equipment, Net - Summary of Premises and Equipment (Details) - USD ($) | Mar. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Property, plant and equipment, gross | $ 84,414,000 | $ 81,699,000
Less: accumulated depreciation | 34,305,000 | 33,378,000
Premises and equipment, net | 50,109,000 | 48,321,000
Land and Land Improvements [Member] |  |
Property, plant and equipment, gross | 18,140,000 | 18,198,000
Building [Member] |  |
Property, plant and equipment, gross | 53,983,000 | 45,362,000
Furniture and Fixtures [Member] |  |
Property, plant and equipment, gross | $ 12,291,000 | $ 18,139,000

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