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Note 15 - Subsequent Event (Details Textual) - USD ($)
Jul. 23, 2018
Jun. 30, 2018
Dec. 31, 2017
Assets, Total   $ 1,631,962,000 $ 1,673,872,000
Merger [Member] | Subsequent Event [Member]      
Business Combination, Rights to Stockholders Upon Merger 1.053    
Business Combination, Rights to Stockholders, Cash Received per Share $ 5    
Business Combination, Consideration Transferred, Total $ 378,200,000    
Business Combination, Contingent Consideration, Merger Agreement Termination Fee $ 12,000,000    
WesBanco [Member]      
Assets, Total   $ 10,900,000,000