Note 12 - Borrowed Funds - Short-term Borrowings (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Short-term borrowings	$ 61,766	$ 26,175
Securities Sold under Agreements to Repurchase [Member]
Short-term borrowings	3,766	5,175
Federal Home Loan Bank of Pittsburgh [Member]
Short-term borrowings	58,000	21,000
Federal Home Loan Bank of Pittsburgh [Member] | Federal Home Loan Bank Advances [Member]
Short-term borrowings	58,000	21,000
Federal Home Loan Bank of Pittsburgh [Member] | Overnight Borrowing [Member]
Short-term borrowings	29,000	21,000
Federal Home Loan Bank of Pittsburgh [Member] | Other Short-term Debt [Member]
Short-term borrowings	$ 29,000	$ 0