Long-Term Borrowings (Long Term Borrowing) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016
Long-term borrowings:
Callable national market repurchase agreements	$ 0	$ 40,000
Junior subordinated debt securities	7,107	6,924
Unamortized debt issuance cost	(27)	(51)
Long-term borrowings	$ 144,019	$ 145,155
Callable national market repurchase agreements, Weighted-Average Rate	0.00%	3.63%
Debt Instrument, Interest Rate, Stated Percentage	0.00%	0.00%
Total long-term borrowings, Weighted-Average Rate	2.04%	2.81%
FHLB putable non-amortizing, fixed rate advances
Long-term borrowings:
Long-term Federal Home Loan Bank Advances	$ 115,000	$ 70,000
Federal Home Loan Bank, Advances, Weighted Average Interest Rate	1.86%	2.49%
Junior subordinated debt securities
Long-term borrowings:
Long-term Federal Home Loan Bank Advances	$ 21,939	$ 28,282
Federal Home Loan Bank, Advances, Weighted Average Interest Rate	2.02%	2.01%
Junior Subordinated Debt [Member]
Long-term borrowings:
Debt, Weighted Average Interest Rate	4.97%	4.48%
Maximum \| FHLB putable non-amortizing, fixed rate advances
Long-term borrowings
FHLB advances, maturities period	10 years
Maximum \| Junior subordinated debt securities
Long-term borrowings
FHLB advances, maturities period	14 years

Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Maturities Period

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Interest rate on the amount to be repaid to the counterparty to the repurchase agreement when the carrying amount (or market value, if higher than the carrying amount) of securities or other assets sold under the repurchase agreement exceeds 10 percent of total assets.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Including both current and noncurrent portions, Federal Home Loan Bank borrowings initially due beyond one year or beyond the normal operating cycle if longer.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of long-term debt (with maturities initially due after one year or beyond the operating cycle if longer) identified as Junior Subordinated Notes, which have a lower priority than senior instruments.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Carrying value as of the balance sheet date of notes payable (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion.

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Amount, after the effects of master netting arrangements, of funds outstanding borrowed in the form of a security repurchase agreement between the entity and another party for the sale and repurchase of identical or substantially the same securities at a date certain for a specified price. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

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