Long-Term Borrowings (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Callable national market repurchase agreements	$ 40,000	$ 40,000
Weighted- Average Rate	3.63%	3.63%
Junior subordinated debt securities	$ 7,061	$ 6,924
Unamortized debt issuance costs	(33)	(51)
Total long-term borrowings	$ 195,890	$ 145,155
Long-term borrowings, Weighted-Average Rate	2.43%	2.81%
Federal Home Loan Bank Advances, Fixed Rate, Putable Non-amortizing [Member]
Debt Instrument [Line Items]
FHLB Advances	$ 125,000	$ 70,000
Federal Home Loan Bank, Advances, Weighted Average Interest Rate	2.00%	2.49%
Federal Home Loan Bank Advances, Fixed Rate, Amortizing [Member]
Debt Instrument [Line Items]
FHLB Advances	$ 23,862	$ 28,282
Federal Home Loan Bank, Advances, Weighted Average Interest Rate	2.03%	2.01%
Junior Subordinated Debt [Member]
Debt Instrument [Line Items]
Weighted- Average Rate	4.78%	0.00%

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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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section S99
-Paragraph 1
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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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Weighted average interest rate on advances made and reported by Federal Home Loan Bank (FHLBank).

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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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Weighted average interest rate of long-term debt outstanding calculated at point in time.

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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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The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

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