Loans (Narrative) (Details) - USD ($)	12 Months Ended
Dec. 31, 2016	Dec. 31, 2015
Loans
Percentage Growth in Loans and Leases Receivable, Net of Deferred Income	7.00%
Growth in Loans and Leases Receivable, Net of Deferred Income	$ 152,500,000
Additional commitments to lend funds to debtors whose terms have been modified in a TDR	0
Residential real estate
Loans
Pledged commercial and residential loans to secure borrowings from FHLB and FRB	542,500,000	$ 554,800,000
Commerical Loans
Loans
Pledged commercial and residential loans to secure borrowings from FHLB and FRB	$ 152,000,000	$ 195,500,000
Commercial Real Estate [Member]
Loans
Percentage Growth in Loans and Leases Receivable, Net of Deferred Income	8.00%
Consumer, other
Loans
Percentage Growth in Loans and Leases Receivable, Net of Deferred Income	7.00%
Consumer, Indirect Loan [Member]
Loans
Percentage Growth in Loans and Leases Receivable, Net of Deferred Income	51.00%
Growth in Loans and Leases Receivable, Net of Deferred Income	$ 85,700,000
Commerical Loans
Loans
Percentage Growth in Loans and Leases Receivable, Net of Deferred Income	20.00%
Growth in Loans and Leases Receivable, Net of Deferred Income	$ 70,600,000

Growth in Loans and Leases Receivable, Net of Deferred Income

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- Definition

Percentage Growth in Loans and Leases Receivable, Net of Deferred Income

+ References

No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Reflects the unfunded portion of contractual agreements to lend funds to borrowers for loans whose terms have been modified by troubled debt restructuring.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 40
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=25495931&loc=d3e18794-111554

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- Definition

The fair value, as of the date of each statement of financial position presented, of loans which are owned but transferred to serve as collateral for the payment of the related debt obligation primarily arising from secured borrowings and repurchase agreements, and that are reclassified and separately reported in the statement of financial position because the transferee has the right by contract or custom to sell or re-pledge them.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6467456&loc=d3e113888-111728

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