Loans Held for Sale Narrative (Details) - USD ($)	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Loans Held for Sale [Line Items]
Disposal Group, Including Discontinued Operation, Mortgage Loans	$ 4,148,000	$ 10,413,000
Loans Held-for-sale, Mortgages, Contractual Balance	4,100,000	10,300,000
Expected Gain (Loss) on Sale of Mortgage Loans	55,000	$ 131,000
Commercial Portfolio Segment [Member]
Loans Held for Sale [Line Items]
Loans held for sale - lower of cost or market	$ 0		$ 100,000
Gain on sale of loans in secondary market			$ 800,000

The gains (losses) included in earnings that represent the difference between the sale price and the carrying value of loans and leases that were sold during the reporting period. This element refers to the gain (loss) and not to the cash proceeds of the sales. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 24
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3521-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585

Name:	us-gaap_GainLossOnSaleOfLoansAndLeases
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration