v3.8.0.1

Allowance for Loan Losses - Weighted Average Annualized Balance of Recorded Investment and Interest Income on Impaired Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Financing Receivable Modifications [Line Items]
Average Recorded Investment	$ 9,229	$ 5,899	$ 14,469
Interest Income after Impairment	75	51	677
Residential Properties
Financing Receivable Modifications [Line Items]
Average Recorded Investment	1,323	1,970	27
Interest Income after Impairment	20	14	2
Commercial Real Estate
Financing Receivable Modifications [Line Items]
Average Recorded Investment	2,403	2,252	6,487
Interest Income after Impairment	50	17	281
Commercial and Industrial Loans
Financing Receivable Modifications [Line Items]
Average Recorded Investment	5,503	1,673	7,850
Interest Income after Impairment	$ 5	20	394
Consumer Loans
Financing Receivable Modifications [Line Items]
Average Recorded Investment		$ 4	$ 105

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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

Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5212-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5258-111524

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- Definition

Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5212-111524

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