Loans and Allowance for Loan Losses - Narrative (Details) - USD ($)	Sep. 30, 2017	Dec. 31, 2016
Financing Receivable, Modifications [Line Items]
Loans on nonaccrual	$ 1,260,000	$ 1,415,000
Trouble Debt Restructuring [Member]
Financing Receivable, Modifications [Line Items]
Loans that met criteria for restructured	42,000	608,000
Loans on nonaccrual	$ 0	$ 442,000

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.

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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- Definition

The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 40
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=82895541&loc=d3e18845-111554

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	debit
Period Type:	instant

- Definition

Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5111-111524

+ Details

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Data Type:	xbrli:monetaryItemType
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Period Type:	instant

- Details

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