Fair Value of Financial Instruments - Quantitative Information About Level III Significant Unobservable Inputs (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Non-recurring \| Impaired loans
Quantitative Information about Level III Fair Value Measurements
Fair value	$ 13,836	$ 14,368
Non-recurring \| Impaired loans \| Level I
Quantitative Information about Level III Fair Value Measurements
Fair value	0	0
Non-recurring \| Impaired loans \| Level II
Quantitative Information about Level III Fair Value Measurements
Fair value	0	0
Non-recurring \| Impaired loans \| Level III
Quantitative Information about Level III Fair Value Measurements
Fair value	$ 13,836	$ 14,368
Non-recurring \| Impaired loans \| Appraisal of collateral \| Level III \| Minimum
Unobservable Input
Appraisal adjustments	20.00%	20.00%
Liquidation expense	5.00%	5.00%
Non-recurring \| Impaired loans \| Appraisal of collateral \| Level III \| Maximum
Unobservable Input
Appraisal adjustments	62.00%	62.00%
Liquidation expense	10.00%	10.00%
Non-recurring \| Other real estate owned
Quantitative Information about Level III Fair Value Measurements
Fair value	$ 1,910	$ 1,346
Non-recurring \| Other real estate owned \| Level I
Quantitative Information about Level III Fair Value Measurements
Fair value	0	0
Non-recurring \| Other real estate owned \| Level II
Quantitative Information about Level III Fair Value Measurements
Fair value	0	0
Non-recurring \| Other real estate owned \| Level III
Quantitative Information about Level III Fair Value Measurements
Fair value	$ 1,910	$ 1,346
Non-recurring \| Other real estate owned \| Appraisal of collateral \| Level III \| Minimum
Unobservable Input
Appraisal adjustments	20.00%	20.00%
Liquidation expense	5.00%	5.00%
Non-recurring \| Other real estate owned \| Appraisal of collateral \| Level III \| Maximum
Unobservable Input
Appraisal adjustments	30.00%	30.00%
Liquidation expense	10.00%	10.00%
Recurring \| Municipal Bonds \| Level III
Quantitative Information about Level III Fair Value Measurements
Fair value	$ 22,571	$ 22,909
Recurring \| Municipal Bonds \| Appraisal of bond \| Level III \| Minimum
Unobservable Input
Pull through rates	5.00%	5.00%
Recurring \| Municipal Bonds \| Appraisal of bond \| Level III \| Maximum
Unobservable Input
Pull through rates	15.00%	15.00%
Recurring \| Interest rate lock commitment \| Level III
Quantitative Information about Level III Fair Value Measurements
Fair value	$ 2,312	$ 1,426
Recurring \| Interest rate lock commitment \| Pricing model \| Level III \| Minimum
Unobservable Input
Pull through rates	80.00%	73.00%
Recurring \| Interest rate lock commitment \| Pricing model \| Level III \| Maximum
Unobservable Input
Pull through rates	83.00%	85.00%

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- Definition

Represents the liquidation expenses as a percentage of appraisal, used as an input to measure fair value.

+ References

No definition available.

+ Details

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- Definition

Fair Value Inputs, Pull Through Rate

+ References

No definition available.

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- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

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- References

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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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