Fair Value - Narratives (Details) - USD ($)	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans carrying amount	$ 270,000
other real estate owned with an allowance at carrying value before valuation allowance	0	$ 1,200,000
Impaired loans, valuation allowance	27,000
Provision for Loan and Lease Losses	0	26,000
Other real estate owned at carrying value	1,226,000	2,351,000	$ 3,895,000
Real Estate Acquired Through Foreclosure Fair Value	0	900,000
Real Estate Owned, Valuation Allowance, Valuation Increase	27,000	333,000
Other Real Estate, Valuation Adjustments	27,000	333,000
Fair value of mortgage servicing rights	$ 420,000	513,000
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Real Estate Acquired Through Foreclosure Fair Value		916,000
Fair Value, Measurements, Nonrecurring [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Real Estate Acquired Through Foreclosure Fair Value		$ 916,000

-- None. No documentation exists for this element. --

No definition available.

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-- None. No documentation exists for this element. --

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-- None. No documentation exists for this element. --

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No definition available.

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- Definition

other real estate owned with an allowance at carrying value before valuation allowance

+ References

No definition available.

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- Definition

Real estate acquired through foreclosure fair value.

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No definition available.

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Amount of increase (decrease) of allowance reserve for credit loss.

+ References

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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.

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Valuation adjustments made to other real estate not separately disclosed, including, but not limited to, real estate investments, real estate loans that qualify as investments in real estate, and premises that are no longer used in operations may also be included in real estate owned. This excludes real estate assets taken in settlement of troubled loans through surrender or foreclosure.

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Amount of gain recognized in the income statement for an increase in valuation of real estate owned (REO).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.10(4))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 35
-Paragraph 40
-URI http://asc.fasb.org/extlink&oid=29634951&loc=d3e1720-110224

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- Definition

Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6469459&loc=d3e122501-111745

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-Topic 860
-SubTopic 50
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=68078379&loc=d3e122625-111746

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