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Fair Value of Assets and Liabilities - Valuation Technique (Details) - Level 3 $ in Thousands	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Impaired loans | Appraisal value | Property specific adjustment
Valuation techniques and significant unobservable inputs
Impaired loans	$ 7,325	$ 4,816
Foreclosed assets | Appraisal value | Property specific adjustment
Valuation techniques and significant unobservable inputs
Foreclosed assets	$ 63	$ 8
Servicing rights
Valuation techniques and significant unobservable inputs
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Servicing rights | Prepayment speed assumptions
Valuation techniques and significant unobservable inputs
Servicing rights	$ 1,987	$ 3,845
Servicing rights | Prepayment speed assumptions | Minimum
Valuation techniques and significant unobservable inputs
Servicing Asset, Measurement Input	191	123
Servicing rights | Prepayment speed assumptions | Maximum
Valuation techniques and significant unobservable inputs
Servicing Asset, Measurement Input	403	267
Servicing rights | Prepayment speed assumptions | Weighted average
Valuation techniques and significant unobservable inputs
Servicing Asset, Measurement Input	285	194
Servicing rights | Discount rate
Valuation techniques and significant unobservable inputs
Servicing Asset, Measurement Input	0.090	0.094
Servicing rights | Discount rate | Weighted average
Valuation techniques and significant unobservable inputs
Servicing Asset, Measurement Input	0.090	0.094

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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
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