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Fair Value Measurements - Quantitative Information, Level 3 (Details) - Nonrecurring $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)
Impaired Loans
Fair value measurements for financial instruments measured at fair value on a non-recurring basis
Collateral-dependent loans	$ 2,242		$ 2,242
Net Losses (Gains) Recorded in Earnings	(39)	$ 0	(662)	$ (10)
Impaired Loans | Branch held for sale
Fair value measurements for financial instruments measured at fair value on a non-recurring basis
Net Losses (Gains) Recorded in Earnings	(38)	$ 0	(38)	$ 0
Branch held for sale
Fair value measurements for financial instruments measured at fair value on a non-recurring basis
Collateral-dependent loans					$ 1,330
Level 3 | Impaired Loans
Fair value measurements for financial instruments measured at fair value on a non-recurring basis
Collateral-dependent loans	$ 2,242		$ 2,242		$ 1,289
Level 3 | Impaired Loans | Minimum | Comparability Adjustment
Fair value measurements for financial instruments measured at fair value on a non-recurring basis
Range of Inputs	(0.200)		(0.200)		(40.1)
Level 3 | Impaired Loans | Maximum | Comparability Adjustment
Fair value measurements for financial instruments measured at fair value on a non-recurring basis
Range of Inputs	0.550		0.550		0.6
Level 3 | Impaired Loans | Weighted Average | Comparability Adjustment
Fair value measurements for financial instruments measured at fair value on a non-recurring basis
Range of Inputs	0.096		0.096		(24.1)
Level 3 | Branch held for sale
Fair value measurements for financial instruments measured at fair value on a non-recurring basis
Collateral-dependent loans	$ 805		$ 805		$ 1,330
Level 3 | Branch held for sale | Minimum | Comparability Adjustment
Fair value measurements for financial instruments measured at fair value on a non-recurring basis
Range of Inputs	(0.260)		(0.260)		40.3
Level 3 | Branch held for sale | Maximum | Comparability Adjustment
Fair value measurements for financial instruments measured at fair value on a non-recurring basis
Range of Inputs	0.518		0.518		140.7
Level 3 | Branch held for sale | Weighted Average | Comparability Adjustment
Fair value measurements for financial instruments measured at fair value on a non-recurring basis
Range of Inputs	0.064		0.064		33.2

X

- Definition

Amount of net gains and losses recorded in earnings for nonrecurring assets reported at fair value

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- Definition

Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-URI http://asc.fasb.org/subtopic&trid=2196772

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