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Fair Value Measurements - Quantitative Information, Level 3 (Details) - Nonrecurring $ in Thousands	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Fair value measurements for financial instruments measured at fair value on a non-recurring basis
Collateral-dependent loans	$ 2,619
Level 3
Fair value measurements for financial instruments measured at fair value on a non-recurring basis
Collateral-dependent loans	2,619
Impaired Loans
Fair value measurements for financial instruments measured at fair value on a non-recurring basis
Collateral-dependent loans		$ 3,380
Impaired Loans | Level 3
Fair value measurements for financial instruments measured at fair value on a non-recurring basis
Collateral-dependent loans	$ 1,289	$ 3,380
Impaired Loans | Level 3 | Comparability Adjustment | Minimum
Fair value measurements for financial instruments measured at fair value on a non-recurring basis
Range of Inputs	(40.1)	(18.5)
Impaired Loans | Level 3 | Comparability Adjustment | Maximum
Fair value measurements for financial instruments measured at fair value on a non-recurring basis
Range of Inputs	0.6	173.5
Impaired Loans | Level 3 | Comparability Adjustment | Weighted Average
Fair value measurements for financial instruments measured at fair value on a non-recurring basis
Range of Inputs	(24.1)	36.8
Branch held for sale
Fair value measurements for financial instruments measured at fair value on a non-recurring basis
Collateral-dependent loans	$ 1,330
Branch held for sale | Level 3
Fair value measurements for financial instruments measured at fair value on a non-recurring basis
Collateral-dependent loans	$ 1,330
Branch held for sale | Level 3 | Comparability Adjustment | Minimum
Fair value measurements for financial instruments measured at fair value on a non-recurring basis
Range of Inputs	40.3
Branch held for sale | Level 3 | Comparability Adjustment | Maximum
Fair value measurements for financial instruments measured at fair value on a non-recurring basis
Range of Inputs	140.7
Branch held for sale | Level 3 | Comparability Adjustment | Weighted Average
Fair value measurements for financial instruments measured at fair value on a non-recurring basis
Range of Inputs	33.2

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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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