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Fair Value Measurements Fair value Option, Disclosures (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Fair Value, Option, Quantitative Disclosures [Line Items]    
Loans Held-for-sale, Fair Value Disclosure $ 14,000 $ 35,750
Loans held for sale (valued under fair value option $14,000 and $35,750) 14,012 36,053
Fair Value, Option, Loans Held as Assets, Aggregate Difference 489 564
loans held for sale [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Loans held for sale (valued under fair value option $14,000 and $35,750) $ 13,511 $ 35,186