Investment Securities (Gross Realized Gains and Losses on Debt Securities Available for Sale) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Investments, Debt and Equity Securities [Abstract]
Gross realized gains on sales	$ 29	$ 23	$ 96	$ 193
Gross realized losses on sales	(58)	(1)	(60)	(218)
Net (losses) gains recognized on debt securities available for sale	(29)	22	36	(25)
Impairment expense	$ (7)	$ (22)	$ (65)	$ (408)

Amount of realized gain on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 9
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27357-111563

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Amount of realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), excluding other-than-temporary impairment (OTTI).

+ References

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Amount of realized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), excluding other-than-temporary impairment (OTTI).

+ References

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Other-than-temporary Impairment Loss, Debt and Equity Securities, Available-for-sale

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