Securities - Securities in Unrealized Loss Position (Details) $ in Thousands	Sep. 30, 2020 USD ($) security	Dec. 31, 2019 USD ($) security
Available for sale at fair value:
Available for sale, Total number in a loss position \| security	11	18
Available for sale, Less than 12 months Estimated fair value	$ 3,769	$ 7,073
Available for sale, Less than 12 months, Unrealized loss	(52)	(40)
Available for sale, 12 Months and greater Estimated fair value	9,560	11,739
Available for sale, 12 Months and greater Unrealized loss	(1,022)	(348)
Available for sale, Estimated fair value	13,329	18,812
Available for sale, Unrealized loss	$ (1,074)	$ (388)
U.S. Government sponsored entities
Available for sale at fair value:
Available for sale, Total number in a loss position \| security		1
Available for sale, 12 Months and greater Estimated fair value		$ 1,995
Available for sale, 12 Months and greater Unrealized loss		(2)
Available for sale, Estimated fair value		1,995
Available for sale, Unrealized loss		$ (2)
State and political subdivisions
Available for sale at fair value:
Available for sale, Total number in a loss position \| security		1
Available for sale, 12 Months and greater Estimated fair value		$ 1,013
Available for sale, 12 Months and greater Unrealized loss		(12)
Available for sale, Estimated fair value		1,013
Available for sale, Unrealized loss		$ (12)
Residential mortgage-backed securities
Available for sale at fair value:
Available for sale, Total number in a loss position \| security	2	10
Available for sale, Less than 12 months Estimated fair value		$ 3,707
Available for sale, Less than 12 months, Unrealized loss		(27)
Available for sale, 12 Months and greater Estimated fair value	$ 321	4,996
Available for sale, 12 Months and greater Unrealized loss	(4)	(79)
Available for sale, Estimated fair value	321	8,703
Available for sale, Unrealized loss	$ (4)	$ (106)
Corporate and other securities
Available for sale at fair value:
Available for sale, Total number in a loss position \| security	9	6
Available for sale, Less than 12 months Estimated fair value	$ 3,769	$ 3,366
Available for sale, Less than 12 months, Unrealized loss	(52)	(13)
Available for sale, 12 Months and greater Estimated fair value	9,239	3,735
Available for sale, 12 Months and greater Unrealized loss	(1,018)	(255)
Available for sale, Estimated fair value	13,008	7,101
Available for sale, Unrealized loss	$ (1,070)	$ (268)

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 50
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-URI http://asc.fasb.org/extlink&oid=118955579&loc=SL82922890-210455

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-Publisher FASB
-Name Accounting Standards Codification
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Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

+ References

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- Definition

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27337-111563

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Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

+ References

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position without allowance for credit loss.

+ References

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Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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