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Investment Securities (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Marketable Securities [Line Items]
Amortized Cost	$ 279,680	$ 283,648
Gross Unrealized Gains	13,973	4,153
Gross Unrealized Losses	181	1,001
Fair Value	293,472	286,800
US Treasury Securities [Member]
Marketable Securities [Line Items]
Amortized Cost	1,503	7,190
Gross Unrealized Gains	7	16
Gross Unrealized Losses	0	3
Fair Value	1,510	7,203
US Government-sponsored Enterprises Debt Securities [Member]
Marketable Securities [Line Items]
Amortized Cost	993	984
Gross Unrealized Gains	17	17
Gross Unrealized Losses	0	0
Fair Value	1,010	1,001
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Marketable Securities [Line Items]
Amortized Cost	171,441	182,736
Gross Unrealized Gains	7,763	1,490
Gross Unrealized Losses	154	640
Fair Value	179,050	183,586
Small Business Administration pools [Member]
Marketable Securities [Line Items]
Amortized Cost	36,369	45,301
Gross Unrealized Gains	922	259
Gross Unrealized Losses	19	217
Fair Value	37,272	45,343
US States and Political Subdivisions Debt Securities [Member]
Marketable Securities [Line Items]
Amortized Cost	66,101	47,418
Gross Unrealized Gains	5,254	2,371
Gross Unrealized Losses	0	141
Fair Value	71,355	49,648
Corporate and other securities [Member]
Marketable Securities [Line Items]
Amortized Cost	3,273	19
Gross Unrealized Gains	10	0
Gross Unrealized Losses	8	0
Fair Value	$ 3,275	$ 19

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- Definition

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

+ References

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- Definition

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- Definition

Amount of unrealized gain before deducting unrealized loss on investments in debt and equity securities classified as available-for-sale securities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563

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Amount of unrealized loss before deducting unrealized gain on investments in available-for-sale securities.

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-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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