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Investments - Credit Quality Indicator (Details)	Sep. 30, 2023 USD ($)
AAA/AA/A
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total debt securities held-to-maturity	$ 238,467
AAA/AA/A | Obligations of states and political subdivisions
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total debt securities held-to-maturity	192,056
AAA/AA/A | Private label mortgage and asset backed securities
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total debt securities held-to-maturity	46,411
AAA/AA/A | Corporate debt securities
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total debt securities held-to-maturity	0
BBB
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total debt securities held-to-maturity	30,163
BBB | Obligations of states and political subdivisions
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total debt securities held-to-maturity	0
BBB | Private label mortgage and asset backed securities
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total debt securities held-to-maturity	0
BBB | Corporate debt securities
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total debt securities held-to-maturity	30,163
Unrated
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total debt securities held-to-maturity	24,427
Unrated | Obligations of states and political subdivisions
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total debt securities held-to-maturity	0
Unrated | Private label mortgage and asset backed securities
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total debt securities held-to-maturity	8,532
Unrated | Corporate debt securities
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total debt securities held-to-maturity	$ 15,895

X

- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-5

+ Details

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X

- Definition

Amount excluding accrued interest, before allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479344/326-20-45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3B
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-3B

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-5

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