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Investments - Fair Value of Investments on Deposit with Governmental Authorities - Narrative (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Investments Debt And Equity Securities [Abstract]
Fair values of investments on deposit	$ 7.3	$ 7.6

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- Definition

Carrying amount of cash and investment securities on deposit with state regulatory authorities in connection with capital requirements.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 825
-Section 50
-Paragraph 1A
-URI https://asc.fasb.org/extlink&oid=123600598&loc=SL75763979-209797

+ Details

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Balance Type:	debit
Period Type:	instant

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- References

No definition available.

+ Details

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