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Fair Value of Assets and Liabilities - Other investments (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Fair Value of Assets and Liabilities
Fair value of investment in Other investments companies	$ 2,230,000		$ 2,230,000		$ 2,160,000
Unrealized gains or losses	31,000	$ (5,000)	145,000	$ 19,000
Other income			3,510,000
Other income net of tax					$ 3,650,000
Unrealized gains from change in fair value of investments	$ 83,000		$ (140,000)

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Amount of other income net of tax.

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Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 45
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Amount of unrealized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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-SubTopic 220
-Section S99
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Amount of revenue and income classified as other.

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Amount of unrealized gain (loss) on investment.

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