Investments - Disposition of Fixed Income and Equity Securities (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
SALES \| Equity Securities
Summary of the disposition of fixed income and equity securities
Proceeds From Sales	$ 15,726	$ 47,638
Gross Realized Gains	5,901	14,233
Gross Realized Losses		(1,150)
Net Realized Gain (Loss)	5,901	13,083
SALES \| Fixed Income Securities \| Available for sale securities
Summary of the disposition of fixed income and equity securities
Proceeds From Sales	8,832	21,273
Gross Realized Gains	117	1,003
Gross Realized Losses	(31)	(27)
Net Realized Gain (Loss)	86	976
Calls And Maturities Of Marketable Securities \| Fixed Income Securities \| Available for sale securities
Summary of the disposition of fixed income and equity securities
Proceeds From Sales	71,974	96,285
Gross Realized Gains	20	255
Gross Realized Losses	(13)	(48)
Net Realized Gain (Loss)	$ 7	$ 207

The difference between the carrying value and the sale price of an investment. A gain would be recognized when the sale price of the investment is greater than the carrying value of the investment. This element refers to the Gain included in earnings and not to the cash proceeds of the sale.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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The difference between the carrying value and the sale price of an investment. A loss would be recognized when the sale price of the investment is less than the carrying value of the investment. This element refers to the Loss included in earnings and not to the cash proceeds of the sale.

+ References

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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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Amount of realized gain (loss) on investment in marketable security, excluding other-than-temporary impairment (OTTI).

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The cash inflow associated with the sale, maturity and collection of all investments such as debt, security and so forth during the period.

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