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Investments - Summary of Securities Available for Sale (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Investments, Debt and Equity Securities [Abstract]
Proceeds from sales and maturities (fair value)		$ 186,507	$ 1,148,418	$ 223,266
Proceeds from sales of equity securities		85,103	81,559	29,680
Gross realized gains on sale of securities:		2,649	57,378	790
Equity Securities, FV-NI, Realized Gain		3,005	6,438	367
Gross realized losses on sale of securities:		(2,434)	(464)	(298)
Equity Securities, FV-NI, Realized Loss		(208)	0	(14,787)
Realized gains on sales of investment real estate		401	0	1,213
Net realized gains (losses) on investments	$ 56,400	$ 5,892	$ 63,352	$ (12,715)

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Amount of realized gain on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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