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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, 2022
Dec. 31, 2021
Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract]        
Proceeds from sales and maturities (fair value)   $ 98,409 $ 186,507 $ 1,148,418
Proceeds from sales of equity securities   34,178 85,103 81,559
Gross realized gains on sale of securities:   242 2,649 57,378
Equity Securities, FV-NI, Realized Gain   2,240 3,005 6,438
Gross realized losses on sale of securities:   (2,060) (2,434) (464)
Equity Securities, FV-NI, Realized Loss   (74) (208) 0
Net realized gains (losses) on investments $ 56,400 348 5,892 63,352
Proceeds from sales of investment real estate   0 2,591 0
Realized gains on sales of investment real estate   $ 0 $ 401 $ 0