Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Investments, at fair value:
Amortized cost on fixed maturities trading investments	$ 4,226,790	$ 3,909,780
Cost - equity security trading investments	668,843	754,536
Cost - short-term investments	$ 123,928	$ 141,206
Shareholders’ equity:
Common stock, shares authorized (in shares)	70,000,000	70,000,000
Common stock, shares issued (in shares)	55,371,000	55,371,000
Common stock, shares outstanding (in shares)	55,371,000	55,371,000