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Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) shares in Thousands, $ in Thousands | Jun. 30, 2024 | Dec. 31, 2023
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Statement of Financial Position [Abstract] |  |
Fixed-maturities available for sale, amortized cost | $ 5,648,303 | $ 5,599,111
Trading securities, amortized cost | 99,005 | 110,484
Equity securities, cost | 149,266 | 92,124
Reinvested cash collateral held under securities lending agreements | 98,397 | 149,364
Reinsurance recoverables, paid losses | $ 174 | $ 59
Common stock, par value (in usd per share) | $ 0.001 | $ 0.001
Common stock, shares authorized (in shares) | 485,000 | 485,000
Common stock, shares, issued (in shares) | 171,898 | 173,247
Common stock, shares, outstanding (in shares) | 151,148 | 153,179
Treasury stock (in shares) | 20,750 | 20,068

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