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Investments - Schedule of Credit Quality of Investment Securities With Contractual Maturities or The Issuer of Such Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Fair Value	$ 1,064,330	$ 1,014,626
Percentage of Total Fair Value	100.00%	100.00%
AAA
Debt Securities, Available-for-sale [Line Items]
Fair Value	$ 333,516	$ 297,475
Percentage of Total Fair Value	31.30%	29.30%
AA
Debt Securities, Available-for-sale [Line Items]
Fair Value	$ 128,249	$ 154,975
Percentage of Total Fair Value	12.00%	15.30%
A
Debt Securities, Available-for-sale [Line Items]
Fair Value	$ 356,090	$ 327,427
Percentage of Total Fair Value	33.50%	32.30%
BBB
Debt Securities, Available-for-sale [Line Items]
Fair Value	$ 245,823	$ 232,316
Percentage of Total Fair Value	23.10%	22.90%
No Rating Available
Debt Securities, Available-for-sale [Line Items]
Fair Value	$ 652	$ 2,433
Percentage of Total Fair Value	0.10%	0.20%

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-Topic 320
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-Name Accounting Standards Codification
-Section 50
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-URI https://asc.fasb.org//1943274/2147481800/320-10-50-2

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