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Fair Value Measurements Other Long-Term Investments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Change in fair value of limited partnerships	$ (429)	$ (969)
Other Long-Term Investments	$ 85,439	$ 93,604
Middle market
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Range (In years)	2 years	3 years
Global equity market
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Range (In years)	0 years	0 years
Infrastructure
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Range (In years)	8 years	9 years
Limited Partnership Funds
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Change in fair value of limited partnerships	$ (400)	$ (1,000)
Minimum [Member] | Late-stage growth
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Range (In years)	2 years	3 years
Maximum [Member] | Late-stage growth
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Range (In years)	4 years	5 years
Fair Value Measured at Net Asset Value Per Share | Middle market
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Long-Term Investments	$ 30,956	$ 35,369
Fair Value Measured at Net Asset Value Per Share | Global equity market
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Long-Term Investments	0	11,568
Fair Value Measured at Net Asset Value Per Share | Late-stage growth
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Long-Term Investments	36,623	27,825
Fair Value Measured at Net Asset Value Per Share | Infrastructure
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Long-Term Investments	15,013	18,575
Fair Value Measured at Net Asset Value Per Share | Limited Partnership Funds
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Long-Term Investments	82,592	93,337
Fair Value Measured at Net Asset Value Per Share | Unfunded Loan Commitment | Middle market
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Long-Term Investments	0	1,660
Fair Value Measured at Net Asset Value Per Share | Unfunded Loan Commitment | Global equity market
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Long-Term Investments	0	0
Fair Value Measured at Net Asset Value Per Share | Unfunded Loan Commitment | Late-stage growth
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Long-Term Investments	2,232	8,134
Fair Value Measured at Net Asset Value Per Share | Unfunded Loan Commitment | Infrastructure
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Long-Term Investments	4,052	5,637
Fair Value Measured at Net Asset Value Per Share | Unfunded Loan Commitment | Limited Partnership Funds
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Long-Term Investments	$ 6,284	$ 15,431

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