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Fair Value Measurements (Narrative) (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025 USD ($) item	Jun. 30, 2024 USD ($)	Jun. 30, 2025 USD ($) item	Jun. 30, 2024 USD ($)	Dec. 31, 2024 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term investments	$ 15,962		$ 15,962		$ 20,779
Short-term investments	1,551		1,551		$ 254,534
Purchase of short-term investments			432,900	$ 680,400
Cost method investment, impairment loss	$ 0	$ 0	0	0
Proceeds from sale of short-term investments			$ 685,800	$ 651,000
Minimum [Member] | Measurement Input, Discount Rate [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Average discount rate | item	0.076		0.076
Maximum [Member] | Measurement Input, Discount Rate [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Average discount rate | item	0.080		0.080
Revolving Credit Facility [Member] | Minimum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Basis spread on variable interest rate			1.125%
Revolving Credit Facility [Member] | Maximum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Basis spread on variable interest rate			1.50%

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