Financial Instruments (Narrative) (Details)	3 Months Ended
	Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($)	Sep. 02, 2020 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Realized investment gains (losses)	$ 0	$ 0
Change in fair value of contingent consideration	(17,470,000)	4,800,000
Business combination, contingent consideration, liability	46,400,000		$ 63,900,000
Ascyrus Medical LLC
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Percentage of outstanding equity acquired				100.00%
Maximum amount of future consideration payment				$ 100,000,000
Change in fair value of contingent consideration	$ (17,500,000)	$ 4,800,000
Ascyrus Medical LLC | Measurement Input, Discount Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration, measurement input	0.17