Convertible Debt Instruments - Expenses and Interest (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
6.0% Convertible Debenture
Convertible Debt Instruments
Interest expense	$ 1,881
Amortization of discount (premium)	746
Interest and Debt Expense, Total	$ 2,627
Effective interest rate (as a percent)	8.80%
7.0% Convertible Senior Notes
Convertible Debt Instruments
Interest expense	$ 2,423	$ 296
Amortization of discount (premium)	(1,284)	(159)
Interest and Debt Expense, Total	$ 1,139	$ 137
Effective interest rate (as a percent)	3.00%	3.00%
3.75% Convertible Senior Notes
Convertible Debt Instruments
Interest expense	$ 548	$ 1,690
Amortization of debt issuance costs	111	316
Interest and Debt Expense, Total	$ 659	$ 2,006
Effective interest rate (as a percent)	4.50%	4.50%