v3.26.1
Financial Instruments and Fair Value Measurements - Fair Values of Financial Instruments Not Measured at Fair Value in Consolidated Balance Sheets (Details) - 10.625% senior secured notes due January 15, 2031 - Senior Notes - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Jun. 30, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Interest rate (in percent) 10.625%   10.625%
Long-term debt, carrying value $ 686.9 $ 687.2  
Fair Value      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Long-term debt, fair value $ 658.0 $ 717.5