Condensed Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Income Statement [Abstract]
Revenues	$ 144.7	$ 154.0
Costs and expenses:
Cost of sales	119.1	123.8
Depreciation and amortization	21.9	24.7
Selling, general and administrative	15.4	21.6
Research and development costs	0.4	0.4
Operating loss	(12.1)	(16.5)
Non-operating expense:
Interest income	(0.0)	(0.3)
Interest expense	11.7	10.3
Loss on debt extinguishment	0.0	1.2
Net loss before income tax	(23.8)	(27.7)
Income tax expense	0.2	0.2
Net loss	$ (24.0)	$ (27.9)
Net loss per share - basic (in dollars per share)	$ (1.23)	$ (1.62)
Net loss per share - diluted (in dollars per share)	$ (1.23)	$ (1.62)