Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Operating Activities
Net income	$ 6.8	$ 68.0
Adjustments to reconcile net income to net cash used in operating activities:
Stock-based compensation expense	1.9	1.5
Depreciation and amortization	23.5	25.4
Amortization of deferred financing costs	1.8	2.3
Deferred income taxes	(4.5)	18.6
Noncash loss on assets held for sale	0.0	12.2
Change in fair value of warrant liability	(8.4)	(9.5)
Loss on disposal of assets	0.8	0.3
Other	(3.9)	(11.3)
Changes in operating assets and liabilities:
Accounts receivable	(38.9)	(73.3)
Inventories	15.8	(2.2)
Prepaid expenses and other assets	(0.5)	9.5
Accounts payable	(14.4)	(5.4)
Accrued expenses and other liabilities	(1.8)	(7.2)
Long-term incentive plan accrual	0.4	0.8
Accrued compensation	(20.2)	(32.2)
Income taxes receivable and payable, net	4.6	(8.4)
Contract liabilities	3.2	(0.3)
Net cash used in operating activities	(33.8)	(11.2)
Investing Activities
Purchases of property, plant and equipment	(2.4)	(3.6)
Proceeds from sale of property, plant and equipment	0.0	38.1
Milestone payments from prior asset divestiture	0.0	30.0
Purchase of convertible note receivable	0.0	(5.0)
Net cash provided by (used in) investing activities	(2.4)	59.5
Financing Activities
Proceeds from issuance of common stock upon exercise of stock options	0.4	0.0
Purchases of treasury stock	(9.0)	0.0
Proceeds from stock-based compensation activity	0.0	0.1
Taxes paid for stock-based compensation activity	(2.8)	(0.5)
Net cash used in financing activities:	(11.4)	(0.4)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	0.0	(0.7)
Net change in cash, cash equivalents and restricted cash	(47.6)	47.2
Cash, cash equivalents and restricted cash, beginning of period	209.1	105.6	$ 105.6
Cash, cash equivalents and restricted cash, end of period	161.5	152.8	209.1
Supplemental cash flow disclosures:
Cash paid for interest	13.1	16.7
Cash paid for income taxes, net of refunds	5.3	14.5
Non-cash investing and financing activities:
Purchases of property, plant and equipment unpaid at period end	1.0	1.5
Excise tax liability accrued for treasury stock purchases	0.1	0.0
Reconciliation of cash and cash equivalents and restricted cash:
Cash and cash equivalents	160.3	149.1	205.4
Restricted cash	1.2	3.7
Total	$ 161.5	$ 152.8	$ 209.1