CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Operating Activities:
Net income (loss)	$ (1.4)	$ 7.8
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	12.6	11.3
Equity compensation expense	3.6	3.5
Deferred income taxes	(4.6)	(5.9)
Equity in undistributed income of unconsolidated joint ventures	0.0	(0.3)
Dividends received from unconsolidated joint ventures	0.0	1.2
Other non-cash charges, net	0.0	0.1
Changes in assets and liabilities:
Accounts receivable	(1.9)	(2.8)
Proceeds from insurance related to operations	0.0	4.1
Contract assets	(0.6)	4.1
Inventories, net	1.3	1.3
Other current assets	(0.4)	0.4
Accounts payable and other accrued expenses	4.2	2.0
Other, net	(1.1)	1.3
Net cash provided by operating activities	11.7	28.1
Investing Activities:
Capital expenditures	(9.6)	(9.4)
Proceeds from the sale of marketable equity securities	0.2	0.0
Purchases of marketable equity securities	(0.1)	0.0
Proceeds from the sale of property, plant and equipment, net	13.4	0.0
Net cash provided by (used in) investing activities	3.9	(9.4)
Financing Activities:
Repayment of debt principal and finance lease obligations	(0.4)	(30.1)
Payments of taxes related to net share settlement of equity awards	(1.2)	(1.1)
Share repurchases	0.0	(0.3)
Net cash used in financing activities	(1.6)	(31.5)
Effect of exchange rate fluctuations on cash	1.8	(2.0)
Net increase (decrease) in cash and cash equivalents	15.8	(14.8)
Cash and cash equivalents at beginning of period	159.8	131.7
Cash and cash equivalents at end of period	175.6	116.9
Supplemental Disclosures:
Accrued capital additions	5.5	5.4
Interest, net of amounts capitalized	0.3	0.5
Income taxes, net of refunds	$ 7.7	$ 3.1