CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 20.9	$ 11.1
Trade accounts receivable, net	193.5	212.5
Inventories	76.5	70.3
Other receivables, net	25.8	13.2
Prepaid expenses and other	9.1	11.1
Total current assets	325.8	318.2
Property, plant and equipment, net of accumulated depreciation, depletion and amortization of $395.3 as of June 30, 2021 and $360.2 as of December 31, 2020	806.8	788.2
Operating lease assets	73.2	76.1
Goodwill	238.0	238.2
Intangible assets, net of accumulated amortization of $102.1 as of June 30, 2021 and $97.5 as of December 31, 2020	60.0	70.9
Other assets	19.8	14.7
Total assets	1,523.6	1,506.3
Current liabilities:
Accounts payable	94.3	127.8
Accrued liabilities	75.6	86.1
Current maturities of long-term debt	40.8	33.7
Current operating lease liabilities	14.7	14.3
Total current liabilities	225.4	261.9
Long-term debt, net of current maturities	748.3	668.7
Long-term operating lease liabilities	62.5	65.5
Other long-term obligations and deferred credits	46.4	51.9
Deferred income taxes	61.3	56.6
Total liabilities	1,143.9	1,104.6
Commitments and contingencies (Note 9)
Equity:
Additional paid-in capital	381.4	363.8
Retained earnings	28.2	53.3
Treasury stock, at cost	(52.2)	(37.9)
Total shareholders' equity	357.4	379.2
Non-controlling interest	22.3	22.5
Total equity	379.7	401.7
Total liabilities and equity	$ 1,523.6	$ 1,506.3