Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 82.1	$ 35.2
Accounts receivable, net	267.4	245.6
Inventories	303.6	291.0
Prepaid expenses and other current assets	33.7	35.2
Total current assets	686.8	607.0
Property, plant and equipment	2,476.4	2,378.4
Less accumulated depreciation	(775.7)	(752.8)
Property, plant and equipment, net	1,700.7	1,625.6
Goodwill and other intangible assets	72.6	72.2
Investments in affiliated companies	62.8	53.1
Other assets	52.6	42.7
Total assets	2,575.5	2,400.6
Current liabilities:
Current portions of capital lease and term loan	4.2	4.3
Accounts payable	141.7	137.3
Accrued liabilities	128.9	130.3
Total current liabilities	274.8	271.9
Commitments and contingencies (see Note 11)
Long-term debt	837.0	684.4
Other non-current liabilities	201.0	199.4
Total liabilities	1,312.8	1,155.7
Stockholders' equity:
Common stock, $0.01 par value, 200.0 shares authorized, 107.3 shares and 106.7 shares issued at March 31, 2017 and December 31, 2016, respectively	1.1	1.1
Additional paid-in capital	754.9	738.8
Retained earnings	1,309.1	1,254.7
Accumulated other comprehensive loss	(158.1)	(174.4)
Total stockholders' equity including treasury stock value	1,907.0	1,820.2
Less – Treasury stock, at cost, 16.6 shares at March 31, 2017, and 15.3 shares at December 31, 2016	(644.3)	(575.3)
Total stockholders' equity	1,262.7	1,244.9
Total liabilities and stockholders' equity	$ 2,575.5	$ 2,400.6