Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 57.1	$ 55.2
Short-term investments	175.7	231.0
Receivables:
Trade receivables, net	145.6	137.7
Other	10.7	11.9
Inventories	199.9	201.6
Prepaid expenses and other current assets	26.8	18.5
Total current assets	615.8	655.9
Property, plant and equipment, net	552.1	530.9
Deferred tax assets, net	138.3	159.7
Intangible assets, net	25.7	26.4
Goodwill	18.8	37.2
Other assets	36.0	33.4
Total	1,386.7	1,443.5
Current liabilities:
Accounts payable	84.2	75.8
Accrued salaries, wages and related expenses	34.6	49.1
Other accrued liabilities	37.5	40.1
Total current liabilities	156.3	165.0
Net liabilities of Salaried VEBA	28.0	28.6
Deferred tax liabilities	3.3	3.3
Long-term liabilities	61.1	73.2
Long-term debt	369.2	368.7
Total liabilities	617.9	638.8
Commitments and contingencies
Stockholders' equity:
Preferred stock, 5,000,000 shares authorized at both June 30, 2017 and December 31, 2016; no shares were issued and outstanding at June 30, 2017 and December 31, 2016	0.0	0.0
Common stock, par value $0.01, 90,000,000 shares authorized at both June 30, 2017 and at December 31, 2016; 22,392,995 shares issued and 16,923,738 shares outstanding at June 30, 2017; 22,332,732 shares issued and 17,651,461 shares outstanding at December 31, 2016	0.2	0.2
Additional paid in capital	1,049.3	1,047.4
Retained earnings	97.6	75.2
Treasury stock, at cost, 5,469,257 shares at June 30, 2017 and 4,681,271 shares at December 31, 2016, respectively	(344.0)	(281.4)
Accumulated other comprehensive loss	(34.3)	(36.7)
Total stockholders' equity	768.8	804.7
Total	$ 1,386.7	$ 1,443.5