Consolidated Balance Sheets - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 34.4	$ 55.2
Short-term investments	195.5	231.0
Receivables:
Trade receivables – net	157.0	137.7
Other	11.8	11.9
Inventories	203.5	201.6
Prepaid expenses and other current assets	34.0	18.5
Total current assets	636.2	655.9
Property, plant and equipment – net	535.8	530.9
Deferred tax assets – net	140.8	159.7
Intangible assets – net	26.0	26.4
Goodwill	37.2	37.2
Other assets	37.1	33.4
Total	1,413.1	1,443.5
Current liabilities:
Accounts payable	84.4	75.8
Accrued salaries, wages and related expenses	29.1	49.1
Other accrued liabilities	40.4	40.1
Total current liabilities	153.9	165.0
Net liabilities of Salaried VEBA	28.3	28.6
Deferred tax liabilities	3.3	3.3
Long-term liabilities	60.1	73.2
Long-term debt	368.9	368.7
Total liabilities	614.5	638.8
Commitments and contingencies
Stockholders' equity:
Preferred stock, 5,000,000 shares authorized at both March 31, 2017 and December 31, 2016; no shares were issued and outstanding at March 31, 2017 and December 31, 2016	0.0	0.0
Common stock, par value $0.01, 90,000,000 shares authorized at both March 31, 2017 and at December 31, 2016; 22,379,247 shares issued and 17,282,630 shares outstanding at March 31, 2017; 22,332,732 shares issued and 17,651,461 shares outstanding at December 31, 2016	0.2	0.2
Additional paid in capital	1,046.0	1,047.4
Retained earnings	101.9	75.2
Treasury stock, at cost, 5,096,617 shares at March 31, 2017 and 4,681,271 shares at December 31, 2016, respectively	(314.1)	(281.4)
Accumulated other comprehensive loss	(35.4)	(36.7)
Total stockholders' equity	798.6	804.7
Total	$ 1,413.1	$ 1,443.5