Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 172.1	$ 125.6
Short-term investments	25.3	36.7
Receivables:
Trade receivables, net	188.1	179.8
Other	26.1	25.6
Contract assets	46.1	54.9
Inventories	192.5	215.1
Prepaid expenses and other current assets	18.4	18.9
Total current assets	668.6	656.6
Property, plant and equipment, net	614.3	611.8
Operating lease assets	26.3	0.0
Deferred tax assets, net	6.3	35.9
Intangible assets, net	30.3	32.4
Goodwill	44.0	44.0
Other assets	36.5	38.6
Total	1,426.3	1,419.3
Current liabilities:
Accounts payable	93.8	121.4
Accrued salaries, wages and related expenses	31.9	40.1
Other accrued liabilities	50.1	44.0
Total current liabilities	175.8	205.5
Long-term portion of operating lease liabilities	25.6	0.0
Net liabilities of Salaried VEBA	32.8	32.4
Deferred tax liabilities	4.2	4.2
Long-term liabilities	65.4	66.4
Long-term debt	371.1	370.4
Total liabilities	674.9	678.9
Commitments and contingencies
Stockholders' equity:
Preferred stock, 5,000,000 shares authorized at both September 30, 2019 and December 31, 2018; no shares were issued and outstanding at September 30, 2019 and December 31, 2018	0.0	0.0
Common stock, par value $0.01, 90,000,000 shares authorized at both September 30, 2019 and at December 31, 2018; 22,550,827 shares issued and 15,900,956 shares outstanding at September 30, 2019; 22,471,705 shares issued and 16,234,603 shares outstanding at December 31, 2018	0.2	0.2
Additional paid in capital	1,061.5	1,059.3
Retained earnings	193.0	150.2
Treasury stock, at cost, 6,649,871 shares at September 30, 2019 and 6,237,102 shares at December 31, 2018, respectively	(460.1)	(420.5)
Accumulated other comprehensive loss	(43.2)	(48.8)
Total stockholders' equity	751.4	740.4
Total	$ 1,426.3	$ 1,419.3