Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 115.3	$ 125.6
Short-term investments	22.3	36.7
Receivables:
Trade receivables, net	195.8	179.8
Other	22.4	25.6
Contract assets	58.4	54.9
Inventories	233.9	215.1
Prepaid expenses and other current assets	23.0	18.9
Total current assets	671.1	656.6
Property, plant and equipment, net	610.9	611.8
Operating lease assets	27.4	0.0
Deferred tax assets, net	22.4	35.9
Intangible assets, net	31.7	32.4
Goodwill	44.0	44.0
Other assets	40.3	38.6
Total	1,447.8	1,419.3
Current liabilities:
Accounts payable	124.4	121.4
Accrued salaries, wages and related expenses	28.2	40.1
Other accrued liabilities	51.6	44.0
Total current liabilities	204.2	205.5
Long-term portion of operating lease liabilities	26.6	0.0
Net liabilities of Salaried VEBA	32.5	32.4
Deferred tax liabilities	4.2	4.2
Long-term liabilities	61.8	66.4
Long-term debt	370.6	370.4
Total liabilities	699.9	678.9
Commitments and contingencies
Stockholders' equity:
Preferred stock, 5,000,000 shares authorized at both March 31, 2019 and December 31, 2018; no shares were issued and outstanding at March 31, 2019 and December 31, 2018	0.0	0.0
Common stock, par value $0.01, 90,000,000 shares authorized at both March 31, 2019 and at December 31, 2018; 22,547,626 shares issued and 16,134,547 shares outstanding at March 31, 2019; 22,471,705 shares issued and 16,234,603 shares outstanding at December 31, 2018	0.2	0.2
Additional paid in capital	1,056.7	1,059.3
Retained earnings	168.0	150.2
Treasury stock, at cost, 6,413,079 shares at March 31, 2019 and 6,237,102 shares at December 31, 2018, respectively	(437.9)	(420.5)
Accumulated other comprehensive loss	(39.1)	(48.8)
Total stockholders' equity	747.9	740.4
Total	$ 1,447.8	$ 1,419.3