Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 122.4	$ 125.6
Short-term investments	24.4	36.7
Receivables:
Trade receivables, net	178.1	179.8
Other	25.1	25.6
Contract assets	46.9	54.9
Inventories	231.1	215.1
Prepaid expenses and other current assets	21.7	18.9
Total current assets	649.7	656.6
Property, plant and equipment, net	613.8	611.8
Operating lease assets	26.8	0.0
Deferred tax assets, net	15.5	35.9
Intangible assets, net	31.0	32.4
Goodwill	44.0	44.0
Other assets	41.3	38.6
Total	1,422.1	1,419.3
Current liabilities:
Accounts payable	101.3	121.4
Accrued salaries, wages and related expenses	30.4	40.1
Other accrued liabilities	47.2	44.0
Total current liabilities	178.9	205.5
Long-term portion of operating lease liabilities	26.0	0.0
Net liabilities of Salaried VEBA	32.6	32.4
Deferred tax liabilities	4.2	4.2
Long-term liabilities	63.2	66.4
Long-term debt	370.9	370.4
Total liabilities	675.8	678.9
Commitments and contingencies
Stockholders' equity:
Preferred stock, 5,000,000 shares authorized at both June 30, 2019 and December 31, 2018; no shares were issued and outstanding at June 30, 2019 and December 31, 2018	0.0	0.0
Common stock, par value $0.01, 90,000,000 shares authorized at both June 30, 2019 and at December 31, 2018; 22,549,931 shares issued and 16,028,675 shares outstanding at June 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	1,059.2	1,059.3
Retained earnings	177.3	150.2
Treasury stock, at cost, 6,521,256 shares at June 30, 2019 and 6,237,102 shares at December 31, 2018, respectively	(448.1)	(420.5)
Accumulated other comprehensive loss	(42.3)	(48.8)
Total stockholders' equity	746.3	740.4
Total	$ 1,422.1	$ 1,419.3