CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 338.9	$ 72.8
Accounts receivable, net	116.9	128.8
Unbilled receivables, net	208.9	200.4
Inventoried costs	159.8	156.2
Prepaid expenses	26.8	16.0
Other current assets	20.4	20.0
Total current assets	871.7	594.2
Property, plant and equipment, net	251.3	243.6
Operating lease right-of-use assets	42.9	45.7
Goodwill	568.9	569.1
Intangible assets, net	60.2	62.4
Other assets	119.6	117.5
Total assets	1,914.6	1,632.5
Current liabilities:
Accounts payable	61.9	63.1
Accrued expenses	36.0	35.4
Accrued compensation	61.1	64.7
Accrued interest	1.4	1.7
Billings in excess of costs and earnings on uncompleted contracts	97.5	101.8
Current portion of operating lease liabilities	11.6	12.1
Other current liabilities	18.7	13.7
Total current liabilities	288.2	292.5
Long-term debt, net of current portion	179.4	219.3
Operating lease liabilities, net of current portion	35.3	37.8
Other long-term liabilities	83.1	84.4
Total liabilities	586.0	634.0
Commitments and contingencies (Note 14)
Redeemable noncontrolling interest	22.5	22.5
Stockholders’ equity:
Preferred stock, $0.001 par value, 5,000,000 shares authorized, 0 shares outstanding at March 31, 2024 and December 31, 2023	0.0	0.0
Common stock, $0.001 par value, 195,000,000 shares authorized; 150,020,266 and 129,286,964 shares issued and outstanding at March 31, 2024 and December 31, 2023, respectively	0.2	0.0
Additional paid-in capital	1,982.7	1,654.5
Accumulated other comprehensive income	2.1	1.7
Accumulated deficit	(678.9)	(680.2)
Total stockholders’ equity	1,306.1	976.0
Total liabilities and stockholders’ equity	$ 1,914.6	$ 1,632.5