CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	3 Months Ended
	Mar. 30, 2025	Mar. 31, 2024
Operating activities:
Net income from consolidated operations	$ 4.5	$ 1.3
Adjustments to reconcile net income from consolidated operations to net cash provided by (used in) operating activities:
Depreciation and amortization	10.4	9.3
Amortization of lease right-of-use assets	3.0	3.0
Stock-based compensation	8.7	9.2
Amortization of deferred financing costs	0.2	0.2
Changes in assets and liabilities, net of acquisitions:
Accounts receivable	0.8	12.0
Unbilled receivables	(38.0)	(8.5)
Inventoried costs	(5.4)	(3.5)
Prepaid expenses and other assets	(12.8)	(13.2)
Operating lease liabilities	(3.0)	(3.1)
Accounts payable	0.7	(0.3)
Accrued expenses	5.4	0.6
Accrued compensation	(1.8)	(3.7)
Billings in excess of costs and earnings on uncompleted contracts	(0.7)	(4.3)
Income tax receivable and payable	(1.1)	1.5
Other liabilities	(0.1)	0.2
Net cash provided by (used in) operating activities	(29.2)	0.7
Investing activities:
Capital expenditures	(22.6)	(16.6)
Net cash used in investing activities	(22.6)	(16.6)
Financing activities:
Proceeds from the issuance of common stock, net of issuance costs	0.0	330.7
Borrowing under credit facility	0.0	10.0
Repayment under credit facility and term loan	(2.5)	(46.3)
Payments under finance leases	(0.4)	(0.3)
Payments of employee taxes withheld from share-based awards	(16.2)	(15.1)
Proceeds from shares issued under equity plans	4.6	3.6
Net cash provided by (used in) financing activities	(14.5)	282.6
Net cash provided (used)	(66.3)	266.7
Effect of exchange rate changes on cash and cash equivalents	0.7	(0.6)
Net increase (decrease) in cash and cash equivalents	(65.6)	266.1
Cash and cash equivalents at beginning of period	329.3	72.8
Cash and cash equivalents at end of period	263.7	338.9
Non-cash investing and financing activities:
Financing lease obligation incurred	0.0	0.4
Capital expenditures included in accounts payable and accrued expenses	6.0	2.4
Common stock issuance for acquisition	$ 32.2	$ 0.0