CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 27, 2025	Dec. 28, 2024	Dec. 30, 2023
Cash flows from operating activities:
Net earnings	$ 353,688	$ 350,624	$ 144,912
Adjustments to reconcile net earnings to net cash flows from operating activities:
Depreciation and amortization	88,509	95,395	98,708
Contribution to defined benefit pension plan	(3,159)	(19,599)	(17,345)
Impairment of long-lived assets	91,337		140,844
Loss (gain) on divestitures		4,474	(2,994)
Stock-based compensation	24,308	29,869	39,219
Net periodic pension cost	1,052	640	249
Loss (gain) on sale of property, plant, and equipment	(545)	7,619	973
Equity method investment loss	90	79	1,419
Deferred income taxes	(19,196)	(24,655)	(18,649)
Other, net	2,824
Changes in assets and liabilities:
Receivables	82,466	(29,474)	(46,308)
Inventories	39,442	45,643	88,433
Contract assets	(79,804)	(11,844)	(1,230)
Prepaid expenses and other assets (current and non-current)	21,850	613	(26,161)
Accounts payable	(26,334)	24,801	(10,529)
Contract liabilities (current and non-current)	(80,504)	63,682	(106,884)
Accrued expenses	3,558	8,205	22,591
Current income taxes	(43,019)	18,827	13,746
Other non-current liabilities	(79)	7,779	(14,219)
Net cash flows from operating activities	456,484	572,678	306,775
Cash flows from investing activities:
Purchases of property, plant, and equipment	(145,035)	(79,451)	(96,771)
Proceeds from divestitures, net of cash divested		3,830	6,369
Proceeds from sales of assets	2,176	643	1,710
Proceeds from property damage insurance claims	1,408		7,468
Acquisitions, net of cash acquired			(32,676)
Other, net	(1,288)	(3,900)	(1,381)
Net cash flows from investing activities	(142,739)	(78,878)	(115,281)
Cash flows from financing activities:
Proceeds from short-term borrowings	2,840	15,041	30,785
Repayments on short-term borrowings	(4,492)	(16,526)	(34,083)
Proceeds from long-term borrowings	215,785	30,009	370,012
Principal repayments on long-term borrowings	(151,563)	(408,080)	(134,748)
Proceeds from settlement of financial derivatives		2,711
Dividends paid	(52,481)	(48,358)	(49,515)
Dividends to redeemable noncontrolling interests	(698)	(664)	(662)
Purchases of redeemable noncontrolling interests	(101,771)	(17,745)
Repurchases of common stock	(198,089)	(70,069)	(345,279)
Proceeds from exercises under stock plans	6,354	6,632	5,841
Tax withholdings on exercises under stock plans	(12,896)	(13,075)	(18,756)
Other, net	(1,851)	(2,436)
Net cash flows from financing activities	(298,862)	(522,560)	(176,405)
Effect of exchange rate changes on cash and cash equivalents	7,942	(9,966)	2,546
Net change in cash and cash equivalents	22,825	(38,726)	17,635
Cash and cash equivalents-beginning of period	164,315	203,041	185,406
Cash and cash equivalents-end of period	187,140	164,315	203,041
Supplemental disclosures of cash flow information:
Interest paid	38,997	57,709	55,541
Income taxes paid	$ 84,228	$ 125,548	$ 103,697