CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended			79 Months Ended
	Dec. 25, 2021	Dec. 26, 2020	Dec. 28, 2019	Dec. 26, 2020
Cash flows from operating activities:
Net earnings	$ 197,725	$ 142,149	$ 152,105
Adjustments to reconcile net earnings to net cash flows from operations:
Depreciation and amortization	92,577	82,892	82,264
Noncash loss on trading securities	0	39	(172)
Contribution to defined benefit pension plan	(1,924)	(35,399)	(18,461)
Impairment of long-lived assets	27,911	20,389	0
Stock-based compensation	28,720	14,874	11,587
Defined benefit pension plan benefit	(14,567)	(7,311)	(513)
(Gain) loss on sale of property, plant and equipment	(961)	60	(2,513)
Equity in earnings in nonconsolidated subsidiaries	944	1,004	0
Deferred income taxes	71	(1,397)	1,486
Changes in assets and liabilities (net of acquisitions):
Receivables	(69,275)	(24,403)	5,408
Inventories	(289,942)	(21,888)	22,128
Prepaid expenses and other assets (current and non-current)	(36,066)	(10,633)	4,413
Contract asset	(21,579)	19,835	(29,274)
Accounts payable	89,418	33,044	(21,410)
Accrued expenses	30,556	52,548	(4,255)
Contract liabilities	6,589	12,072	113,039
Other noncurrent liabilities	20,181	46,712	(1,274)
Income taxes payable (refundable)	5,560	(8,293)	(6,944)
Net cash flows from operating activities	65,938	316,294	307,614
Cash flows from investing activities:
Purchase of property, plant and equipment	(107,790)	(106,700)	(97,425)
Proceeds from sale of assets	1,745	10,860	5,556
Acquisitions, net of cash acquired	(312,500)	(15,862)	(81,841)
Settlement of net investment hedge	0	11,983	11,184
Investments in nonconsolidated subsidiaries	0	(1,283)	(6,169)
Other, net	1,237	(3,027)	545
Net cash flows used in investing activities	(417,308)	(104,029)	(168,150)
Cash flows from financing activities:
Proceeds from short-term agreements	5,821	20,990	13,195
Principal payments on short-term agreements	(26,062)	(7,946)	(1,868)
Proceeds from long-term borrowings	312,485	88,872	31,000
Principal payments on long-term borrowings	(91,313)	(121,665)	(10,768)
Debt issuance costs	(2,267)	0	0
Dividends paid	(41,412)	(36,930)	(32,642)
Dividends to noncontrolling interest	0	(5,642)	(7,737)
Purchase of noncontrolling interest	0	(59,416)	(27,845)
Proceeds from exercises under stock plans	23,895	18,961	13,619
Purchase of treasury shares	(26,100)	(56,491)	(62,915)	$ (878,138)
Purchase of common treasury shares—stock plan exercises	(21,547)	(14,489)	(12,989)
Net cash flows provided by (used) in financing activities	133,500	(173,756)	(98,950)
Effect of exchange rate changes on cash and cash equivalents	(5,624)	8,675	(182)
Net change in cash and cash equivalents	(223,494)	47,184	40,332
Cash, cash equivalents, and restricted cash—beginning of year	400,726	353,542	313,210
Cash, cash equivalents, and restricted cash—end of year	$ 177,232	$ 400,726	$ 353,542	$ 400,726