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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 9 Months Ended
Sep. 27, 2026
Sep. 28, 2025
Cash flows from operating activities:    
Consolidated net income $ 1,121,533 $ 296,827
Adjustments to reconcile consolidated net income from operations to net cash provided by operating activities:    
Depreciation 90,256 79,484
Stock-based compensation 63,649 47,561
Equity in net earnings of affiliate 3,277 16,709
Amortization 12,925 12,723
Provision for excess and obsolete inventory 19,213 19,175
Losses (gains) on investments (7,076) (4,722)
Deferred taxes (41,163) (29,100)
Retirement plan losses (gains) (228) (673)
Other 3,757 3,344
Changes in operating assets and liabilities, net of businesses acquired:    
Accounts receivable (302,733) (111,787)
Inventories (178,794) (34,618)
Prepayments and other assets (224,940) (22,599)
Accounts payable and other liabilities 347,615 121,447
Deferred revenue and customer advances 64,045 25,652
Retirement plans contributions (4,605) (6,986)
Income taxes 81,144 (19,661)
Net cash provided by operating activities 1,047,875 392,776
Cash flows from investing activities:    
Purchases of property, plant and equipment (241,762) (161,121)
Acquisition of businesses, net of cash and cash equivalents acquired (165,611) (144,380)
Purchase of investment in a business (20,900) (25,519)
Purchases of marketable securities (50,004) (27,465)
Proceeds from maturities of marketable securities 11,880 41,621
Proceeds from sales of marketable securities 30,607 9,172
Net cash used for investing activities (435,790) (307,692)
Cash flows from financing activities:    
Proceeds from borrowings on revolving credit facility 350,000 200,000
Repayments of borrowings on revolving credit facility (550,000) 0
Dividend payments (61,024) (57,574)
Repurchase of common stock (173,502) (518,658)
Debt issuance costs (2,686) 0
Payments related to net settlement of employee stock compensation awards (42,153) (15,254)
Issuance of common stock under stock purchase and stock option plans 33,708 30,076
Net cash used for financing activities (445,657) (361,410)
Effects of exchange rate changes on cash and cash equivalents 563 (4,328)
(Decrease) increase in cash and cash equivalents 166,991 (280,654)
Cash and cash equivalents at beginning of period 293,751 553,354
Cash and cash equivalents at end of period 460,742 272,700
Non-cash investing activities:    
Capital expenditures incurred but not yet paid: $ 12,292 $ 7,821