Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 24, 2022
Cash flows from operating activities:
Net income	$ 30,184	$ 75,219
Adjustments to reconcile net income to net cash provided by operating activities:
Loss on extinguishment of debt	369	312
Net accretion on investments	(998)	(411)
Gain from sale of property, plant and equipment	(7)	(191)
Depreciation and amortization	36,634	34,645
Share-based compensation expense	12,680	11,095
Non-cash inventory related charges	4,222	4,826
Deferred income taxes	(514)	1,979
Changes in accrued retiree medical benefits	(727)	(650)
Changes in other accrued liabilities	(416)	(822)
Changes in other assets	(353)	(4,542)
Amortization of cloud-based software implementation costs	2,100	1,434
Interest capitalized associated with cloud computing implementation	0	(122)
Amortization of debt discounts and issuance costs	114	247
Operating lease right-of-use assets	6,328	3,954
Changes in assets and liabilities, excluding effects from acquisitions:
Customer advances	(201)	2,241
Accounts receivable	50,249	(5,783)
Inventories	857	(12,678)
Other current assets	(467)	(9,955)
Accounts payable	(17,534)	(14,464)
Deferred profit	(3,457)	(3,027)
Income taxes payable	(3,898)	8,764
Accrued compensation, warranty and other liabilities	(10,424)	(2,980)
Current and long-term operating lease liabilities	(5,972)	(3,796)
Net cash provided by operating activities	98,769	85,295
Cash flows from investing activities, excluding effects from acquisitions:
Purchases of short-term investments	(73,322)	(154,446)
Sales and maturities of short-term investments	123,863	106,525
Purchases of property, plant and equipment	(12,148)	(10,700)
Cash received from sale of property, plant and equipment	193	296
Payment for purchase of MCT, net of cash received	(26,331)	0
Net cash provided by (used in) investing activities	12,255	(58,325)
Cash flows from financing activities:
Payments on current and long-term finance lease liabilities	(48)	(126)
Repurchases of common stock, net	(7,637)	(3,546)
Repayments of long-term debt	(37,467)	(36,935)
Acquisition of treasury stock	(10,855)	(38,078)
Net cash used in financing activities	(56,007)	(78,685)
Effect of exchange rate changes on cash and cash equivalents	(3,972)	(6,088)
Net increase (decrease) in cash and cash equivalents	51,045	(57,803)
Cash and cash equivalents at beginning of period	242,341	290,201
Cash and cash equivalents at end of period	293,386	232,398
Supplemental disclosure of cash flow information:
Cash paid for income taxes	14,414	16,189
Inventory capitalized as property, plant and equipment	709	1,500
Property, plant and equipment purchases included in accounts payable	245	640
Cash paid for interest	$ 2,707	$ 2,261