Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 25, 2021	Dec. 26, 2020
Cash flows from operating activities:
Net income (loss)	$ 96,847	$ 167,325	$ (13,801)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
(Gain) loss on business divestitures	0	(70,815)	(35)
Interest capitalized associated with cloud computing implementation	(199)	(91)	(124)
Net accretion on investments	(859)	0	0
(Gain) loss on extinguishment of debt	312	3,411	(268)
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)	0	100	11,249
Depreciation and amortization	46,016	48,568	52,746
Share-based compensation expense	14,918	13,792	14,234
Inventory related charges	6,725	6,523	3,731
Amortization of debt discounts and issuance costs	315	643	1,177
Accrued retiree benefits	(1,589)	(500)	1,675
Deferred income taxes	(3,504)	953	(5,305)
Changes in other assets	(3,230)	(1,652)	285
Amortization of cloud-based software implementation costs	2,060	1,644	1,191
(Gain) loss from sale of property, plant and equipment	(203)	1	(4,170)
Changes in other accrued liabilities	(943)	(416)	91
Operating lease right-of-use assets	5,139	6,746	6,831
Changes in current assets and liabilities, excluding effects from divestitures:
Customer advances	(184)	(4,090)	2,188
Accounts receivable	12,451	(59,123)	(20,210)
Inventories	(18,508)	(35,864)	(14,982)
Accrued compensation, warranty and other liabilities	(4,007)	225	4,678
Accounts payable	(33,130)	17,316	15,058
Deferred profit	(5,014)	4,732	871
Other current assets	(16,202)	1,709	1,150
Income taxes payable	20,908	3,444	(2,089)
Current and long-term operating lease liabilities	(5,258)	(6,666)	(6,291)
Net cash provided by operating activities	112,861	97,915	49,880
Cash flows from investing activities:
Purchases of property, plant and equipment	(14,770)	(12,000)	(18,660)
Net cash received from sale of land, facility and assets	349	157	17,025
Purchases of short-term investments	(208,856)	(204,699)	(19,703)
Sales and maturities of short-term investments	155,406	135,549	0
Cash received from disposition of business, net of cash paid	0	120,886	2,975
Net cash provided by (used in) investing activities	(67,871)	39,893	(18,363)
Cash flows from financing activities:
Cash dividends paid	0	0	(4,971)
Proceeds from revolving line of credit and construction loans	0	1,376	5,878
Repayments of long-term debt	(38,226)	(206,069)	(41,056)
Net issuance (repurchases) of stock, including awards settled in cash	(1,957)	(4,390)	2,077
Payments on current and long-term finance lease liabilities	(167)	(186)	(146)
Acquisition of treasury stock	(50,719)	(7,324)	0
Proceeds received from issuance of common stock, net of fees	0	223,119	0
Net cash provided by (used in) financing activities	(91,069)	6,526	(38,218)
Effect of exchange rate changes on cash and cash equivalents	(1,781)	(3,491)	129
Net increase (decrease) in cash and cash equivalents	(47,860)	140,843	(6,572)
Cash and cash equivalents at beginning of year	290,201	149,358	155,930
Cash and cash equivalents at end of year	242,341	290,201	149,358
Supplemental disclosure of cash flow information:
Cash paid for income taxes	23,123	22,717	5,772
Cash paid for interest	3,443	6,253	16,324
Property, plant and equipment purchases included in accounts payable	152	624	1,063
Inventory capitalized as capital assets	$ 2,529	$ 1,635	$ 1,050