Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 25, 2022	Jun. 26, 2021
Cash flows from operating activities:
Net income	$ 50,337	$ 122,703
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on business divestitures	0	(75,664)
Loss on extinguishment of debt	232	1,761
Gain from sale of property, plant and equipment	(58)	(55)
Depreciation and amortization	23,199	24,997
Share-based compensation expense	7,355	7,029
Non-cash inventory related charges	2,154	2,690
Deferred income taxes	1,056	459
Changes in accrued retiree medical benefits	(270)	45
Changes in other accrued liabilities	(555)	(72)
Changes in other assets	(2,243)	(219)
Amortization of cloud-based software implementation costs	956	748
Interest capitalized associated with cloud computing implementation	(59)	(85)
Amortization of debt discounts and issuance costs	180	441
Changes in assets and liabilities:
Customer advances	9,515	(3,776)
Accounts receivable	(24,913)	(80,118)
Inventories	(6,024)	(25,633)
Other current assets	(7,013)	(1,852)
Accounts payable	(4,194)	39,611
Deferred profit	(2,608)	8,912
Income taxes payable	6,950	15,731
Accrued compensation, warranty and other liabilities	(8,408)	368
Operating lease right-of-use assets	2,751	3,919
Current and long-term operating lease liabilities	(2,541)	(6,228)
Net cash provided by operating activities	45,799	35,712
Cash flows from investing activities:
Cash received from disposition of business, net of cash paid	0	120,137
Cash received from sale of property, plant and equipment	84	106
Purchases of short-term investments	(72,433)	(136,526)
Sales and maturities of short-term investments	74,150	77,014
Purchases of property, plant and equipment	(5,724)	(5,549)
Net cash provided by (used in) investing activities	(3,923)	55,182
Cash flows from financing activities:
Payments on current and long-term finance lease liabilities	(86)	(91)
Repurchases of common stock, net	(3,241)	(5,622)
Proceeds from revolving line of credit and construction loans	0	818
Proceeds received from issuance of common stock, net of fees	0	223,119
Repayments of long-term debt	(25,198)	(104,811)
Acquisition of treasury stock	(20,378)	0
Net cash provided by (used in) financing activities	(48,903)	113,413
Effect of exchange rate changes on cash and cash equivalents	(2,588)	231
Net increase (decrease) in cash and cash equivalents	(9,615)	204,538
Cash and cash equivalents at beginning of period	290,201	149,358
Cash and cash equivalents at end of period	280,586	353,896
Supplemental disclosure of cash flow information:
Cash paid for income taxes	10,760	3,747
Inventory capitalized as property, plant and equipment	1,116	997
Business divestiture expenses included in other liabilities	0	5,266
Property, plant and equipment purchases included in accounts payable	1,153	690
Cash paid for interest	$ 1,458	$ 4,180