Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 26, 2022	Mar. 27, 2021
Operating Activities
Net loss	$ (24,851)	$ (27,027)
Loss from discontinued operations	471	10,817
Adjustments to reconcile loss from continuing operations to cash provided by operating activities:
Depreciation and amortization	27,393	33,316
Stock-based incentive compensation expense (benefit)	2,259	(687)
Deferred income tax expense	(697)	(2,119)
Unrealized gain on GreenFirst equity securities	(8,900)	0
Net periodic benefit cost of pension and other postretirement plans	1,519	2,104
Unrealized gain on derivative instruments	0	(1,728)
Unrealized loss from foreign currency	1,533	1,636
Other	1,757	808
Changes in operating assets and liabilities:
Receivables	(22,751)	(6,580)
Inventories	6,946	(19,154)
Accounts payable	13,505	(2,470)
Accrued liabilities	5,053	26,958
All other operating activities	(24,503)	8,146
Contributions to pension and other postretirement plans	(1,619)	(1,582)
Cash (Used in) Provided by Operating Activities-continuing operations	(22,885)	22,438
Cash (Used in) Provided by Operating Activities-discontinued operations	(635)	15,777
Cash (Used in) Provided by Operating Activities	(23,520)	38,215
Investing Activities
Capital expenditures, net	(45,167)	(16,094)
Investment in equity method investment	0	(987)
Cash Used for Investing Activities-continuing operations	(45,167)	(17,081)
Cash Used for Investing Activities-discontinued operations	0	(3,431)
Cash Used for Investing Activities	(45,167)	(20,512)
Financing Activities
Revolving credit facility and other borrowings	3,397	0
Repayment of long-term debt	(2,119)	(1,549)
Short-term financing, net	(5,388)	(520)
Common stock repurchased	(304)	(1,420)
Cash Used for Financing Activities	(4,414)	(3,489)
Cash and Cash Equivalents
Change in cash and cash equivalents	(73,101)	14,214
Net effect of foreign exchange on cash and cash equivalents	(1,457)	(1,117)
Balance, beginning of period	253,307	93,653
Balance, end of period	$ 178,749	$ 106,750