Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jul. 01, 2021
OPERATING ACTIVITIES:
Net loss	$ (5,942)	$ (51,496)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Losses on investments in joint ventures	134	0
Gain on disposition of property, equipment and other assets	(355)	(2,040)
Impairment charges	0	3,732
Depreciation and amortization	33,983	36,473
Amortization of debt issuance costs	826	1,244
Share-based compensation	4,572	4,152
Deferred income taxes	(1,505)	(19,181)
Other long-term obligations	(49)	1,180
Contribution of the Company’s stock to savings and profit-sharing plan	956	1,012
Changes in operating assets and liabilities:
Accounts receivable	2,629	(4,944)
Government grants receivable	4,335	4,913
Other assets	(4,294)	(1,712)
Operating leases	(1,047)	(2,484)
Accounts payable	551	6,369
Income taxes	22,720	6,003
Taxes other than income taxes	(347)	(654)
Accrued compensation	(1,595)	6,650
Other accrued liabilities	(344)	1,102
Total adjustments	61,170	41,815
Net cash provided by (used in) operating activities	55,228	(9,681)
INVESTING ACTIVITIES:
Capital expenditures	(16,341)	(6,195)
Proceeds from disposals of property, equipment and other assets	4,821	4,297
Purchase of trading securities	0	(1,906)
Other investing activities	45	59
Net cash used in investing activities	(11,475)	(3,745)
Debt transactions:
Proceeds from borrowings on revolving credit facility	22,000	66,500
Repayment of borrowings on revolving credit facility	(22,000)	(46,500)
Repayments on short-term borrowings	(820)	(4,150)
Principal payments on long-term debt	(851)	(187)
Debt issuance costs	0	(4)
Principal payments on finance lease obligations	(1,336)	(1,329)
Equity transactions:
Treasury stock transactions, except for stock options	(1,461)	(1,236)
Exercise of stock options	79	1,374
Net cash (used in) provided by financing activities	(4,389)	14,468
Net increase in cash, cash equivalents and restricted cash	39,364	1,042
Cash, cash equivalents and restricted cash at beginning of period	24,054	14,088
Cash, cash equivalents and restricted cash at end of period	63,418	15,130
Supplemental Information:
Interest paid, net of amounts capitalized	7,054	7,719
Income taxes refunded, including interest earned	22,998	5,910
Change in accounts payable for additions to property, equipment and other assets	$ 2,003	$ 400