INTERIM CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Cash flows from (used in) operating activities
Net income (loss)	$ (30,578,000)	$ 88,897,000
Adjustments to reconcile net income (loss) to cash flows from operating activities
Depreciation and amortization	47,591,000	32,116,000
Deferred income tax provision (recovery)	(9,944,000)	8,383,000
Inventory impairment	15,200,000	0	$ 0
Defined benefit pension plans and other post-retirement benefit plan expense	446,000	438,000
Stock compensation expense	1,226,000	949,000
Foreign exchange transaction losses (gains)	270,000	(3,828,000)
Other	(1,149,000)	(801,000)
Defined benefit pension plans and other post-retirement benefit plan contributions	(247,000)	(1,194,000)
Changes in working capital
Accounts receivable	11,342,000	(52,127,000)
Inventories	(86,434,000)	(1,725,000)
Accounts payable and accrued expenses	309,000	(567,000)
Other	2,318,000	(1,731,000)
Net cash from (used in) operating activities	(49,650,000)	68,810,000
Cash flows from (used in) investing activities
Purchase of property, plant and equipment	(33,429,000)	(33,293,000)
Property insurance proceeds	0	6,410,000
Purchase of amortizable intangible assets	(16,000)	(60,000)
Other	821,000	153,000
Net cash from (used in) investing activities	(32,624,000)	(26,790,000)
Cash flows from (used in) financing activities
Proceeds from revolving credit facilities, net	30,102,000	30,504,000
Payment of debt issuance costs	0	(1,184,000)
Proceeds from government grants	0	1,067,000
Payment of finance lease obligations	(1,889,000)	(4,935,000)
Other	(114,000)	(843,000)
Net cash from (used in) financing activities	28,099,000	24,609,000
Effect of exchange rate changes on cash and cash equivalents	703,000	(1,534,000)
Net increase (decrease) in cash and cash equivalents	(53,472,000)	65,095,000
Cash and cash equivalents, beginning of period	354,032,000	345,610,000	345,610,000
Cash and cash equivalents, end of period	300,560,000	410,705,000	$ 354,032,000
Supplemental cash flow disclosure:
Cash paid for interest	33,240,000	32,073,000
Cash paid for income taxes	$ 1,773,000	$ 18,900,000