Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 814,343	$ 695,087	$ 682,798
Total other comprehensive income (loss)	20,672	49,165	5,592
Ending balance	829,313	814,343	695,087
Tax effects of foreign translation adjustment	0	0	0
Pension
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Pension settlement gain (loss), reclassification adjustment before tax	(964)	(7,618)	1,571
U.S. | Pension
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Pension settlement gain (loss), reclassification adjustment before tax		(6,000)
Canada | Pension
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Pension settlement gain (loss), reclassification adjustment before tax	(1,000)	(2,000)	3,000
Unrecognized components of employee benefit plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(76,849)	(146,614)	(126,638)
Other comprehensive gain (loss) before reclassifications	38,105	63,147	(37,515)
Income tax on other comprehensive gain (loss)	(9,229)	(13,365)	8,940
Total other comprehensive income (loss)	33,155	69,765	(19,976)
Ending balance	(43,694)	(76,849)	(146,614)
Pension settlement loss
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Reclassifications to earnings	0	7,618	(2,548)
Amortization of losses
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Reclassifications to earnings	5,534	15,491	12,838
Amortization of prior service costs
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Reclassifications to earnings	25	550	564
Income tax on reclassifications
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Income tax on reclassifications	(1,280)	(6,649)	(2,255)
Plans included in sale of assets to GreenFirst
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Reclassifications to earnings	0	4,012	0
Income tax on reclassifications	0	(1,039)	0
Unrealized gain on derivative instruments, net of tax
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(847)	1,834	1,290
Other comprehensive gain (loss) before reclassifications	0	0	(8,788)
Income tax on other comprehensive gain (loss)	0	0	2,171
Income tax on reclassifications	(43)	1,010	(2,202)
Total other comprehensive income (loss)	280	(2,681)	544
Ending balance	(567)	(847)	1,834
Foreign currency translation
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(6,774)	11,145	(13,879)
Total other comprehensive income (loss)	(12,763)	(17,919)	25,024
Ending balance	(19,537)	(6,774)	11,145
Accumulated Other Comprehensive Loss
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(84,470)	(133,635)	(139,227)
Total other comprehensive income (loss)	20,672	49,165	5,592
Ending balance	(63,798)	(84,470)	(133,635)
Interest rate swaps | Unrealized gain on derivative instruments, net of tax
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Reclassifications to earnings	0	0	2,666
Foreign exchange contracts | Unrealized gain on derivative instruments, net of tax
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Reclassifications to earnings	$ 323	$ (3,691)	$ 6,697