Segment and Geographical Information - Schedule of Depreciation and Amortization and Capital Expenditures (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Depreciation and amortization	$ 134,576	$ 138,299	$ 138,371
Capital expenditures	146,279	114,672	73,492
Operating Segments | High Purity Cellulose
Segment Reporting Information [Line Items]
Depreciation and amortization	117,017	116,757	116,080
Capital expenditures	136,866	110,092	67,906
Operating Segments | Paperboard
Segment Reporting Information [Line Items]
Depreciation and amortization	13,130	14,320	15,420
Capital expenditures	3,413	2,160	1,838
Operating Segments | High-Yield Pulp
Segment Reporting Information [Line Items]
Depreciation and amortization	2,364	2,544	2,528
Capital expenditures	2,210	2,215	2,127
Corporate
Segment Reporting Information [Line Items]
Depreciation and amortization	2,065	4,678	4,343
Capital expenditures	$ 3,790	$ 205	$ 1,621