Commitments and Contingencies - Recycling Operations - Recycling Operations (Details) $ in Thousands		1 Months Ended			6 Months Ended	216 Months Ended
	Dec. 01, 2017	Feb. 28, 2021	Apr. 30, 2020 USD ($)	Jan. 31, 2017 USD ($) Potentially_responsible_party	Feb. 29, 2024 USD ($)	Dec. 31, 2017 USD ($) Potentially_responsible_party	Aug. 31, 2023 USD ($)	Jan. 30, 2017 Party
Loss Contingencies [Line Items]
Accrual for Environmental Loss Contingencies					$ 65,690		$ 66,777
Liabilities Established					2,227
Portland Harbor Superfund Site
Loss Contingencies [Line Items]
Accrual for Environmental Loss Contingencies					6,000		5,000
Number Of Other Potentially Responsible Parties Signing Settlement Agreement and Order on Consent | Potentially_responsible_party						3
Number of Years for Pre-Remedial Design	2 years
Number Of Potentially Responsible Parties Joining Allocation Process | Potentially_responsible_party				100
Portland Harbor Superfund Site | Minimum
Loss Contingencies [Line Items]
Percentage of area require active clean up in remedial design phase		100.00%
Portland Harbor Superfund Site - River Mile 3.5
Loss Contingencies [Line Items]
Site contingency expected completion term for remedial design			4 years
Site contingency EPA estimated completion cost for remedial design			$ 4,000
Insurance receivable					2,000		$ 1,000
Portland Harbor Superfund Site - NRD
Loss Contingencies [Line Items]
Parties named in Litigation | Party								30
Portland Harbor Superfund Site - NRD | Other Noncurrent Assets
Loss Contingencies [Line Items]
Insurance receivable					2,300
Insurance liability					$ 2,300
Lower Willamette Group | Portland Harbor Superfund Site | Minimum
Loss Contingencies [Line Items]
Remedial Investigation and Feasibility Study Costs						$ 155,000
Potential Responsible Parties | Portland Harbor Superfund Site
Loss Contingencies [Line Items]
Estimated Cost of Selected Remedy Undiscounted				$ 1,700,000
Estimated Cost of Selected Remedy Discounted				$ 1,050,000
Estimated Cost of Selected Remedy, Discount Rate				7.00%
Site Contingency, Estimated Construction Time Frame				13 years
Potential Responsible Parties | Portland Harbor Superfund Site | Minimum
Loss Contingencies [Line Items]
Estimated Cost of Selected Remedy, Range				50.00%
Potential Responsible Parties | Portland Harbor Superfund Site | Maximum
Loss Contingencies [Line Items]
Estimated Cost of Selected Remedy, Range				(30.00%)