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Litigation and Environmental Contingencies - Environmental (Detail) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2016 USD ($) a | Dec. 31, 2015 USD ($) a | Dec. 31, 2014 USD ($)
Environmental Exit Cost [Line Items] |  |  |
Asset retirement obligation | $ 103,000 | $ 1,758,000 | $ 1,807,000
Antioch, California |  |  |
Environmental Exit Cost [Line Items] |  |  |
Area of land (in acres) | a | 25 | 289 |
Area sold without certificate of completion under voluntary remediation program | a | 80 |  |
Wyoming |  |  |
Environmental Exit Cost [Line Items] |  |  |
Environmental liability | $ 1,155,000 |  |
Paper Manufacturing Sites [Member] |  |  |
Environmental Exit Cost [Line Items] |  |  |
Insurance policy | $ 20,000,000 |  |
Length of insurance policy (in years) | 10 years |  |

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- Definition Environmental Exit Costs, Pollution Legal Liability Insurance Policy Held by Buyer, Amount + References No definition available. + Details
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- Definition Environmental Exit Costs, Pollution Legal Liability Insurance Policy Held by Buyer, Term + References No definition available. + Details
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- Definition Site Contingency, Area Sold without Certificate of Completion under Voluntary Remediation Program + References No definition available. + Details
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- Definition The carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Asset Retirement Obligation -URI http://asc.fasb.org/extlink&oid=6505190 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition The charge against earnings in the period for known or estimated future costs arising from requirements to perform environmental remediation activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13296-110859 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 + Details
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