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Commitments, Contingencies and Legal Proceedings - Additional Information (Detail) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 USD ($) Operable_Unit | Dec. 31, 2015 USD ($)
Commitments Contingencies And Litigation [Line Items] |  |
Annual payments due under operating leases | $ 23,700 |
Aggregate contractual obligation | $ 124,600 |
Number of operable units | Operable_Unit | 5 |
Increase in remediation activities reserve | $ 40,000 | $ 10,000
Reserve for Environmental liabilities, current portion | 25,000 | 12,544
Other Long-Term Liabilities [Member] |  |
Commitments Contingencies And Litigation [Line Items] |  |
Reserve for Environmental liabilities, remaining portion | 27,800 |
January 17, 2017 Consent Decree [Member] |  |
Commitments Contingencies And Litigation [Line Items] |  |
Contribution payment towards remedial action and natural resource damages | 65,000 |
Anticipated cost to complete work for remaining site remedy | 200,000 |
Expected payments for governments unreimbursed past costs which are under dispute | 34,000 |
GP [Member] | January 17, 2017 Consent Decree [Member] |  |
Commitments Contingencies And Litigation [Line Items] |  |
Contribution payment towards remedial action and natural resource damages | $ 145,000 |
Minimum [Member] | December 2009 – Long Term Monitoring Plan [Member] |  |
Commitments Contingencies And Litigation [Line Items] |  |
Period over which cash expenditure to be incurred for monitoring activities | 30 years |
Minimum [Member] | GLT, GP and NCR [Member] | January 17, 2017 Consent Decree [Member] |  |
Commitments Contingencies And Litigation [Line Items] |  |
Contribution payment towards remedial action and natural resource damages | $ 1,000,000 |
Maximum [Member] |  |
Commitments Contingencies And Litigation [Line Items] |  |
Estimated cost related to Fox River matter | 150,000 |
Maximum [Member] | January 17, 2017 Consent Decree [Member] |  |
Commitments Contingencies And Litigation [Line Items] |  |
Estimated cost related to Fox River matter | 40,000 |
OU2-5 [Member] |  |
Commitments Contingencies And Litigation [Line Items] |  |
Estimated future cost of cleanup work | $ 13,400 | $ 13,400
Expected cleanup work continuation year | through 2018 |
NCR costs and damages percentage | 100.00% |
OU2-5 [Member] | Whiting Litigation [Member] |  |
Commitments Contingencies And Litigation [Line Items] |  |
NCR costs and damages percentage | 100.00% |

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