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Commitments and Contingencies (Collective Bargaining Agreements) - Additional Information (Detail) - Withdrawal from Multiemployer Defined Benefit Plan [Member] - Central States Plan [Member] - USD ($) $ in Millions |  | 27 Months Ended | 43 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Mar. 13, 2013 | Dec. 31, 2016 | Dec. 31, 2016 | Jan. 31, 2016 | Jul. 31, 2014 | Oct. 09, 2013 | Dec. 31, 2011
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Amount of withdrawal liability |  |  |  | $ 32.9 | $ 39.6 |  | $ 32.6
Payment of withdrawal liability assessment amount |  | $ 17.5 |  |  |  |  |
Acquired Company [Member] |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Amount of withdrawal liability |  |  |  | $ 4.8 |  | $ 4.8 |
Payment of withdrawal liability assessment amount |  |  | $ 3.5 |  |  |  |
Multiemployer plan withdrawal obligation, amount suggested by Plan which is different than amount recorded by company | $ 6.9 |  |  |  |  |  |
Minimum [Member] |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Amount of withdrawal liability |  | 40.1 | 40.1 |  |  |  |
Maximum [Member] |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Amount of withdrawal liability |  | $ 55.4 | $ 55.4 |  |  |  |

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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 Amount of cash outflow reducing loss contingency liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 + Details
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- Definition Amount of the obligation recognized by withdrawing from a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. + References No definition available. + Details
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