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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 ($)		3 Months Ended	30 Months Ended
	Mar. 13, 2013	Mar. 31, 2016	Mar. 31, 2016	Jan. 31, 2016	Jul. 31, 2014	Oct. 09, 2013	Dec. 31, 2011
Loss Contingencies [Line Items]
Amount of withdrawal liability				$ 32,900,000	$ 39,600,000		$ 32,600,000
Payment of withdrawal liability amount		$ 12,800,000
Acquired Company [Member]
Loss Contingencies [Line Items]
Amount of withdrawal liability				$ 4,800,000		$ 4,800,000
Multiemployer plan withdrawal obligation, amount suggested by Plan which is different than amount recorded by company	$ 6,900,000
Cash proceeds deposited in Escrow account						$ 2,100,000
Payments toward the withdrawal liability assessment			$ 2,900,000
Minimum [Member]
Loss Contingencies [Line Items]
Amount of withdrawal liability		40,100,000	40,100,000
Maximum [Member]
Loss Contingencies [Line Items]
Amount of withdrawal liability		$ 55,400,000	$ 55,400,000

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- Definition

Escrowed funds to cover multiple employer plans liability of acquired company.

+ References

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- Definition

Multiemployer plan withdrawal obligation amount suggested by plan different than amount recorded by company.

+ References

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- Definition

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+ References

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- Definition

Amount of payments made 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

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- Definition

Amount of contributions made to multiemployer plans by the employer. A multiemployer plan is 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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 80
-Section 50
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=49170332&loc=SL14450702-114947

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 80
-Section 50
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=49170332&loc=SL14450691-114947

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 80
-Section 50
-Paragraph 5
-Subparagraph (e)(1)
-URI http://asc.fasb.org/extlink&oid=49170332&loc=SL14450657-114947

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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

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