Commitments and Contingencies (Collective Bargaining Agreements) - Additional Information (Detail) - Withdrawal from Multiemployer Defined Benefit Plan [Member] - Central States Plan [Member] - USD ($)		21 Months Ended	37 Months Ended
	Mar. 13, 2013	Jun. 30, 2016	Jun. 30, 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 assessment amount		$ 13,700,000
Acquired Company [Member]
Loss Contingencies [Line Items]
Amount of withdrawal liability				$ 4,800,000		$ 4,800,000
Payment of withdrawal liability assessment amount			$ 3,100,000
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
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