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Commitments and Contingencies - Additional Information (Detail)
12 Months Ended
Dec. 11, 2015
USD ($)
Dec. 31, 2015
USD ($)
Property
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Commitments and Contingencies Disclosure [Line Items]        
Expiration year of lease agreements   2029    
Rent and related expense   $ 17,400,000 $ 15,800,000 $ 14,300,000
Sublease rental income   $ 0 $ 0 $ 0
Number of leased properties | Property   2    
Lease payments   $ 850,000    
Lease agreement expiration year   2020    
Royalty license expiration year   2023    
Capital cost        
Commitments and Contingencies Disclosure [Line Items]        
Remedial alternative, EPA preferred remedy $ 7,300,000