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Summary of Significant Accounting Policies - Schedule of Useful Lives (Detail)
12 Months Ended
Dec. 31, 2015
Minimum [Member] | Buildings [Member]  
Property Plant And Equipment [Line Items]  
Useful life, in years 25 years
Minimum [Member] | Plant equipment and instrumentation [Member]  
Property Plant And Equipment [Line Items]  
Useful life, in years 2 years
Minimum [Member] | Furniture and fixtures [Member]  
Property Plant And Equipment [Line Items]  
Useful life, in years 4 years
Minimum [Member] | Software [Member]  
Property Plant And Equipment [Line Items]  
Useful life, in years 3 years
Maximum [Member] | Buildings [Member]  
Property Plant And Equipment [Line Items]  
Useful life, in years 33 years
Maximum [Member] | Plant equipment and instrumentation [Member]  
Property Plant And Equipment [Line Items]  
Useful life, in years 10 years
Maximum [Member] | Furniture and fixtures [Member]  
Property Plant And Equipment [Line Items]  
Useful life, in years 8 years
Maximum [Member] | Software [Member]  
Property Plant And Equipment [Line Items]  
Useful life, in years 7 years