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Weighted Average Amortization Period for Finite Lived Intangible Assets (Detail)
12 Months Ended
Dec. 31, 2016
Trade Names  
Finite-Lived Intangible Assets [Line Items]  
Finite-lived intangible assets, weighted-average amortization periods 14 years
License  
Finite-Lived Intangible Assets [Line Items]  
Finite-lived intangible assets, weighted-average amortization periods 33 years
Customer Relationships  
Finite-Lived Intangible Assets [Line Items]  
Finite-lived intangible assets, weighted-average amortization periods 13 years
Other  
Finite-Lived Intangible Assets [Line Items]  
Finite-lived intangible assets, weighted-average amortization periods 11 years