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Intangible Assets, Net (Narrative) (Detail)
9 Months Ended
Sep. 30, 2019
Long-term Franchise Agreements and Contracts [Member]  
Acquired Finite-Lived Intangible Assets [Line Items]  
Weighted average amortization period of acquired intangible assets 19 years 2 months 12 days
Customer Lists [Member]  
Acquired Finite-Lived Intangible Assets [Line Items]  
Weighted average amortization period of acquired intangible assets 10 years
Permits and Other [Member]  
Acquired Finite-Lived Intangible Assets [Line Items]  
Weighted average amortization period of acquired intangible assets 36 years 9 months 18 days