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Components of Intangible Assets (Detail) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Schedule of Intangible Assets Disclosure [Line Items]    
Goodwill, Gross $ 98,889 $ 15,772
Goodwill, Accumulated Amortization 0 0
Goodwill, Net 98,889 15,772
Indefinite-Lived Trade Names, Gross 64,816 7,616
Indefinite-Lived Trade Names, Accumulated Amortization 0 0
Indefinite-Lived Trade Names, Net 64,816 7,616
Intangible Assets, Gross (Including Goodwill) 412,666 126,729
Finite-Lived Intangible Assets, Accumulated Amortization (41,579) (38,250)
Intangible Assets, Net (Including Goodwill) 371,087 88,479
License    
Schedule of Intangible Assets Disclosure [Line Items]    
Finite-Lived Intangible Assets, Gross 15,847 15,847
Finite-Lived Intangible Assets, Accumulated Amortization (9,489) (9,375)
Finite-Lived Intangible Assets, Net 6,358 6,472
Trade Names    
Schedule of Intangible Assets Disclosure [Line Items]    
Finite-Lived Intangible Assets, Gross 33,841 33,368
Finite-Lived Intangible Assets, Accumulated Amortization (11,926) (11,109)
Finite-Lived Intangible Assets, Net 21,915 22,259
Customer Relationships    
Schedule of Intangible Assets Disclosure [Line Items]    
Finite-Lived Intangible Assets, Gross 193,492 52,961
Finite-Lived Intangible Assets, Accumulated Amortization (19,298) (16,966)
Finite-Lived Intangible Assets, Net 174,194 35,995
Other    
Schedule of Intangible Assets Disclosure [Line Items]    
Finite-Lived Intangible Assets, Gross 5,781 1,165
Finite-Lived Intangible Assets, Accumulated Amortization (866) (800)
Finite-Lived Intangible Assets, Net $ 4,915 $ 365