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Components of Intangible Assets (Detail) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Schedule of Intangible Assets Disclosure [Line Items]    
Goodwill, Gross $ 92,902 $ 93,895
Goodwill, Accumulated Amortization   (2,205)
Goodwill, Net 92,902 91,690
Intangible Assets Gross 393,590 393,639
Goodwill, Accumulated Impairment   (2,205)
Intangible Assets, Net (Including Goodwill) 336,434 338,847
Finite-Lived Intangible Assets, Accumulated Amortization (57,156) (52,587)
License    
Schedule of Intangible Assets Disclosure [Line Items]    
Finite-Lived Intangible Assets, Gross 15,847 15,847
Finite-Lived Intangible Assets, Accumulated Amortization (9,944) (9,825)
Finite-Lived Intangible Assets, Net 5,903 6,022
Trade Names    
Schedule of Intangible Assets Disclosure [Line Items]    
Indefinite-Lived Trade Names, Gross 58,216 58,216
Indefinite-Lived Trade Names, Net 58,216 58,216
Finite-Lived Intangible Assets, Gross 43,856 43,689
Finite-Lived Intangible Assets, Accumulated Amortization (14,874) (13,965)
Finite-Lived Intangible Assets, Net 28,982 29,724
Customer Relationships    
Schedule of Intangible Assets Disclosure [Line Items]    
Finite-Lived Intangible Assets, Gross 176,235 175,482
Finite-Lived Intangible Assets, Accumulated Amortization (30,921) (27,538)
Finite-Lived Intangible Assets, Net 145,314 147,944
Other    
Schedule of Intangible Assets Disclosure [Line Items]    
Finite-Lived Intangible Assets, Gross 6,534 6,510
Finite-Lived Intangible Assets, Accumulated Amortization (1,417) (1,259)
Finite-Lived Intangible Assets, Net $ 5,117 $ 5,251