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Components of Intangible Assets (Detail) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Schedule of Intangible Assets Disclosure [Line Items]    
Goodwill, Gross $ 15,765 $ 14,201
Goodwill, Accumulated Amortization 0 0
Goodwill, Net 15,765 14,201
Indefinite-Lived Trade Names, Gross 7,616 7,616
Indefinite-Lived Trade Names, Accumulated Amortization 0 0
Indefinite-Lived Trade Names, Net 7,616 7,616
Intangible Assets, Gross (Including Goodwill) 126,441 119,452
Finite-Lived Intangible Assets, Accumulated Amortization (36,396) (30,233)
Intangible Assets, Net (Including Goodwill) 90,045 89,219
License    
Schedule of Intangible Assets Disclosure [Line Items]    
Finite-Lived Intangible Assets, Gross 15,847 15,847
Finite-Lived Intangible Assets, Accumulated Amortization (9,255) (8,919)
Finite-Lived Intangible Assets, Net 6,592 6,928
Trade Names    
Schedule of Intangible Assets Disclosure [Line Items]    
Finite-Lived Intangible Assets, Gross 33,295 31,150
Finite-Lived Intangible Assets, Accumulated Amortization (10,421) (8,286)
Finite-Lived Intangible Assets, Net 22,874 22,864
Customer Relationships    
Schedule of Intangible Assets Disclosure [Line Items]    
Finite-Lived Intangible Assets, Gross 52,755 49,372
Finite-Lived Intangible Assets, Accumulated Amortization (15,935) (12,188)
Finite-Lived Intangible Assets, Net 36,820 37,184
Other    
Schedule of Intangible Assets Disclosure [Line Items]    
Finite-Lived Intangible Assets, Gross 1,163 1,266
Finite-Lived Intangible Assets, Accumulated Amortization (785) (840)
Finite-Lived Intangible Assets, Net $ 378 $ 426