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Goodwill and Other Intangible Assets - Schedule of Goodwill and Other Intangible Assets (Detail) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]    
Goodwill $ 139,304 $ 139,304
Trade names, Gross Carrying Amount 27,979 27,979
Gross Carrying Amount 167,283 167,283
Accumulated Amortization (6,990) (6,856)
Trade names, Net Carrying Amount 20,989 21,123
Net Carrying Amount $ 160,293 $ 160,427