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Goodwill, Trade Names, and Other Identifiable Intangible Assets Estimated Annual Amortization Expense (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]    
2016 $ 5,623  
2017 5,578  
2018 5,493  
2019 5,457  
2020 4,873  
Thereafter 19,789  
Intangible assets subject to amortization, net carrying amount $ 46,813 $ 33,823