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Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Goodwill And Intangible Assets [Line Items]      
Amortization expense related to finite lived intangible assets $ 5,315 $ 5,769 $ 6,029
Amortization of finite lived intangible assets for 2016 5,100    
Amortization of finite lived intangible assets for 2017 5,100    
Amortization of finite lived intangible assets for 2018 5,100    
Amortization of finite lived intangible assets for 2019 5,100    
Amortization of finite lived intangible assets for 2020 $ 5,100