XML 69 R54.htm IDEA: XBRL DOCUMENT v3.7.0.1
Goodwill and Intangible assets - Estimated Amortization Expense of Intangible Assets (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]    
2017 $ 2,281  
2018 2,268  
2019 2,145  
2020 2,084  
2021 2,076  
Thereafter 2,419  
Total $ 13,273 $ 5,946