v3.6.0.2
Intangible assets - Future Amortization (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Amortization expense for fiscal years 2017 through 2021 and thereafter      
2017 $ 3,517    
2018 2,674    
2019 1,937    
2020 1,832    
2021 1,455    
Thereafter 2,368    
Net $ 13,783 $ 16,055 $ 19,676