Goodwill and Intangible Assets (Amortization) (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Amortization of finite-lived intangible assets    
2017 $ 2,654  
2018 5,113  
2019 4,971  
2020 3,972  
2021 2,196  
Thereafter 8,078  
Intangible assets, net $ 26,984 $ 23,120