XML 57 R46.htm IDEA: XBRL DOCUMENT v3.8.0.1
Goodwill and Intangible Assets - Estimated Future Amortization Expense (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Estimated future amortization expense    
2018 $ 10,428  
2019 13,905  
2020 13,905  
2021 13,905  
2022 and thereafter 104,286  
Total $ 156,429 $ 159,905