XML 69 R51.htm IDEA: XBRL DOCUMENT v3.8.0.1
Property and Equipment - Estimated future amortization (Details)
$ in Thousands
Dec. 31, 2017
USD ($)
Estimated future amortization of identifiable intangible assets  
2018 $ 7,138
2019 5,792
2020 3,285
2021 835
2022 666
Thereafter 4,284
Finite-Lived Intangible Assets, Net, Total $ 22,000