XML 73 R57.htm IDEA: XBRL DOCUMENT v3.8.0.1
Goodwill and Intangible Assets - Amortization Expense Related to Intangible Assets (Detail)
$ in Thousands
Dec. 31, 2017
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
2018 $ 1,066
2019 1,053
2020 966
2021 910
2022 734
Thereafter 2,665
Total $ 7,394