XML 116 R102.htm IDEA: XBRL DOCUMENT v3.8.0.1
Other Financial Assets and Financial Liabilities - Foreign Currency Forward Contracts (Detail) - Foreign currency forward contracts [Member] - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Disclosure Of Financial Instruments [Line Items]    
Assets $ 0 $ 187
Liabilities $ 139 $ 0