XML 114 R107.htm IDEA: XBRL DOCUMENT v3.8.0.1
Income Tax Expense - Reconciliation of Income Tax Expense (Parenthetical) (Detail)
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Reconciliation of accounting profit multiplied by applicable tax rates [Abstract]      
Applicable income tax rate 15.00% 15.00% 15.00%