XML 193 R177.htm IDEA: XBRL DOCUMENT v3.8.0.1
Business Combinations - Additional Information (Detail) - TWD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2017
May 31, 2016
Disclosure of subsidiaries [Line Items]      
Decrease in retained earnings due to retrospective adjustments $ (28,880)    
Increase in non-controlling interests due to retrospective adjustments 16,583    
TLJ Intertech Inc. [member]      
Disclosure of subsidiaries [Line Items]      
Percentage of shareholdings acquired by subsidiary   60.00% 60.00%
Total consideration was paid to key management personnel and related parties $ 89,998 $ 89,998  
TLJ Intertech Inc. [member] | Related parties [member]      
Disclosure of subsidiaries [Line Items]      
Total consideration was paid to key management personnel and related parties     $ 41,739