XML 153 R134.htm IDEA: XBRL DOCUMENT v3.21.1
Bonds Payable - Additional Information (Detail)
$ / shares in Units, $ in Thousands, $ in Thousands
 1 Months Ended 12 Months Ended
Dec. 31, 2017
TWD ($)
$ / shares
Dec. 31, 2019
TWD ($)
$ / shares
Dec. 31, 2020
TWD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Disclosure of detailed information about borrowings [line items]          
Bonds payable   $ 36,522,155 $ 56,253,554 $ 2,003,332  
Secured Domestic Convertible Bonds [Member]          
Disclosure of detailed information about borrowings [line items]          
Bonds face amount $ 250,000        
Bonds maturity period 3 years        
Secured domestic bonds conversion price | $ / shares $ 4.8 $ 4.8      
Bonds redemption description (1) if the closing price of AMPI’s ordinary shares on the Taipei Exchange exceeds the conversion price by 30% or more for 30 consecutive business days in the period starting from 3 months after the offering to 40 days before the maturity or (2) the outstanding amount of the bonds falls below 10% of the originally offered in the period aforementioned.        
Senior Unsecured International Corporate Bonds [Member]          
Disclosure of detailed information about borrowings [line items]          
Bonds face amount         $ 1,000
Bonds payable         300,000
Senior Unsecured International Corporate Bonds [Member] | Tranche A [Member]          
Disclosure of detailed information about borrowings [line items]          
Bonds payable         $ 200,000
Borrowings maturity   3 years      
Annual interest rates of bonds   2.15%     2.15%
Senior Unsecured International Corporate Bonds [Member] | Tranche B [Member]          
Disclosure of detailed information about borrowings [line items]          
Bonds payable         $ 100,000
Borrowings maturity   5 years      
Annual interest rates of bonds   2.50%     2.50%