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Bonds Payable - Summary of Bonds Payable (Parenthetical) (Detail)
$ in Thousands, $ in Thousands
Dec. 31, 2021
TWD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Repayable at maturity in January 2021 [member]      
Disclosure of detailed information about borrowings [line items]      
Interest rate 1.30% 1.30% 1.30%
Repayable at maturity in January 2023 [member]      
Disclosure of detailed information about borrowings [line items]      
Interest rate 1.50% 1.50% 1.50%
Repayable at maturity in January 2022 [member]      
Disclosure of detailed information about borrowings [line items]      
Interest rate 1.25% 1.25% 1.25%
Repayable at maturity in January 2024 [member]      
Disclosure of detailed information about borrowings [line items]      
Interest rate 1.45% 1.45% 1.45%
Repayable at maturity in April 2024 [Member]      
Disclosure of detailed information about borrowings [line items]      
Interest rate 0.90% 0.90% 0.90%
Repayable at maturity in April 2026 [Member]      
Disclosure of detailed information about borrowings [line items]      
Interest rate 1.03% 1.03% 1.03%
Repayable at maturity in October 2022 [Member]      
Disclosure of detailed information about borrowings [line items]      
Interest rate 2.15% 2.15% 2.15%
Notional Amount   $ 200,000 $ 200,000
Repayable at maturity in October 2024 [Member]      
Disclosure of detailed information about borrowings [line items]      
Interest rate 2.50% 2.50% 2.50%
Notional Amount   $ 100,000 $ 100,000
Repayable at maturity in April 2025 [Member]      
Disclosure of detailed information about borrowings [line items]      
Interest rate 0.90% 0.90% 0.90%
Repayable at maturity in August 2023 [Member]      
Disclosure of detailed information about borrowings [line items]      
Interest rate 0.72% 0.72% 0.72%
Repayable at maturity in August 2025 [Member]      
Disclosure of detailed information about borrowings [line items]      
Interest rate 0.85% 0.85% 0.85%
Repayable at maturity in August 2027 [Member]      
Disclosure of detailed information about borrowings [line items]      
Interest rate 0.95% 0.95% 0.95%
Repayable at Maturity in March 2027 [Member]      
Disclosure of detailed information about borrowings [line items]      
Notional Amount $ 779,801    
Repayable at Maturity in March 2027 [Member] | Interest Rate Period One [Member]      
Disclosure of detailed information about borrowings [line items]      
Interest rate 0.10% 0.10%  
Repayable at Maturity in March 2027 [Member] | Interest Rate Period Two [Member]      
Disclosure of detailed information about borrowings [line items]      
Interest rate 0.20% 0.20%  
Repayable at Maturity in March 2027 [Member] | Interest Rate Period Three [Member]      
Disclosure of detailed information about borrowings [line items]      
Interest rate 0.60% 0.60%  
Repayable at Maturity in March 2027 [Member] | Interest Rate Period Four [Member]      
Disclosure of detailed information about borrowings [line items]      
Interest rate 1.30% 1.30%  
Repayable at Maturity in March 2027 [Member] | Interest Rate Period Five [Member]      
Disclosure of detailed information about borrowings [line items]      
Interest rate 1.80% 1.80%  
Repayable at Maturity in March 2027 [Member] | Interest Rate Period Six [Member]      
Disclosure of detailed information about borrowings [line items]      
Interest rate 2.00% 2.00%