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Business Combinations - Summary of Assets Acquired and Liabilities Assumed at the Date of Acquisition (Detail) - Dec. 31, 2024
$ in Thousands, $ in Thousands
TWD ($)
USD ($)
HIRSCHMANN [Member]    
Disclosure of detailed information about business combination [Line Items]    
Cash and cash equivalents $ 118,419  
Trade and other receivables 1,336,203  
Inventories 1,079,301  
Property, plant and equipment 745,660  
Right-of-use assets 143,629  
Others 167,521  
Trade and other payables (745,653)  
Lease liabilities (143,629)  
Net defined benefit liabilities (204,975)  
Others (200,276)  
Fair value of identifiable net assets acquired 2,296,200  
ASEPCAYMAN [Member]    
Disclosure of detailed information about business combination [Line Items]    
Cash and cash equivalents 404,573 $ 12,338
Trade and other receivables 213,592 6,514
Inventories 58,564 1,786
Property, plant and equipment 919,648 28,046
Right-of-use assets 0 0
Others 69,707 2,126
Trade and other payables (263,095) (8,023)
Lease liabilities 0 0
Net defined benefit liabilities (158,053) (4,820)
Others (71,848) (2,191)
Fair value of identifiable net assets acquired 1,173,088 35,776
CHE [Member]    
Disclosure of detailed information about business combination [Line Items]    
Cash and cash equivalents 1,381,103 42,120
Trade and other receivables 87,935 2,682
Inventories 112,115 3,419
Property, plant and equipment 421,792 12,863
Right-of-use assets 96,894 2,955
Others 197,450 6,022
Trade and other payables (200,453) (6,113)
Lease liabilities (96,894) (2,955)
Net defined benefit liabilities 0 0
Others (54,264) (1,655)
Fair value of identifiable net assets acquired $ 1,945,678 $ 59,338