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CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Income Statement [Abstract]    
Net sales $ 1,321,575 $ 1,365,511
Cost of sales 1,163,992 1,163,868
Gross profit 157,583 201,643
Selling, general and administrative 80,408 90,346
Research and development 45,652 38,171
Total operating expenses 126,060 128,517
Operating income 31,523 73,126
Interest expense 16,809 16,439
Other (income) expense, net (11,075) (15,295)
Total other expense, net 5,734 1,144
Income before taxes 25,789 71,982
Income tax expense 3,936 12,196
Net income 21,853 59,786
Net income attributable to non-controlling interests (725) (889)
Net income attributable to Amkor $ 21,128 $ 58,897
Net income attributable to Amkor per common share:    
Basic (in dollars per share) $ 0.09 $ 0.24
Diluted (in dollars per share) $ 0.09 $ 0.24
Shares used in computing per common share amounts:    
Basic (in shares) 246,854 246,008
Diluted (in shares) 247,845 247,614