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CONSOLIDATED STATEMENTS OF INCOME - USD ($)
shares in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Income Statement [Abstract]      
Net sales $ 6,317,692 $ 6,503,065 $ 7,091,585
Cost of sales 5,384,480 5,559,912 5,761,598
Gross profit 933,212 943,153 1,329,987
Selling, general and administrative 331,806 295,393 283,372
Research and development 162,951 177,473 149,429
Total operating expenses 494,757 472,866 432,801
Operating income 438,455 470,287 897,186
Interest expense 64,945 59,000 58,563
Other (income) expense, net (57,506) (32,554) (18,309)
Total other expense, net 7,439 26,446 40,254
Income before taxes 431,016 443,841 856,932
Income tax expense 75,481 81,710 89,890
Net income 355,535 362,131 767,042
Net income attributable to noncontrolling interests (1,523) (2,318) (1,219)
Net income attributable to Amkor $ 354,012 $ 359,813 $ 765,823
Net income attributable to Amkor per common share:      
Basic (in dollars per share) $ 1.44 $ 1.46 $ 3.13
Diluted (in dollars per share) $ 1.43 $ 1.46 $ 3.11
Shares used in computing per common share amounts:      
Basic (in shares) 246,344 245,628 244,676
Diluted (in shares) 247,818 247,176 246,205