CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Statement [Abstract]
Net sales	$ 1,821,793	$ 2,083,691	$ 4,751,254	$ 5,185,375
Cost of sales	1,539,040	1,662,463	4,087,210	4,189,662
Gross profit	282,753	421,228	664,044	995,713
Selling, general and administrative	73,020	67,947	216,551	213,774
Research and development	43,135	33,994	135,870	109,835
Total operating expenses	116,155	101,941	352,421	323,609
Operating income	166,598	319,287	311,623	672,104
Interest expense	13,001	14,879	43,522	43,620
Other (income) expense, net	(8,777)	(5,692)	(24,212)	(18,829)
Total other expense, net	4,224	9,187	19,310	24,791
Income before taxes	162,374	310,100	292,313	647,313
Income tax expense	28,923	3,643	49,194	44,159
Net income	133,451	306,457	243,119	603,154
Net income attributable to non-controlling interests	(837)	(376)	(868)	(1,632)
Net income attributable to Amkor	$ 132,614	$ 306,081	$ 242,251	$ 601,522
Net income attributable to Amkor per common share:
Basic (in dollars per share)	$ 0.54	$ 1.25	$ 0.99	$ 2.46
Diluted (in dollars per share)	$ 0.54	$ 1.24	$ 0.98	$ 2.45
Shares used in computing per common share amounts:
Basic (in shares)	245,740	244,744	245,571	244,581
Diluted (in shares)	247,129	246,094	247,080	246,015