Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Statement [Abstract]
Net sales	$ 2,083,691	$ 1,681,000	$ 5,185,375	$ 4,413,685
Cost of sales	1,662,463	1,356,168	4,189,662	3,550,499
Gross profit	421,228	324,832	995,713	863,186
Selling, general and administrative	67,947	72,581	213,774	223,538
Research and development	33,994	40,790	109,835	128,624
Total operating expenses	101,941	113,371	323,609	352,162
Operating income	319,287	211,461	672,104	511,024
Interest expense	14,879	12,896	43,620	38,333
Other (income) expense, net	(5,692)	(501)	(18,829)	(508)
Total other expense, net	9,187	12,395	24,791	37,825
Income before taxes	310,100	199,066	647,313	473,199
Income tax expense	3,643	17,219	44,159	44,875
Net income	306,457	181,847	603,154	428,324
Net income attributable to non-controlling interests	(376)	(993)	(1,632)	(1,855)
Net income attributable to Amkor	$ 306,081	$ 180,854	$ 601,522	$ 426,469
Net income attributable to Amkor per common share:
Basic (in dollars per share)	$ 1.25	$ 0.74	$ 2.46	$ 1.75
Diluted (in dollars per share)	$ 1.24	$ 0.74	$ 2.45	$ 1.74
Shares used in computing per common share amounts:
Basic (in shares)	244,744	244,100	244,581	243,746
Diluted (in shares)	246,094	245,942	246,015	245,611