Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 45,224	$ 171,228
Other comprehensive income (loss), net of tax:
Adjustments to net unrealized gains (losses) on available-for-sale debt investments	601	(1,077)
Adjustments to unrealized components of defined benefit pension plans	(97)	4
Foreign currency translation	(2,113)	(8,409)
Total other comprehensive income (loss)	(1,609)	(9,482)
Comprehensive income	43,615	161,746
Comprehensive loss (income) attributable to non-controlling interests	127	(565)
Comprehensive income attributable to Amkor	$ 43,742	$ 161,181