Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, except Per Share data	Jun. 30, 2011	Dec. 31, 2010
Amkor stockholders' equity:
Preferred stock designated Series A, par value	$ 0.001	$ 0.001
Preferred stock designated Series A, shares authorized	10,000	10,000
Preferred stock designated Series A, shares issued	0	0
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	500,000	500,000
Common stock, shares issued	197,250	183,467
Common stock, shares outstanding	197,126	183,420
Treasury stock, shares	124	47