Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 591,310	$ 413,048
Restricted cash	2,681	2,680
Accounts receivable:
Trade, net of allowances	429,788	389,699
Other	4,210	13,098
Inventories	222,663	227,439
Other current assets	38,131	45,444
Total current assets	1,288,783	1,091,408
Property, plant and equipment, net	1,947,448	1,819,969
Intangibles, net	4,058	4,766
Investments	105,097	38,690
Restricted cash	2,264	2,308
Other assets	129,268	68,074
Total assets	3,476,918	3,025,215
Current liabilities:
Short-term borrowings and current portion of long-term debt	56,350	0
Trade accounts payable	432,490	439,663
Accrued expenses	290,843	212,964
Total current liabilities	779,683	652,627
Long-term debt	1,519,527	1,320,000
Long-term debt, related party	75,000	225,000
Pension and severance obligations	160,550	139,379
Other non-current liabilities	12,801	21,415
Total liabilities	2,547,561	2,358,421
Commitments and contingencies (Note 17)
Amkor stockholders’ equity:
Preferred stock, $0.001 par value, 10,000 shares authorized, designated Series A, none issued
Common stock, $0.001 par value, 500,000 shares authorized, 261,877 and 197,709 shares issued, and 216,513 and 152,397 shares outstanding, in 2013 and 2012, respectively	262	198
Additional paid-in capital	1,811,178	1,614,143
Accumulated deficit	(688,186)	(756,644)
Accumulated other comprehensive income	6,840	11,241
Treasury stock, at cost, 45,364 and 45,312 shares in 2013 and 2012, respectively	(211,217)	(210,983)
Total Amkor stockholders’ equity	918,877	657,955
Noncontrolling interests in subsidiaries	10,480	8,839
Total equity	929,357	666,794
Total liabilities and equity	$ 3,476,918	$ 3,025,215