Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 698,002	$ 894,948
Restricted cash	1,007	610
Short-term investments (amortized cost of $133,744 in 2020)	133,769	6,348
Accounts receivable, net of allowances of $863 and $1,314, respectively	962,643	850,753
Inventories	297,293	220,602
Other current assets	40,218	28,272
Total current assets	2,132,932	2,001,533
Property, plant and equipment, net	2,566,002	2,404,850
Operating lease right of use assets	147,236	148,549
Goodwill	27,325	25,976
Restricted cash	3,188	2,974
Other assets	145,628	111,733
Total assets	5,022,311	4,695,615
Current liabilities:
Short-term borrowings and current portion of long-term debt	149,007	144,479
Trade accounts payable	636,434	571,054
Capital expenditures payable	181,339	77,044
Accrued expenses	349,207	267,226
Total current liabilities	1,315,987	1,059,803
Long-term debt	1,005,339	1,305,755
Pension and severance obligations	159,610	176,971
Long-term operating lease liabilities	84,420	91,107
Other non-current liabilities	102,996	71,740
Total liabilities	2,668,352	2,705,376
Commitments and contingencies (Note 17)
Stockholders’ equity:
Preferred stock, $0.001 par value, 10,000 shares authorized, designated Series A, none issued	0	0
Common stock, $0.001 par value, 500,000 shares authorized, 288,923 and 286,877 shares issued, and 242,829 and 240,805 shares outstanding, respectively	289	287
Additional paid-in capital	1,953,378	1,927,739
Retained earnings	562,502	234,077
Accumulated other comprehensive income (loss)	27,270	19,115
Treasury stock, at cost, 46,094 and 46,072 shares, respectively	(217,740)	(217,479)
Total Amkor stockholders’ equity	2,325,699	1,963,739
Noncontrolling interests in subsidiaries	28,260	26,500
Total equity	2,353,959	1,990,239
Total liabilities and equity	$ 5,022,311	$ 4,695,615