Amkor Technology (AMKR) 10-Q 1 Aug 23 2023 Q2 Quarterly report Financial data

COVER PAGE

COVER PAGE - shares	6 Months Ended
	Jun. 30, 2023	Jul. 27, 2023
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2023
Document Transition Report	false
Entity File Number	000-29472
Entity Registrant Name	AMKOR TECHNOLOGY, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	23-1722724
Entity Address, Address Line One	2045 East Innovation Circle
Entity Address, City or Town	Tempe
Entity Address, State or Province	AZ
Entity Address, Postal Zip Code	85284
City Area Code	480
Local Phone Number	821-5000
Title of 12(b) Security	Common Stock, $0.001 par value
Trading Symbol	AMKR
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		245,729,666
Entity Central Index Key	0001047127
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q2
Amendment Flag	false

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Income Statement [Abstract]
Net sales	$ 1,457,922	$ 1,504,868	$ 2,929,461	$ 3,101,684
Cost of sales	1,271,052	1,255,713	2,548,170	2,527,199
Gross profit	186,870	249,155	381,291	574,485
Selling, general and administrative	64,860	68,868	143,531	145,827
Research and development	45,688	37,478	92,735	75,841
Total operating expenses	110,548	106,346	236,266	221,668
Operating income	76,322	142,809	145,025	352,817
Interest expense	14,354	14,593	30,521	28,741
Other (income) expense, net	(11,883)	(8,041)	(15,435)	(13,137)
Total other expense, net	2,471	6,552	15,086	15,604
Income before taxes	73,851	136,257	129,939	337,213
Income tax expense	9,407	10,788	20,271	40,516
Net income	64,444	125,469	109,668	296,697
Net income attributable to non-controlling interests	(158)	(691)	(31)	(1,256)
Net income attributable to Amkor	$ 64,286	$ 124,778	$ 109,637	$ 295,441
Net income attributable to Amkor per common share:
Basic (in dollars per share)	$ 0.26	$ 0.51	$ 0.45	$ 1.21
Diluted (in dollars per share)	$ 0.26	$ 0.51	$ 0.44	$ 1.20
Shares used in computing per common share amounts:
Basic (in shares)	245,637	244,592	245,485	244,498
Diluted (in shares)	246,964	245,855	247,046	245,938

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 64,444	$ 125,469	$ 109,668	$ 296,697
Other comprehensive income (loss), net of tax:
Adjustments to net unrealized gains (losses) on available-for-sale debt investments	(510)	(630)	92	(1,707)
Adjustments to unrealized components of defined benefit pension plans	(97)	5	(195)	9
Foreign currency translation	(13,051)	(15,618)	(15,164)	(24,027)
Total other comprehensive income (loss)	(13,658)	(16,243)	(15,267)	(25,725)
Comprehensive income	50,786	109,226	94,401	270,972
Comprehensive income attributable to non-controlling interests	(158)	(691)	(31)	(1,256)
Comprehensive income attributable to Amkor	$ 50,628	$ 108,535	$ 94,370	$ 269,716

CONSOLIDATED BALANCE SHEETS (Un

CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 804,834	$ 959,072
Short-term investments (amortized cost of $400,792 and $283,641 in 2023 and 2022, respectively)	399,233	281,964
Accounts receivable, net of allowances	1,198,612	1,365,504
Inventories	534,477	629,576
Other current assets	61,890	65,123
Total current assets	2,999,046	3,301,239
Property, plant and equipment, net	3,309,592	3,135,614
Operating lease right of use assets	146,080	171,163
Goodwill	19,550	21,517
Restricted cash	3,428	3,334
Other assets	160,484	188,890
Total assets	6,638,180	6,821,757
Current liabilities:
Short-term borrowings and current portion of long-term debt	155,978	143,813
Trade accounts payable	701,610	899,164
Capital expenditures payable	310,387	146,602
Short-term operating lease liability	53,991	70,991
Accrued expenses	354,522	401,841
Total current liabilities	1,576,488	1,662,411
Long-term debt	975,535	1,088,521
Pension and severance obligations	88,249	93,540
Long-term operating lease liabilities	66,030	75,745
Other non-current liabilities	169,019	201,839
Total liabilities	2,875,321	3,122,056
Commitments and contingencies (Note 15)
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; 291,958 and 291,249 shares issued; and 245,689 and 245,091 shares outstanding in 2023 and 2022, respectively	292	291
Additional paid-in capital	2,005,055	1,996,344
Retained earnings	1,947,420	1,874,644
Accumulated other comprehensive income (loss)	1,432	16,699
Treasury stock, at cost, 46,269 and 46,158 shares in 2023 and 2022, respectively	(222,049)	(219,226)
Total Amkor stockholders’ equity	3,732,150	3,668,752
Non-controlling interests in subsidiaries	30,709	30,949
Total equity	3,762,859	3,699,701
Total liabilities and equity	$ 6,638,180	$ 6,821,757

CONSOLIDATED BALANCE SHEETS (_2

CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Short term investments amortized cost	$ 400,792	$ 283,641
Stockholders’ equity:
Preferred stock designated Series A, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock designated Series A, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock designated Series A, shares issued (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	500,000,000	500,000,000
Common stock, shares issued (in shares)	291,958,000	291,249,000
Common stock, shares outstanding (in shares)	245,689,000	245,091,000
Treasury stock, shares (in shares)	46,269,000	46,158,000

CONSOLIDATED STATEMENTS OF STOC

CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Total Amkor Stockholders’ Equity	Common Stock	Additional Paid- In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Noncontrolling Interest in Subsidiaries
Balance at beginning of period, common stock (in shares) at Dec. 31, 2021			290,466
Balance at beginning of period at Dec. 31, 2021	$ 2,972,546	$ 2,942,276	$ 290	$ 1,977,134	$ 1,163,939	$ 19,978	$ (219,065)	$ 30,270
Balance at beginning of period, treasury stock (in shares) at Jun. 30, 2022							(46,155)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	296,697	295,441			295,441			1,256
Other comprehensive income (loss)	(25,725)	(25,725)				(25,725)
Treasury stock acquired through surrender of shares for tax withholding (in shares)							(4)
Treasury stock acquired through surrender of shares for tax withholding	(82)	(82)					$ (82)
Issuance of stock through share-based compensation plans (in shares)			322
Issuance of stock through share-based compensation plans	1,740	1,740	$ 1	1,739
Share-based compensation	7,119	7,119		7,119
Cash dividends declared	(24,474)	(24,474)			(24,474)
Subsidiary dividends to non-controlling interests	(271)							(271)
Balance at end of period, common stock (in shares) at Jun. 30, 2022			290,788
Balance at end of period at Jun. 30, 2022	3,227,550	3,196,295	$ 291	1,985,992	1,434,906	(5,747)	$ (219,147)	31,255
Balance at end of period, treasury stock (in shares) at Dec. 31, 2021							(46,151)
Balance at beginning of period, common stock (in shares) at Mar. 31, 2022			290,687
Balance at beginning of period at Mar. 31, 2022	3,126,822	3,096,123	$ 291	1,982,113	1,322,370	10,496	$ (219,147)	30,699
Balance at beginning of period, treasury stock (in shares) at Jun. 30, 2022							(46,155)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	125,469	124,778			124,778			691
Other comprehensive income (loss)	(16,243)	(16,243)				(16,243)
Issuance of stock through share-based compensation plans (in shares)			101
Issuance of stock through share-based compensation plans	258	258		258
Share-based compensation	3,621	3,621		3,621
Cash dividends declared	(12,242)	(12,242)			(12,242)
Subsidiary dividends to non-controlling interests	(135)							(135)
Balance at end of period, common stock (in shares) at Jun. 30, 2022			290,788
Balance at end of period at Jun. 30, 2022	$ 3,227,550	3,196,295	$ 291	1,985,992	1,434,906	(5,747)	$ (219,147)	31,255
Balance at end of period, treasury stock (in shares) at Mar. 31, 2022							(46,155)
Balance at beginning of period, common stock (in shares) at Dec. 31, 2022	245,091		291,249
Balance at beginning of period at Dec. 31, 2022	$ 3,699,701	3,668,752	$ 291	1,996,344	1,874,644	16,699	$ (219,226)	30,949
Balance at beginning of period, treasury stock (in shares) at Jun. 30, 2023	(46,269)						(46,269)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 109,668	109,637			109,637			31
Other comprehensive income (loss)	(15,267)	(15,267)				(15,267)
Treasury stock acquired through surrender of shares for tax withholding (in shares)							(111)
Treasury stock acquired through surrender of shares for tax withholding	(2,823)	(2,823)					$ (2,823)
Issuance of stock through share-based compensation plans (in shares)			709
Issuance of stock through share-based compensation plans	1,925	1,925	$ 1	1,924
Share-based compensation	6,787	6,787		6,787
Cash dividends declared	(36,861)	(36,861)			(36,861)
Subsidiary dividends to non-controlling interests	$ (271)							(271)
Balance at end of period, common stock (in shares) at Jun. 30, 2023	245,689		291,958
Balance at end of period at Jun. 30, 2023	$ 3,762,859	3,732,150	$ 292	2,005,055	1,947,420	1,432	$ (222,049)	30,709
Balance at end of period, treasury stock (in shares) at Dec. 31, 2022	(46,158)						(46,158)
Balance at beginning of period, common stock (in shares) at Mar. 31, 2023			291,814
Balance at beginning of period at Mar. 31, 2023	$ 3,727,163	3,696,477	$ 292	2,001,575	1,901,569	15,090	$ (222,049)	30,686
Balance at beginning of period, treasury stock (in shares) at Jun. 30, 2023	(46,269)						(46,269)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 64,444	64,286			64,286			158
Other comprehensive income (loss)	(13,658)	(13,658)				(13,658)
Issuance of stock through share-based compensation plans (in shares)			144
Issuance of stock through share-based compensation plans	401	401		401
Share-based compensation	3,079	3,079		3,079
Cash dividends declared	(18,435)	(18,435)			(18,435)
Subsidiary dividends to non-controlling interests	$ (135)							(135)
Balance at end of period, common stock (in shares) at Jun. 30, 2023	245,689		291,958
Balance at end of period at Jun. 30, 2023	$ 3,762,859	$ 3,732,150	$ 292	$ 2,005,055	$ 1,947,420	$ 1,432	$ (222,049)	$ 30,709
Balance at end of period, treasury stock (in shares) at Mar. 31, 2023							(46,269)

CONSOLIDATED STATEMENTS OF ST_2

CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY (Unaudited) (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Statement of Stockholders' Equity [Abstract]
Cash dividends declared per common share (in dollars per share)	$ 0.075	$ 0.05	$ 0.15	$ 0.10

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Cash flows from operating activities:
Net income	$ 109,668	$ 296,697
Depreciation and amortization	314,647	299,341
Other operating activities and non-cash items	4,784	(10,041)
Changes in assets and liabilities	(6,521)	(123,728)
Net cash provided by operating activities	422,578	462,269
Cash flows from investing activities:
Payments for property, plant and equipment	(282,309)	(340,208)
Proceeds from sale of property, plant and equipment	1,107	773
Proceeds from foreign exchange forward contracts	22,451	6,704
Payments for foreign exchange forward contracts	(50,170)	(66,898)
Payments for short-term investments	(355,135)	(298,351)
Proceeds from sale of short-term investments	47,000	14,120
Proceeds from maturities of short-term investments	193,315	155,910
Other investing activities	4,869	1,278
Net cash used in investing activities	(418,872)	(526,672)
Cash flows from financing activities:
Proceeds from revolving credit facilities	370,000	0
Payments of revolving credit facilities	(370,000)	0
Proceeds from short-term debt	11,043	18,112
Payments of short-term debt	(11,149)	(12,048)
Proceeds from issuance of long-term debt	0	190,000
Payments of long-term debt	(72,061)	(155,284)
Payments of finance lease obligations	(31,129)	(15,943)
Payments of dividends	(36,874)	(24,473)
Other financing activities	(1,589)	(5,089)
Net cash used in financing activities	(141,759)	(4,725)
Effect of exchange rate fluctuations on cash, cash equivalents and restricted cash	(16,091)	(25,020)
Net decrease in cash, cash equivalents and restricted cash	(154,144)	(94,148)
Cash, cash equivalents and restricted cash, beginning of period	962,406	831,521
Cash, cash equivalents and restricted cash, end of period	808,262	737,373
Non-cash investing and financing activities:
Property, plant and equipment included in capital expenditures payable	294,094	312,866
Right of use assets acquired through finance lease liabilities	26,053	33,629
Right of use assets acquired through operating lease liabilities	$ 3,651	$ 31,923

Interim Financial Statements

Interim Financial Statements	6 Months Ended
	Jun. 30, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Interim Financial Statements	Interim Financial Statements Basis of Presentation. The Consolidated Financial Statements and related disclosures as of June 30, 2023, and for the three and six months ended June 30, 2023 and 2022, contained in this Form 10-Q (the “Consolidated Financial Statements”) are unaudited pursuant to the rules and regulations of the SEC. The December 31, 2022 Consolidated Balance Sheet data contained in this Form 10-Q was derived from audited financial statements but does not include all disclosures required by accounting principles generally accepted in the United States of America (“U.S. GAAP”). Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to SEC rules and regulations. In our opinion, the Consolidated Financial Statements include all adjustments (consisting only of normal recurring adjustments) necessary for the fair statement of the results for the interim periods and should be read in conjunction with the financial statements included in the 2022 Form 10-K. The results of operations for the three and six months ended June 30, 2023 are not necessarily indicative of the results to be expected for the full year ending December 31, 2023. Unless the context otherwise requires, all references to “Amkor,” “we,” “us” or “our” are to Amkor Technology, Inc. and its wholly and majority-owned subsidiaries. Use of Estimates. The Consolidated Financial Statements have been prepared in conformity with U.S. GAAP, using management’s best estimates and judgments where appropriate. These estimates and judgments affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements. The estimates and judgments will also affect the reported amounts for certain revenues and expenses during the reporting period. Actual results could differ materially from these estimates and judgments as a result of, for example, any worsening of the global business and economic environment. Goodwill. The balance of goodwill in the Consolidated Balance Sheets contained in this Form 10-Q reflects adjustments for foreign currency translation. Unbilled Receivables . Total unbilled receivables as of June 30, 2023 and December 31, 2022 were $268.3 million and $301.7 million, respectively. Contract Liabilities. Contract liabilities were $150.5 million and $170.6 million as of June 30, 2023 and December 31, 2022, respectively. As of June 30, 2023 and December 31, 2022, the short-term portions of the liabilities were $75.9 million and $81.5 million, respectively. The remainder of the June 30, 2023 contract liability balance is expected to be recognized in revenue over the next 1-5 years. Revenue recognized during the six months ended June 30, 2023 and 2022 that was included in the contract liabilities balance at the beginning of the period was $39.2 million and $55.7 million, respectively.

Net Sales by Product Group and

Net Sales by Product Group and End Market	6 Months Ended
	Jun. 30, 2023
Revenue from Contract with Customer [Abstract]
Net Sales by Product Group and End Market	Net Sales by Product Group and End Market The following table presents our net sales by product group: For the Three Months Ended June 30, For the Six Months Ended June 30, 2023 2022 2023 2022 (In thousands) (In thousands) Advanced products (1) $ 1,084,361 $ 1,083,721 $ 2,151,738 $ 2,240,229 Mainstream products (2) 373,561 421,147 777,723 861,455 Total net sales $ 1,457,922 $ 1,504,868 $ 2,929,461 $ 3,101,684 (1) Advanced products include flip chip, memory and wafer-level processing and related test services. (2) Mainstream products include all other wirebond packaging and related test services. Net sales by end market consist of the following: For the Three Months Ended June 30, For the Six Months Ended June 30, 2023 2022 2023 2022 Communications (smartphones, tablets) 41 % 37 % 43 % 39 % Automotive, industrial and other (ADAS, electrification, infotainment, safety) 23 % 23 % 25 % 22 % Computing (data center, infrastructure, PC/laptop, storage) 20 % 18 % 18 % 18 % Consumer (AR & gaming, connected home, home electronics, wearables) 16 % 22 % 14 % 21 % Total net sales 100 % 100 % 100 % 100 %

Other Income and Expense

Other Income and Expense	6 Months Ended
	Jun. 30, 2023
Other Income and Expenses [Abstract]
Other Income and Expense	Other Income and Expense Other income and expense consist of the following: For the Three Months Ended June 30, For the Six Months Ended June 30, 2023 2022 2023 2022 (In thousands) Interest income $ (12,019) $ (1,941) $ (22,452) $ (2,544) Foreign currency loss (gain), net 49 (6,254) 6,812 (10,555) Loss on debt retirement — 367 — 464 Other 87 (213) 205 (502) Total other (income) expense, net $ (11,883) $ (8,041) $ (15,435) $ (13,137)

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2023
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Income tax expense of $20.3 million for the six months ended June 30, 2023 reflects income taxes, foreign withholding taxes and minimum taxes. In July 2023, our subsidiary in Singapore was granted a renewal of a reduced tax rate through the end of 2028, subject to certain conditions and commitments. We monitor on an ongoing basis our ability to utilize our deferred tax assets and whether there is a need for a related valuation allowance. In evaluating our ability to recover our deferred tax assets in the jurisdictions from which they arise, we consider all available positive and negative evidence, including scheduled reversals of deferred tax liabilities, projected future taxable income, tax-planning strategies and recent results of operations. We maintain a valuation allowance on certain U.S. and foreign deferred tax assets. Such valuation allowances are released as the related tax benefits are realized or when sufficient evidence exists to conclude that it is more likely than not that the deferred tax assets will be realized. Unrecognized tax benefits represent reserves for potential tax deficiencies or reductions in tax benefits that could result from federal, state or foreign tax audits. Gross unrecognized tax benefits decreased from $33.3 million as of December 31, 2022 to $31.0 million as of June 30, 2023. All of our unrecognized tax benefits would reduce our effective tax rate if recognized. Our unrecognized tax benefits are subject to change for effective settlement of examinations, changes in the recognition threshold of tax positions, the expiration of statutes of limitations and other factors.

Earnings Per Share

Earnings Per Share	6 Months Ended
	Jun. 30, 2023
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share Basic earnings per share (“EPS”) is computed by dividing net income attributable to Amkor common stockholders by the weighted-average number of common shares outstanding during the period. The weighted-average number of common shares outstanding is reduced for treasury stock. Diluted EPS is computed based on the weighted-average number of common shares outstanding plus the effect of dilutive potential common shares outstanding during the period. Dilutive potential common shares include outstanding stock options, performance-vested restricted stock units, time-vested restricted stock units and unvested restricted shares. The following table summarizes the computation of basic and diluted EPS: For the Three Months Ended June 30, For the Six Months Ended June 30, 2023 2022 2023 2022 (In thousands, Net income attributable to Amkor common stockholders $ 64,286 $ 124,778 $ 109,637 $ 295,441 Weighted-average number of common shares outstanding - basic 245,637 244,592 245,485 244,498 Effect of dilutive securities: Share-based awards 1,327 1,263 1,561 1,440 Weighted-average number of common shares outstanding - diluted 246,964 245,855 247,046 245,938 Net income attributable to Amkor per common share: Basic $ 0.26 $ 0.51 $ 0.45 $ 1.21 Diluted 0.26 0.51 0.44 1.20 The following table summarizes the potential shares of common stock that were excluded from diluted EPS because the effect of including these potential shares was anti-dilutive: For the Three Months Ended June 30, For the Six Months Ended June 30, 2023 2022 2023 2022 (In thousands) Share-based awards — 367 — 290

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	6 Months Ended
	Jun. 30, 2023
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) Changes in accumulated other comprehensive income (loss), net of tax, consist of the following: Unrealized Gains (Losses) on Available-for-Sale Debt Investments (1) Defined Benefit Pension (2) Foreign Currency Translation Total (In thousands) Accumulated other comprehensive income (loss) at December 31, 2022 $ (1,573) $ 14,220 $ 4,052 $ 16,699 Other comprehensive income (loss) before reclassifications 176 — (15,164) (14,988) Amounts reclassified from accumulated other comprehensive income (loss) (84) (195) — (279) Other comprehensive income (loss) 92 (195) (15,164) (15,267) Accumulated other comprehensive income (loss) at June 30, 2023 $ (1,481) $ 14,025 $ (11,112) $ 1,432 Unrealized Gains (Losses) on Available-for-Sale Debt Investments (1) Defined Benefit Pension (2) Foreign Currency Translation Total (In thousands) Accumulated other comprehensive income (loss) at December 31, 2021 $ (348) $ 5,616 $ 14,710 $ 19,978 Other comprehensive income (loss) before reclassifications (1,719) — (24,027) (25,746) Amounts reclassified from accumulated other comprehensive income (loss) 12 9 — 21 Other comprehensive income (loss) (1,707) 9 (24,027) (25,725) Accumulated other comprehensive income (loss) at June 30, 2022 $ (2,055) $ 5,625 $ (9,317) $ (5,747) (1) Amounts reclassified out of accumulated other comprehensive income (loss) are included as other (income) expense, net (Note 3). (2) Amounts reclassified out of accumulated other comprehensive income (loss) are included as a component of net periodic pension cost (Note 12) or other (income) expense, net (Note 3).

Investments

Investments	6 Months Ended
	Jun. 30, 2023
Investments, Debt and Equity Securities [Abstract]
Investments	Investments All of our available-for-sale debt investments as of June 30, 2023 are available to fund current operations and are recorded at fair value (Note 14). The following table summarizes our cash equivalents and available-for-sale debt investments: June 30, 2023 Fair Value Level Amortized Cost Gross Unrealized Gains Gross Unrealized Losses (1) Total Fair Value Level 1 Level 2 (In thousands) Cash equivalents Asset-backed securities $ 1,078 $ — $ (2) $ 1,076 $ — $ 1,076 Commercial paper 60,862 1 — 60,863 — 60,863 Corporate bonds 2,271 — — 2,271 — 2,271 Money market funds 89,493 — — 89,493 89,493 — Municipal bonds 403 — — 403 — 403 U.S. government bonds 4,972 1 — 4,973 4,973 — Variable rate demand notes 2,079 — — 2,079 — 2,079 Total cash equivalents (2) 161,158 2 (2) 161,158 94,466 66,692 Short-term investments Asset-backed securities 42,911 4 (132) 42,783 — 42,783 Certificate of deposits 15,638 — — 15,638 15,638 — Commercial paper 37,594 — — 37,594 — 37,594 Corporate bonds 239,320 137 (1,289) 238,168 — 238,168 Foreign government bonds 2,379 1 — 2,380 — 2,380 Municipal bonds 366 — — 366 — 366 U.S. government agency bonds 13,179 — (52) 13,127 — 13,127 U.S. government bonds 42,536 — (228) 42,308 42,308 — Variable rate demand notes 1,767 — — 1,767 — 1,767 Total short-term investments 395,690 142 (1,701) 394,131 57,946 336,185 Total $ 556,848 $ 144 $ (1,703) $ 555,289 $ 152,412 $ 402,877 December 31, 2022 Fair Value Level Amortized Cost Gross Unrealized Gains Gross Unrealized Losses (1) Total Fair Value Level 1 Level 2 (In thousands) Cash equivalents Asset-backed securities $ 25 $ — $ — $ 25 $ — $ 25 Commercial paper 69,101 — — 69,101 — 69,101 Money market funds 97,650 — — 97,650 97,650 — Municipal bonds 1,001 — — 1,001 — 1,001 U.S. government agency bonds 16,982 3 — 16,985 — 16,985 U.S. government bonds 10,767 1 — 10,768 10,768 — Total cash equivalents 195,526 4 — 195,530 108,418 87,112 Short-term investments Asset-backed securities 25,677 7 (134) 25,550 — 25,550 Certificate of deposits 17,362 — — 17,362 17,362 — Commercial paper 27,866 — — 27,866 — 27,866 Corporate bonds 198,868 7 (1,529) 197,346 — 197,346 Foreign government bonds 996 — (4) 992 — 992 Mortgage-backed securities 696 — (2) 694 — 694 Municipal bonds 364 — (2) 362 — 362 U.S. government agency bonds 735 — (1) 734 — 734 U.S. government bonds 6,704 1 (20) 6,685 6,685 — Total short-term investments 279,268 15 (1,692) 277,591 24,047 253,544 Total $ 474,794 $ 19 $ (1,692) $ 473,121 $ 132,465 $ 340,656 (1) All unrealized losses have been in a continuous loss position for less than 12 months. We do not intend to sell the investments in an unrealized loss position, and it is not more likely than not that we will be required to sell these investments before recovery of their amortized cost bases. (2) For six months ended June 30, 2023 and 2022, we sold cash equivalent investments for proceeds of $40.1 million and $19.0 million, respectively, and realized no gain or loss on such sales. The following table summarizes the contractual maturities of our cash equivalents and available-for-sale debt investments as of June 30, 2023 : Amortized Cost Fair Value (In thousands) Within 1 year $ 416,247 $ 415,444 After 1 year through 5 years 131,411 130,672 After 5 years through 10 years 4,941 4,924 After 10 years 4,249 4,249 Total $ 556,848 $ 555,289 Actual maturities can differ from contractual maturities due to various factors including the issuers may have the right to call or prepay obligations without call or prepayment penalties.

Factoring of Accounts Receivabl

Factoring of Accounts Receivable	6 Months Ended
	Jun. 30, 2023
Factoring of Accounts Receivable [Abstract]
Factoring of Accounts Receivable	Factoring of Accounts Receivable For certain accounts receivable, we use non-recourse factoring arrangements with third-party financial institutions to manage our working capital and cash flows. Under these arrangements, we sell receivables to a financial institution for cash at a discount to the face amount. As part of the factoring arrangements, we perform certain collection and administrative functions for the receivables sold. For the three and six months ended June 30, 2023, we sold receivables totaling $49.4 million and $127.4 million, net of discounts and fees of $0.1 million and $0.3 million, respectively. For the three and six months ended June 30, 2022, we sold receivables totaling $73.3 million and $165.5 million, net of discounts and fees of $0.2 million and $0.4 million, respectively.

Property, Plant and Equipment

Property, Plant and Equipment	6 Months Ended
	Jun. 30, 2023
Property, Plant and Equipment [Abstract]
Property, Plant And Equipment	Property, Plant and Equipment Property, plant and equipment consist of the following: June 30, 2023 December 31, 2022 (In thousands) Land $ 212,450 $ 214,763 Buildings and improvements 1,828,664 1,817,135 Machinery and equipment 6,862,988 6,757,652 Finance lease assets 190,836 165,122 Furniture, fixtures and other equipment 22,617 23,240 Software and computer equipment 243,811 240,610 Construction in progress 400,043 152,809 Total property, plant and equipment 9,761,409 9,371,331 Accumulated depreciation and amortization (6,451,817) (6,235,717) Total property, plant and equipment, net $ 3,309,592 $ 3,135,614 The following table summarizes our depreciation expense: For the Three Months Ended June 30, For the Six Months Ended June 30, 2023 2022 2023 2022 (In thousands) Depreciation expense $ 157,742 $ 150,999 $ 314,357 $ 299,038 As of June 30, 2023 and December 31, 2022, we had $256.3 million and $79.6 million of costs, including capitalized interest of $3.1 million and $0.7 million, respectively, in construction in progress for the Vietnam Facility.

Accrued Expenses

Accrued Expenses	6 Months Ended
	Jun. 30, 2023
Payables and Accruals [Abstract]
Accrued Expenses	Accrued Expenses Accrued expenses consist of the following: June 30, 2023 December 31, 2022 (In thousands) Payroll and benefits $ 102,355 $ 137,445 Deferred revenue and customer advances 75,890 81,459 Short-term finance lease liabilities 63,595 56,570 Income taxes payable 42,181 50,685 Accrued interest 11,050 10,878 Accrued severance plan obligations 6,989 7,422 Other accrued expenses 52,462 57,382 Total accrued expenses $ 354,522 $ 401,841

Debt

Debt	6 Months Ended
	Jun. 30, 2023
Debt Disclosure [Abstract]
Debt	Debt Following is a summary of short-term borrowings and long-term debt: June 30, 2023 December 31, 2022 (In thousands) Debt of Amkor Technology, Inc.: Senior notes: 6.625% Senior notes, due September 2027 $ 525,000 $ 525,000 Debt of subsidiaries: Amkor Technology Korea, Inc.: Term loan, fixed rate at 1.85%, due April 2024 (1) — — Term loan, fixed rate at 2.12%, due December 2028 200,000 200,000 Amkor Technology Japan, Inc.: Short-term term loans, variable rate (2) 3,451 4,042 Term loan, fixed rate at 1.30%, due July 2023 9,008 29,744 Term loan, fixed rate at 1.35%, due December 2024 59,247 86,943 Term loan, fixed rate at 1.20%, due December 2025 37,766 49,878 Term loan, fixed rate at 1.23%, due December 2026 63,544 79,927 Term loan, fixed rate at 1.59%, due December 2027 97,914 119,738 Amkor Assembly & Test (Shanghai) Co., Ltd.: Term loans, SOFR plus 0.75%, due March 2024 (3) 45,000 46,000 Term loans, SOFR plus 0.75% due June 2025 (3) 38,000 39,000 Term loans, SOFR plus 0.75%, due 2025 (3) 58,500 59,500 Other: Credit facility, TAIFX plus the applicable bank rate, due December 2024 (Taiwan) (4) — — Senior secured revolving credit facility, applicable bank rate plus 1.75%, due March 2027 (Singapore) (5) — — 1,137,430 1,239,772 Less: Unamortized discount and deferred debt costs, net (5,917) (7,438) Less: Short-term borrowings and current portion of long-term debt (155,978) (143,813) Long-term debt $ 975,535 $ 1,088,521 (1) In April 2021, we entered into a ₩80 billion term loan agreement with the option to borrow and re-borrow the funds up to six times per year through April 2024. Principal is payable at maturity, and interest is payable monthly, at a fixed rate of 1.85%. As of June 30, 2023, ₩80.0 billion, or approximately $61 million, was available to be drawn. (2) We entered into various short-term term loans which mature semiannually. Principal and interest are payable in monthly installments. Interest as of June 30, 2023 is at an annual base rate equal to the Tokyo Interbank Offered Rate plus 0.18% to 0.27% (weighted average of 0.26% as of June 30, 2023). As of June 30, 2023, $8.4 million was available to be drawn. (3) In June 2023, Amkor Assembly & Test Co. Ltd. amended all term loans to replace LIBOR with a Secured Overnight Financing Rate (SOFR) plus 0.75% annual base rate (weighted average of 5.80% as of June 30, 2023). This contractual amendment is treated as a modification with no recognized gain or loss. (4) In March 2022, Amkor Technology Taiwan Ltd. (“ATT”) amended an existing revolving credit facility to reduce availability from $36.0 million to $15.0 million. As of June 30, 2023, $15.0 million was available for future borrowings under such credit facility. (5) In March 2022, Amkor Technology Singapore Holdings Pte. Ltd. (“ATSH”) entered into a $600.0 million senior revolving credit facility (the “2022 Singapore Revolver”), which is guaranteed by Amkor Technology, Inc., ATT and Amkor Advanced Technology, Inc. (“AATT”). The maximum borrowing capacity under the 2022 Singapore Revolver is limited to a base amount equal to the lesser of: (1) $600.0 million; or (2) $250.0 million plus a variable amount equal to 37.5% of our consolidated accounts receivable balance. As of June 30, 2023, $600.0 million was available for future borrowings under the 2022 Singapore Revolver. Certain of our foreign debt is collateralized by the land, buildings, equipment and accounts receivable in the respective locations. As of June 30, 2023, the collateralized debt balance was $600.0 million, of which $349.2 million of assets were pledged as collateral. The debt of Amkor Technology, Inc. is structurally subordinated in right of payment to all existing and future debt and other liabilities of our subsidiaries. From time to time, Amkor Technology, Inc., ATT, AATT, and ATSH guarantee certain debt of our subsidiaries. The agreements governing our indebtedness contain affirmative and negative covenants which restrict our ability to pay dividends and could restrict our operations. These restrictions are determined in part by calculations based upon cumulative net income and do not currently have a material impact on our ability to make dividend payments or stock repurchases. We were in compliance with all debt covenants at June 30, 2023.

Pension Plans

Pension Plans	6 Months Ended
	Jun. 30, 2023
Retirement Benefits [Abstract]
Pension Plans	Pension Plans Foreign Defined Benefit Pension Plans Our subsidiaries in Japan, Korea, Malaysia, the Philippines and Taiwan sponsor defined benefit pension plans. Charges to expense are based upon actuarial analyses. The components of net periodic pension cost for these defined benefit pension plans are as follows: For the Three Months Ended June 30, For the Six Months Ended June 30, 2023 2022 2023 2022 (In thousands) Service cost $ 3,697 $ 5,088 $ 7,525 $ 10,506 Interest cost 1,558 1,204 3,161 2,462 Expected return on plan assets (1,278) (1,428) (2,589) (2,921) Recognized actuarial loss (105) 13 (203) 26 Net periodic pension cost $ 3,872 $ 4,877 $ 7,894 $ 10,073 The components of net periodic pension cost other than the service cost component are included in other (income) expense, net in our Consolidated Statements of Income. Defined Contribution Pension Plans We sponsor defined contribution pension plans in Korea, Malaysia, Taiwan and the U.S. The following table summarizes our defined contribution expense: For the Three Months Ended June 30, For the Six Months Ended June 30, 2023 2022 2023 2022 (In thousands) Defined contribution expense $ 6,253 $ 5,554 $ 15,049 $ 13,503

Derivatives

Derivatives	6 Months Ended
	Jun. 30, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives	Derivatives We use foreign currency forward contracts to mitigate foreign currency risk of certain monetary assets and liabilities denominated in foreign currencies. We do not enter into such contracts for trading or speculative purposes. These derivative instruments are not designated as hedging instruments. As of June 30, 2023 and December 31, 2022, our foreign exchange forward contracts consisted of the following: June 30, 2023 December 31, 2022 Notional Value Fair Value (Level 2) Balance Sheet Location Notional Value Fair Value (Level 2) Balance Sheet Location (In thousands) Japanese yen $ 206,666 $ (753) Accrued expenses $ 330,179 $ 6,284 Other current assets Korean won 94,259 69 Other current assets 65,927 333 Other current assets Philippine peso 3,655 3 Other current assets 3,085 (6) Accrued expenses Singapore dollar 27,479 6 Other current assets — — N/A Taiwan dollar 21,870 (50) Accrued expenses 28,763 (57) Accrued expenses Total forward contracts $ 353,929 $ (725) $ 427,954 $ 6,554 For the three and six months ended June 30, 2023, the derivatives resulted in a net loss of $26.4 million and $38.4 million, respectively, which were offset by the foreign currency gains associated with the underlying net liabilities. For the three and six months ended June 30, 2022, the derivatives resulted in a net loss of $42.8 million and $65.1 million, respectively, which were offset by the foreign currency gains associated with the underlying net liabilities.

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2023
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements The accounting framework for determining fair value includes a hierarchy for ranking the quality and reliability of the information used to measure fair value, which enables the reader of the financial statements to assess the inputs used to develop those measurements. The fair value hierarchy consists of three tiers as follows: Level 1, defined as quoted market prices in active markets for identical assets or liabilities; Level 2, defined as inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active, model-based valuation techniques for which all significant assumptions are observable in the market or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities; and Level 3, defined as unobservable inputs that are not corroborated by market data. For our Level 2 short-term investments, we consider factors such as actual trade data, benchmark yields, broker/dealer quotes, and other similar data obtained from quoted market prices and independent pricing vendors to determine the fair value of these assets and liabilities. The fair values of cash, accounts receivable, trade accounts payable, capital expenditures payable and certain other current assets and accrued expenses approximate carrying values because of their short-term nature. The carrying value of certain other non-current assets and liabilities approximates fair value. Our assets and liabilities recorded at fair value on a recurring basis include restricted cash money market funds and short-term investments, including investments classified as cash equivalents. Cash equivalent money market funds and restricted cash money market funds are invested in U.S. money market funds and various U.S. and foreign bank operating and time deposit accounts, which are due on demand or carry a maturity date of less than three months when purchased. No restrictions have been imposed on us regarding withdrawal of balances with respect to our cash equivalents as a result of liquidity or other credit market issues affecting the money market funds we invest in or the counterparty financial institutions holding our deposits. Our derivative financial instruments are valued using quoted market prices for similar assets. Counterparties to these derivative contracts are highly rated financial institutions. We also measure certain assets and liabilities, including property, plant and equipment and goodwill, at fair value on a nonrecurring basis. We measure the fair value of our debt for disclosure purposes. The following table presents the fair value of our debt: June 30, 2023 December 31, 2022 Fair Value Carrying Value Fair Value Carrying Value (In thousands) Senior notes (Level 1) $ 526,596 $ 521,470 $ 523,016 $ 521,114 Revolving credit facilities and term loans (Level 2) 590,137 610,043 686,728 711,220 Total debt $ 1,116,733 $ 1,131,513 $ 1,209,744 $ 1,232,334 The estimated fair value of our senior notes is based primarily on quoted market prices reported on or near the respective balance sheet dates. The estimated fair value of our revolving credit facilities and term loans is calculated using a discounted cash flow analysis, which utilizes market-based assumptions, including forward interest rates adjusted for credit risk.

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2023
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies We generally warrant that our services will be performed in a professional and workmanlike manner and in compliance with our customers’ specifications. We accrue costs for known warranty issues. Historically, our warranty costs have been immaterial. Legal Proceedings We are involved in claims and legal proceedings and may become involved in other legal matters arising in the ordinary course of our business. We evaluate these claims and legal matters on a case-by-case basis to determine the impact, if any, on our business, liquidity, results of operations, financial condition or cash flows. Although the outcome of these matters is uncertain, we believe that the ultimate outcome of these claims and proceedings, individually and in the aggregate, will not have a material adverse impact to us. Our evaluation of the potential impact of these claims and legal proceedings on our business, liquidity, results of operations, financial condition or cash flows could change in the future. In accordance with the accounting guidance for loss contingencies, including legal proceedings, lawsuits, pending claims and other legal matters, we accrue for a loss contingency when we conclude that the likelihood of a loss is probable and the amount of the loss can be reasonably estimated. We adjust our accruals from time to time as we receive additional information, but the loss we incur may be significantly greater than or less than the amount we have accrued. We disclose loss contingencies if we believe they are material and there is at least a reasonable possibility that a loss has been incurred. Attorney fees related to legal matters are expensed as incurred. Lease Commitments As of June 30, 2023 we have entered into additional lease agreements that have not yet commenced of approximately $9 million.

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Pay vs Performance Disclosure
Net Income (Loss) Attributable to Parent	$ 64,286	$ 124,778	$ 109,637	$ 295,441

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
	Jun. 30, 2023
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Interim Financial Statements (P

Interim Financial Statements (Policies)	6 Months Ended
	Jun. 30, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation. The Consolidated Financial Statements and related disclosures as of June 30, 2023, and for the three and six months ended June 30, 2023 and 2022, contained in this Form 10-Q (the “Consolidated Financial Statements”) are unaudited pursuant to the rules and regulations of the SEC. The December 31, 2022 Consolidated Balance Sheet data contained in this Form 10-Q was derived from audited financial statements but does not include all disclosures required by accounting principles generally accepted in the United States of America (“U.S. GAAP”). Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to SEC rules and regulations. In our opinion, the Consolidated Financial Statements include all adjustments (consisting only of normal recurring adjustments) necessary for the fair statement of the results for the interim periods and should be read in conjunction with the financial statements included in the 2022 Form 10-K. The results of operations for the three and six months ended June 30, 2023 are not necessarily indicative of the results to be expected for the full year ending December 31, 2023. Unless the context otherwise requires, all references to “Amkor,” “we,” “us” or “our” are to Amkor Technology, Inc. and its wholly and majority-owned subsidiaries.
Use of Estimates	Use of Estimates. The Consolidated Financial Statements have been prepared in conformity with U.S. GAAP, using management’s best estimates and judgments where appropriate. These estimates and judgments affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements. The estimates and judgments will also affect the reported amounts for certain revenues and expenses during the reporting period. Actual results could differ materially from these estimates and judgments as a result of, for example, any worsening of the global business and economic environment.
Goodwill	Goodwill. The balance of goodwill in the Consolidated Balance Sheets contained in this Form 10-Q reflects adjustments for foreign currency translation.
Income Taxes	We monitor on an ongoing basis our ability to utilize our deferred tax assets and whether there is a need for a related valuation allowance. In evaluating our ability to recover our deferred tax assets in the jurisdictions from which they arise, we consider all available positive and negative evidence, including scheduled reversals of deferred tax liabilities, projected future taxable income, tax-planning strategies and recent results of operations. We maintain a valuation allowance on certain U.S. and foreign deferred tax assets. Such valuation allowances are released as the related tax benefits are realized or when sufficient evidence exists to conclude that it is more likely than not that the deferred tax assets will be realized.
Commitments and Contingencies	In accordance with the accounting guidance for loss contingencies, including legal proceedings, lawsuits, pending claims and other legal matters, we accrue for a loss contingency when we conclude that the likelihood of a loss is probable and the amount of the loss can be reasonably estimated. We adjust our accruals from time to time as we receive additional information, but the loss we incur may be significantly greater than or less than the amount we have accrued. We disclose loss contingencies if we believe they are material and there is at least a reasonable possibility that a loss has been incurred. Attorney fees related to legal matters are expensed as incurred.

Net Sales by Product Group an_2

Net Sales by Product Group and End Market (Tables)	6 Months Ended
	Jun. 30, 2023
Revenue from Contract with Customer [Abstract]
Schedule of net sales by product group and end market	The following table presents our net sales by product group: For the Three Months Ended June 30, For the Six Months Ended June 30, 2023 2022 2023 2022 (In thousands) (In thousands) Advanced products (1) $ 1,084,361 $ 1,083,721 $ 2,151,738 $ 2,240,229 Mainstream products (2) 373,561 421,147 777,723 861,455 Total net sales $ 1,457,922 $ 1,504,868 $ 2,929,461 $ 3,101,684 (1) Advanced products include flip chip, memory and wafer-level processing and related test services. (2) Mainstream products include all other wirebond packaging and related test services. Net sales by end market consist of the following: For the Three Months Ended June 30, For the Six Months Ended June 30, 2023 2022 2023 2022 Communications (smartphones, tablets) 41 % 37 % 43 % 39 % Automotive, industrial and other (ADAS, electrification, infotainment, safety) 23 % 23 % 25 % 22 % Computing (data center, infrastructure, PC/laptop, storage) 20 % 18 % 18 % 18 % Consumer (AR & gaming, connected home, home electronics, wearables) 16 % 22 % 14 % 21 % Total net sales 100 % 100 % 100 % 100 %

Other Income and Expense (Table

Other Income and Expense (Tables)	6 Months Ended
	Jun. 30, 2023
Other Income and Expenses [Abstract]
Schedule of other (income) expense	Other income and expense consist of the following: For the Three Months Ended June 30, For the Six Months Ended June 30, 2023 2022 2023 2022 (In thousands) Interest income $ (12,019) $ (1,941) $ (22,452) $ (2,544) Foreign currency loss (gain), net 49 (6,254) 6,812 (10,555) Loss on debt retirement — 367 — 464 Other 87 (213) 205 (502) Total other (income) expense, net $ (11,883) $ (8,041) $ (15,435) $ (13,137)

Earnings Per Share (Tables)

Earnings Per Share (Tables)	6 Months Ended
	Jun. 30, 2023
Earnings Per Share [Abstract]
Schedule of computation of basic and diluted earnings per share	The following table summarizes the computation of basic and diluted EPS: For the Three Months Ended June 30, For the Six Months Ended June 30, 2023 2022 2023 2022 (In thousands, Net income attributable to Amkor common stockholders $ 64,286 $ 124,778 $ 109,637 $ 295,441 Weighted-average number of common shares outstanding - basic 245,637 244,592 245,485 244,498 Effect of dilutive securities: Share-based awards 1,327 1,263 1,561 1,440 Weighted-average number of common shares outstanding - diluted 246,964 245,855 247,046 245,938 Net income attributable to Amkor per common share: Basic $ 0.26 $ 0.51 $ 0.45 $ 1.21 Diluted 0.26 0.51 0.44 1.20
Schedule of potential shares of common stock excluded from diluted earnings per share	The following table summarizes the potential shares of common stock that were excluded from diluted EPS because the effect of including these potential shares was anti-dilutive: For the Three Months Ended June 30, For the Six Months Ended June 30, 2023 2022 2023 2022 (In thousands) Share-based awards — 367 — 290

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) (Tables)	6 Months Ended
	Jun. 30, 2023
Equity [Abstract]
Schedule of changes in accumulated other comprehensive income (loss), net of tax	Changes in accumulated other comprehensive income (loss), net of tax, consist of the following: Unrealized Gains (Losses) on Available-for-Sale Debt Investments (1) Defined Benefit Pension (2) Foreign Currency Translation Total (In thousands) Accumulated other comprehensive income (loss) at December 31, 2022 $ (1,573) $ 14,220 $ 4,052 $ 16,699 Other comprehensive income (loss) before reclassifications 176 — (15,164) (14,988) Amounts reclassified from accumulated other comprehensive income (loss) (84) (195) — (279) Other comprehensive income (loss) 92 (195) (15,164) (15,267) Accumulated other comprehensive income (loss) at June 30, 2023 $ (1,481) $ 14,025 $ (11,112) $ 1,432 Unrealized Gains (Losses) on Available-for-Sale Debt Investments (1) Defined Benefit Pension (2) Foreign Currency Translation Total (In thousands) Accumulated other comprehensive income (loss) at December 31, 2021 $ (348) $ 5,616 $ 14,710 $ 19,978 Other comprehensive income (loss) before reclassifications (1,719) — (24,027) (25,746) Amounts reclassified from accumulated other comprehensive income (loss) 12 9 — 21 Other comprehensive income (loss) (1,707) 9 (24,027) (25,725) Accumulated other comprehensive income (loss) at June 30, 2022 $ (2,055) $ 5,625 $ (9,317) $ (5,747) (1) Amounts reclassified out of accumulated other comprehensive income (loss) are included as other (income) expense, net (Note 3). (2) Amounts reclassified out of accumulated other comprehensive income (loss) are included as a component of net periodic pension cost (Note 12) or other (income) expense, net (Note 3).

Investments (Tables)

Investments (Tables)	6 Months Ended
	Jun. 30, 2023
Investments, Debt and Equity Securities [Abstract]
Schedule of debt securities available-for-sale	The following table summarizes our cash equivalents and available-for-sale debt investments: June 30, 2023 Fair Value Level Amortized Cost Gross Unrealized Gains Gross Unrealized Losses (1) Total Fair Value Level 1 Level 2 (In thousands) Cash equivalents Asset-backed securities $ 1,078 $ — $ (2) $ 1,076 $ — $ 1,076 Commercial paper 60,862 1 — 60,863 — 60,863 Corporate bonds 2,271 — — 2,271 — 2,271 Money market funds 89,493 — — 89,493 89,493 — Municipal bonds 403 — — 403 — 403 U.S. government bonds 4,972 1 — 4,973 4,973 — Variable rate demand notes 2,079 — — 2,079 — 2,079 Total cash equivalents (2) 161,158 2 (2) 161,158 94,466 66,692 Short-term investments Asset-backed securities 42,911 4 (132) 42,783 — 42,783 Certificate of deposits 15,638 — — 15,638 15,638 — Commercial paper 37,594 — — 37,594 — 37,594 Corporate bonds 239,320 137 (1,289) 238,168 — 238,168 Foreign government bonds 2,379 1 — 2,380 — 2,380 Municipal bonds 366 — — 366 — 366 U.S. government agency bonds 13,179 — (52) 13,127 — 13,127 U.S. government bonds 42,536 — (228) 42,308 42,308 — Variable rate demand notes 1,767 — — 1,767 — 1,767 Total short-term investments 395,690 142 (1,701) 394,131 57,946 336,185 Total $ 556,848 $ 144 $ (1,703) $ 555,289 $ 152,412 $ 402,877 December 31, 2022 Fair Value Level Amortized Cost Gross Unrealized Gains Gross Unrealized Losses (1) Total Fair Value Level 1 Level 2 (In thousands) Cash equivalents Asset-backed securities $ 25 $ — $ — $ 25 $ — $ 25 Commercial paper 69,101 — — 69,101 — 69,101 Money market funds 97,650 — — 97,650 97,650 — Municipal bonds 1,001 — — 1,001 — 1,001 U.S. government agency bonds 16,982 3 — 16,985 — 16,985 U.S. government bonds 10,767 1 — 10,768 10,768 — Total cash equivalents 195,526 4 — 195,530 108,418 87,112 Short-term investments Asset-backed securities 25,677 7 (134) 25,550 — 25,550 Certificate of deposits 17,362 — — 17,362 17,362 — Commercial paper 27,866 — — 27,866 — 27,866 Corporate bonds 198,868 7 (1,529) 197,346 — 197,346 Foreign government bonds 996 — (4) 992 — 992 Mortgage-backed securities 696 — (2) 694 — 694 Municipal bonds 364 — (2) 362 — 362 U.S. government agency bonds 735 — (1) 734 — 734 U.S. government bonds 6,704 1 (20) 6,685 6,685 — Total short-term investments 279,268 15 (1,692) 277,591 24,047 253,544 Total $ 474,794 $ 19 $ (1,692) $ 473,121 $ 132,465 $ 340,656 (1) All unrealized losses have been in a continuous loss position for less than 12 months. We do not intend to sell the investments in an unrealized loss position, and it is not more likely than not that we will be required to sell these investments before recovery of their amortized cost bases. (2) For six months ended June 30, 2023 and 2022, we sold cash equivalent investments for proceeds of $40.1 million and $19.0 million, respectively, and realized no gain or loss on such sales. The following table summarizes the contractual maturities of our cash equivalents and available-for-sale debt investments as of June 30, 2023 : Amortized Cost Fair Value (In thousands) Within 1 year $ 416,247 $ 415,444 After 1 year through 5 years 131,411 130,672 After 5 years through 10 years 4,941 4,924 After 10 years 4,249 4,249 Total $ 556,848 $ 555,289

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	6 Months Ended
	Jun. 30, 2023
Property, Plant and Equipment [Abstract]
Schedule of property, plant and equipment and depreciation expense	Property, plant and equipment consist of the following: June 30, 2023 December 31, 2022 (In thousands) Land $ 212,450 $ 214,763 Buildings and improvements 1,828,664 1,817,135 Machinery and equipment 6,862,988 6,757,652 Finance lease assets 190,836 165,122 Furniture, fixtures and other equipment 22,617 23,240 Software and computer equipment 243,811 240,610 Construction in progress 400,043 152,809 Total property, plant and equipment 9,761,409 9,371,331 Accumulated depreciation and amortization (6,451,817) (6,235,717) Total property, plant and equipment, net $ 3,309,592 $ 3,135,614 The following table summarizes our depreciation expense: For the Three Months Ended June 30, For the Six Months Ended June 30, 2023 2022 2023 2022 (In thousands) Depreciation expense $ 157,742 $ 150,999 $ 314,357 $ 299,038

Accrued Expenses (Tables)

Accrued Expenses (Tables)	6 Months Ended
	Jun. 30, 2023
Payables and Accruals [Abstract]
Schedule of accrued expenses	Accrued expenses consist of the following: June 30, 2023 December 31, 2022 (In thousands) Payroll and benefits $ 102,355 $ 137,445 Deferred revenue and customer advances 75,890 81,459 Short-term finance lease liabilities 63,595 56,570 Income taxes payable 42,181 50,685 Accrued interest 11,050 10,878 Accrued severance plan obligations 6,989 7,422 Other accrued expenses 52,462 57,382 Total accrued expenses $ 354,522 $ 401,841

Debt (Tables)

Debt (Tables)	6 Months Ended
	Jun. 30, 2023
Debt Disclosure [Abstract]
Schedule of short-term borrowings and long-term debt	Following is a summary of short-term borrowings and long-term debt: June 30, 2023 December 31, 2022 (In thousands) Debt of Amkor Technology, Inc.: Senior notes: 6.625% Senior notes, due September 2027 $ 525,000 $ 525,000 Debt of subsidiaries: Amkor Technology Korea, Inc.: Term loan, fixed rate at 1.85%, due April 2024 (1) — — Term loan, fixed rate at 2.12%, due December 2028 200,000 200,000 Amkor Technology Japan, Inc.: Short-term term loans, variable rate (2) 3,451 4,042 Term loan, fixed rate at 1.30%, due July 2023 9,008 29,744 Term loan, fixed rate at 1.35%, due December 2024 59,247 86,943 Term loan, fixed rate at 1.20%, due December 2025 37,766 49,878 Term loan, fixed rate at 1.23%, due December 2026 63,544 79,927 Term loan, fixed rate at 1.59%, due December 2027 97,914 119,738 Amkor Assembly & Test (Shanghai) Co., Ltd.: Term loans, SOFR plus 0.75%, due March 2024 (3) 45,000 46,000 Term loans, SOFR plus 0.75% due June 2025 (3) 38,000 39,000 Term loans, SOFR plus 0.75%, due 2025 (3) 58,500 59,500 Other: Credit facility, TAIFX plus the applicable bank rate, due December 2024 (Taiwan) (4) — — Senior secured revolving credit facility, applicable bank rate plus 1.75%, due March 2027 (Singapore) (5) — — 1,137,430 1,239,772 Less: Unamortized discount and deferred debt costs, net (5,917) (7,438) Less: Short-term borrowings and current portion of long-term debt (155,978) (143,813) Long-term debt $ 975,535 $ 1,088,521 (1) In April 2021, we entered into a ₩80 billion term loan agreement with the option to borrow and re-borrow the funds up to six times per year through April 2024. Principal is payable at maturity, and interest is payable monthly, at a fixed rate of 1.85%. As of June 30, 2023, ₩80.0 billion, or approximately $61 million, was available to be drawn. (2) We entered into various short-term term loans which mature semiannually. Principal and interest are payable in monthly installments. Interest as of June 30, 2023 is at an annual base rate equal to the Tokyo Interbank Offered Rate plus 0.18% to 0.27% (weighted average of 0.26% as of June 30, 2023). As of June 30, 2023, $8.4 million was available to be drawn. (3) In June 2023, Amkor Assembly & Test Co. Ltd. amended all term loans to replace LIBOR with a Secured Overnight Financing Rate (SOFR) plus 0.75% annual base rate (weighted average of 5.80% as of June 30, 2023). This contractual amendment is treated as a modification with no recognized gain or loss. (4) In March 2022, Amkor Technology Taiwan Ltd. (“ATT”) amended an existing revolving credit facility to reduce availability from $36.0 million to $15.0 million. As of June 30, 2023, $15.0 million was available for future borrowings under such credit facility.

Pension Plans (Tables)

Pension Plans (Tables)	6 Months Ended
	Jun. 30, 2023
Retirement Benefits [Abstract]
Schedule of components of net periodic pension cost	The components of net periodic pension cost for these defined benefit pension plans are as follows: For the Three Months Ended June 30, For the Six Months Ended June 30, 2023 2022 2023 2022 (In thousands) Service cost $ 3,697 $ 5,088 $ 7,525 $ 10,506 Interest cost 1,558 1,204 3,161 2,462 Expected return on plan assets (1,278) (1,428) (2,589) (2,921) Recognized actuarial loss (105) 13 (203) 26 Net periodic pension cost $ 3,872 $ 4,877 $ 7,894 $ 10,073
Schedule of defined contribution expense	The following table summarizes our defined contribution expense: For the Three Months Ended June 30, For the Six Months Ended June 30, 2023 2022 2023 2022 (In thousands) Defined contribution expense $ 6,253 $ 5,554 $ 15,049 $ 13,503

Derivatives (Tables)

Derivatives (Tables)	6 Months Ended
	Jun. 30, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of air value of derivative instruments in statement of financial position	As of June 30, 2023 and December 31, 2022, our foreign exchange forward contracts consisted of the following: June 30, 2023 December 31, 2022 Notional Value Fair Value (Level 2) Balance Sheet Location Notional Value Fair Value (Level 2) Balance Sheet Location (In thousands) Japanese yen $ 206,666 $ (753) Accrued expenses $ 330,179 $ 6,284 Other current assets Korean won 94,259 69 Other current assets 65,927 333 Other current assets Philippine peso 3,655 3 Other current assets 3,085 (6) Accrued expenses Singapore dollar 27,479 6 Other current assets — — N/A Taiwan dollar 21,870 (50) Accrued expenses 28,763 (57) Accrued expenses Total forward contracts $ 353,929 $ (725) $ 427,954 $ 6,554

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2023
Fair Value Disclosures [Abstract]
Schedule of fair value of financial instruments that are not recorded at fair value on recurring basis	The following table presents the fair value of our debt: June 30, 2023 December 31, 2022 Fair Value Carrying Value Fair Value Carrying Value (In thousands) Senior notes (Level 1) $ 526,596 $ 521,470 $ 523,016 $ 521,114 Revolving credit facilities and term loans (Level 2) 590,137 610,043 686,728 711,220 Total debt $ 1,116,733 $ 1,131,513 $ 1,209,744 $ 1,232,334

Interim Financial Statements (D

Interim Financial Statements (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Unbilled receivables	$ 268,300		$ 301,700
Contract liabilities	150,500		170,600
Deferred revenue and customer advances	75,890		$ 81,459
Revenue recognized	$ 39,200	$ 55,700
Minimum
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue expected timing of satisfaction, period	1 year
Maximum
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue expected timing of satisfaction, period	5 years

Net Sales by Product Group an_3

Net Sales by Product Group and End Market - Product Group (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disaggregation of Revenue [Line Items]
Total net sales	$ 1,457,922	$ 1,504,868	$ 2,929,461	$ 3,101,684
Advanced products
Disaggregation of Revenue [Line Items]
Total net sales	1,084,361	1,083,721	2,151,738	2,240,229
Mainstream products
Disaggregation of Revenue [Line Items]
Total net sales	$ 373,561	$ 421,147	$ 777,723	$ 861,455

Net Sales by Product Group an_4

Net Sales by Product Group and End Market - End Market (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	100%	100%	100%	100%
Net sales | Distribution Channel Concentration Risk | Communications (smartphones, tablets)
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	41%	37%	43%	39%
Net sales | Distribution Channel Concentration Risk | Automotive, industrial and other (ADAS, electrification, infotainment, safety)
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	23%	23%	25%	22%
Net sales | Distribution Channel Concentration Risk | Computing (data center, infrastructure, PC/laptop, storage)
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	20%	18%	18%	18%
Net sales | Distribution Channel Concentration Risk | Consumer (AR & gaming, connected home, home electronics, wearables)
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	16%	22%	14%	21%

Other Income and Expense (Detai

Other Income and Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Other Income and Expenses [Abstract]
Interest income	$ (12,019)	$ (1,941)	$ (22,452)	$ (2,544)
Foreign currency loss (gain), net	49	(6,254)	6,812	(10,555)
Loss on debt retirement	0	367	0	464
Other	87	(213)	205	(502)
Total other (income) expense, net	$ (11,883)	$ (8,041)	$ (15,435)	$ (13,137)

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Income tax expense	$ 9,407	$ 10,788	$ 20,271	$ 40,516
Gross unrecognized tax benefits	$ 31,000		$ 31,000		$ 33,300

Earnings Per Share - Calculatio

Earnings Per Share - Calculation of EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Earnings Per Share [Abstract]
Net income attributable to Amkor common stockholders, basic	$ 64,286	$ 124,778	$ 109,637	$ 295,441
Net income attributable to Amkor common stockholders, diluted	$ 64,286	$ 124,778	$ 109,637	$ 295,441
Weighted-average number of common shares outstanding - basic (in shares)	245,637	244,592	245,485	244,498
Effect of dilutive securities:
Share-based awards (in shares)	1,327	1,263	1,561	1,440
Weighted-average number of common shares outstanding - diluted (in shares)	246,964	245,855	247,046	245,938
Net income attributable to Amkor per common share:
Basic (in dollars per share)	$ 0.26	$ 0.51	$ 0.45	$ 1.21
Diluted (in dollars per share)	$ 0.26	$ 0.51	$ 0.44	$ 1.20

Earnings Per Share - Narrative

Earnings Per Share - Narrative (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Earnings Per Share [Abstract]
Share-based awards (in shares)	0	367	0	290

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	$ 3,727,163	$ 3,126,822	$ 3,699,701	$ 2,972,546
Other comprehensive income (loss) before reclassifications			(14,988)	(25,746)
Amounts reclassified from accumulated other comprehensive income (loss)			(279)	21
Total other comprehensive income (loss)	(13,658)	(16,243)	(15,267)	(25,725)
Balance at end of period	3,762,859	3,227,550	3,762,859	3,227,550
Unrealized Gains (Losses) on Available-for-Sale Debt Investments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period			(1,573)	(348)
Other comprehensive income (loss) before reclassifications			176	(1,719)
Amounts reclassified from accumulated other comprehensive income (loss)			(84)	12
Total other comprehensive income (loss)			92	(1,707)
Balance at end of period	(1,481)	(2,055)	(1,481)	(2,055)
Defined Benefit Pension
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period			14,220	5,616
Other comprehensive income (loss) before reclassifications			0	0
Amounts reclassified from accumulated other comprehensive income (loss)			(195)	9
Total other comprehensive income (loss)			(195)	9
Balance at end of period	14,025	5,625	14,025	5,625
Foreign Currency Translation
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period			4,052	14,710
Other comprehensive income (loss) before reclassifications			(15,164)	(24,027)
Amounts reclassified from accumulated other comprehensive income (loss)			0	0
Total other comprehensive income (loss)			(15,164)	(24,027)
Balance at end of period	(11,112)	(9,317)	(11,112)	(9,317)
Accumulated Other Comprehensive Income (Loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	15,090	10,496	16,699	19,978
Total other comprehensive income (loss)	(13,658)	(16,243)	(15,267)	(25,725)
Balance at end of period	$ 1,432	$ (5,747)	$ 1,432	$ (5,747)

Investments - Schedule of Cash

Investments - Schedule of Cash Equivalents, and Short term Investments (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Short-term investments, amortized cost	$ 556,848
Short-term investments, fair value	555,289
Total, amortized cost	556,848		$ 474,794
Total, gross unrealized gains	144		19
Total, gross unrealized losses	(1,703)		(1,692)
Total, fair value	555,289		473,121
Proceeds from sale of cash equivalent investments	40,100	$ 19,000
Short-term Investments
Debt Securities, Available-for-sale [Line Items]
Short-term investments, amortized cost	395,690		279,268
Short-term investments, gross unrealized gains	142		15
Short-term investments, gross unrealized losses	(1,701)		(1,692)
Short-term investments, fair value	394,131		277,591
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Short-term investments, amortized cost	42,911		25,677
Short-term investments, gross unrealized gains	4		7
Short-term investments, gross unrealized losses	(132)		(134)
Short-term investments, fair value	42,783		25,550
Certificate of deposits
Debt Securities, Available-for-sale [Line Items]
Short-term investments, amortized cost	15,638		17,362
Short-term investments, gross unrealized gains	0		0
Short-term investments, gross unrealized losses	0		0
Short-term investments, fair value	15,638		17,362
Commercial paper
Debt Securities, Available-for-sale [Line Items]
Short-term investments, amortized cost	37,594		27,866
Short-term investments, gross unrealized gains	0		0
Short-term investments, gross unrealized losses	0		0
Short-term investments, fair value	37,594		27,866
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Short-term investments, amortized cost	239,320		198,868
Short-term investments, gross unrealized gains	137		7
Short-term investments, gross unrealized losses	(1,289)		(1,529)
Short-term investments, fair value	238,168		197,346
Foreign government bonds
Debt Securities, Available-for-sale [Line Items]
Short-term investments, amortized cost	2,379		996
Short-term investments, gross unrealized gains	1		0
Short-term investments, gross unrealized losses	0		(4)
Short-term investments, fair value	2,380		992
Mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Short-term investments, amortized cost			696
Short-term investments, gross unrealized gains			0
Short-term investments, gross unrealized losses			(2)
Short-term investments, fair value			694
Municipal bonds
Debt Securities, Available-for-sale [Line Items]
Short-term investments, amortized cost	366		364
Short-term investments, gross unrealized gains	0		0
Short-term investments, gross unrealized losses	0		(2)
Short-term investments, fair value	366		362
U.S. government agency bonds
Debt Securities, Available-for-sale [Line Items]
Short-term investments, amortized cost	13,179		735
Short-term investments, gross unrealized gains	0		0
Short-term investments, gross unrealized losses	(52)		(1)
Short-term investments, fair value	13,127		734
U.S. government bonds
Debt Securities, Available-for-sale [Line Items]
Short-term investments, amortized cost	42,536		6,704
Short-term investments, gross unrealized gains	0		1
Short-term investments, gross unrealized losses	(228)		(20)
Short-term investments, fair value	42,308		6,685
Variable rate demand notes
Debt Securities, Available-for-sale [Line Items]
Short-term investments, amortized cost	1,767
Short-term investments, gross unrealized gains	0
Short-term investments, gross unrealized losses	0
Short-term investments, fair value	1,767
Cash equivalents
Debt Securities, Available-for-sale [Line Items]
Cash equivalents, amortized cost	161,158		195,526
Cash equivalents, gross unrealized gains	2		4
Cash equivalents, gross unrealized losses	(2)		0
Cash equivalent, fair value	161,158		195,530
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Cash equivalents, amortized cost	1,078		25
Cash equivalents, gross unrealized gains	0		0
Cash equivalents, gross unrealized losses	(2)		0
Cash equivalent, fair value	1,076		25
Commercial paper
Debt Securities, Available-for-sale [Line Items]
Cash equivalents, amortized cost	60,862		69,101
Cash equivalents, gross unrealized gains	1		0
Cash equivalents, gross unrealized losses	0		0
Cash equivalent, fair value	60,863		69,101
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Cash equivalents, amortized cost	2,271
Cash equivalents, gross unrealized gains	0
Cash equivalents, gross unrealized losses	0
Cash equivalent, fair value	2,271
Money market funds
Debt Securities, Available-for-sale [Line Items]
Cash equivalents, amortized cost	89,493		97,650
Cash equivalents, gross unrealized gains	0		0
Cash equivalents, gross unrealized losses	0		0
Cash equivalent, fair value	89,493		97,650
Municipal bonds
Debt Securities, Available-for-sale [Line Items]
Cash equivalents, amortized cost	403		1,001
Cash equivalents, gross unrealized gains	0		0
Cash equivalents, gross unrealized losses	0		0
Cash equivalent, fair value	403		1,001
U.S. government agency bonds
Debt Securities, Available-for-sale [Line Items]
Cash equivalents, amortized cost			16,982
Cash equivalents, gross unrealized gains			3
Cash equivalents, gross unrealized losses			0
Cash equivalent, fair value			16,985
U.S. government bonds
Debt Securities, Available-for-sale [Line Items]
Cash equivalents, amortized cost	4,972		10,767
Cash equivalents, gross unrealized gains	1		1
Cash equivalents, gross unrealized losses	0		0
Cash equivalent, fair value	4,973		10,768
Variable rate demand notes
Debt Securities, Available-for-sale [Line Items]
Cash equivalents, amortized cost	2,079
Cash equivalents, gross unrealized gains	0
Cash equivalents, gross unrealized losses	0
Cash equivalent, fair value	2,079
Level 1
Debt Securities, Available-for-sale [Line Items]
Total, fair value	152,412		132,465
Level 1 | Short-term Investments
Debt Securities, Available-for-sale [Line Items]
Short-term investments, fair value	57,946		24,047
Level 1 | Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Short-term investments, fair value	0		0
Level 1 | Certificate of deposits
Debt Securities, Available-for-sale [Line Items]
Short-term investments, fair value	15,638		17,362
Level 1 | Commercial paper
Debt Securities, Available-for-sale [Line Items]
Short-term investments, fair value	0		0
Level 1 | Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Short-term investments, fair value	0		0
Level 1 | Foreign government bonds
Debt Securities, Available-for-sale [Line Items]
Short-term investments, fair value	0		0
Level 1 | Mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Short-term investments, fair value			0
Level 1 | Municipal bonds
Debt Securities, Available-for-sale [Line Items]
Short-term investments, fair value	0		0
Level 1 | U.S. government agency bonds
Debt Securities, Available-for-sale [Line Items]
Short-term investments, fair value	0		0
Level 1 | U.S. government bonds
Debt Securities, Available-for-sale [Line Items]
Short-term investments, fair value	42,308		6,685
Level 1 | Variable rate demand notes
Debt Securities, Available-for-sale [Line Items]
Short-term investments, fair value	0
Level 1 | Cash equivalents
Debt Securities, Available-for-sale [Line Items]
Cash equivalent, fair value	94,466		108,418
Level 1 | Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Cash equivalent, fair value	0		0
Level 1 | Commercial paper
Debt Securities, Available-for-sale [Line Items]
Cash equivalent, fair value	0		0
Level 1 | Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Cash equivalent, fair value	0
Level 1 | Money market funds
Debt Securities, Available-for-sale [Line Items]
Cash equivalent, fair value	89,493		97,650
Level 1 | Municipal bonds
Debt Securities, Available-for-sale [Line Items]
Cash equivalent, fair value	0		0
Level 1 | U.S. government agency bonds
Debt Securities, Available-for-sale [Line Items]
Cash equivalent, fair value			0
Level 1 | U.S. government bonds
Debt Securities, Available-for-sale [Line Items]
Cash equivalent, fair value	4,973		10,768
Level 1 | Variable rate demand notes
Debt Securities, Available-for-sale [Line Items]
Cash equivalent, fair value	0
Level 2
Debt Securities, Available-for-sale [Line Items]
Total, fair value	402,877		340,656
Level 2 | Short-term Investments
Debt Securities, Available-for-sale [Line Items]
Short-term investments, fair value	336,185		253,544
Level 2 | Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Short-term investments, fair value	42,783		25,550
Level 2 | Certificate of deposits
Debt Securities, Available-for-sale [Line Items]
Short-term investments, fair value	0		0
Level 2 | Commercial paper
Debt Securities, Available-for-sale [Line Items]
Short-term investments, fair value	37,594		27,866
Level 2 | Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Short-term investments, fair value	238,168		197,346
Level 2 | Foreign government bonds
Debt Securities, Available-for-sale [Line Items]
Short-term investments, fair value	2,380		992
Level 2 | Mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Short-term investments, fair value			694
Level 2 | Municipal bonds
Debt Securities, Available-for-sale [Line Items]
Short-term investments, fair value	366		362
Level 2 | U.S. government agency bonds
Debt Securities, Available-for-sale [Line Items]
Short-term investments, fair value	13,127		734
Level 2 | U.S. government bonds
Debt Securities, Available-for-sale [Line Items]
Short-term investments, fair value	0		0
Level 2 | Variable rate demand notes
Debt Securities, Available-for-sale [Line Items]
Short-term investments, fair value	1,767
Level 2 | Cash equivalents
Debt Securities, Available-for-sale [Line Items]
Cash equivalent, fair value	66,692		87,112
Level 2 | Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Cash equivalent, fair value	1,076		25
Level 2 | Commercial paper
Debt Securities, Available-for-sale [Line Items]
Cash equivalent, fair value	60,863		69,101
Level 2 | Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Cash equivalent, fair value	2,271
Level 2 | Money market funds
Debt Securities, Available-for-sale [Line Items]
Cash equivalent, fair value	0		0
Level 2 | Municipal bonds
Debt Securities, Available-for-sale [Line Items]
Cash equivalent, fair value	403		1,001
Level 2 | U.S. government agency bonds
Debt Securities, Available-for-sale [Line Items]
Cash equivalent, fair value			16,985
Level 2 | U.S. government bonds
Debt Securities, Available-for-sale [Line Items]
Cash equivalent, fair value	0		$ 0
Level 2 | Variable rate demand notes
Debt Securities, Available-for-sale [Line Items]
Cash equivalent, fair value	$ 2,079

Investments - Contractual Matur

Investments - Contractual Maturities of Cash Equivalents And Available-for-Sale Debt Investments (Details) $ in Thousands	Jun. 30, 2023 USD ($)
Investments, Debt and Equity Securities [Abstract]
Within 1 year, Amortized Cost	$ 416,247
Within 1 year, Fair Value	415,444
After 1 year through 5 years, Amortized Cost	131,411
After 1 year through 5 years, Fair Value	130,672
After 5 years through 10 Years, Amortized Cost	4,941
After 5 years through 10 years, Fair Value	4,924
After 10 Years, Amortized Cost	4,249
After 10 Years, Fair Value	4,249
Short-term investments, amortized cost	556,848
Total, fair value	$ 555,289

Investments - Narrative (Detail

Investments - Narrative (Details) - Level 1 - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Debt and Equity Securities, FV-NI [Line Items]
Amortized cost of held-to-maturity securities	$ 5.1	$ 4.4
Fair market value of held-to-maturity securities	$ 5.1	$ 4.3

Factoring of Accounts Receiva_2

Factoring of Accounts Receivable (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Total Factored
Factoring of Accounts Receivable [Line Items]
Accounts receivable sold	$ 49.4	$ 73.3	$ 127.4	$ 165.5
Discounts and Fees
Factoring of Accounts Receivable [Line Items]
Accounts receivable sold	$ 0.1	$ 0.2	$ 0.3	$ 0.4

Property, Plant and Equipment_2

Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Finance lease assets	$ 190,836	$ 165,122
Total property, plant and equipment	9,761,409	9,371,331
Accumulated depreciation and amortization	(6,451,817)	(6,235,717)
Total property, plant and equipment, net	3,309,592	3,135,614
Land
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	212,450	214,763
Buildings and improvements
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	1,828,664	1,817,135
Machinery and equipment
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	6,862,988	6,757,652
Furniture, fixtures and other equipment
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	22,617	23,240
Software and computer equipment
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	243,811	240,610
Construction in progress
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	$ 400,043	$ 152,809

Property, Plant and Equipment -

Property, Plant and Equipment - Schedule of Depreciation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Property, Plant and Equipment [Abstract]
Depreciation expense	$ 157,742	$ 150,999	$ 314,357	$ 299,038

Property, Plant and Equipment_3

Property, Plant and Equipment - Narrative (Details) - Vietnam - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Construction of manufacturing facility, incurred costs	$ 256.3	$ 79.6
Capitalized interest	$ 3.1	$ 0.7

Accrued Expenses (Details)

Accrued Expenses (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Payables and Accruals [Abstract]
Payroll and benefits	$ 102,355	$ 137,445
Deferred revenue and customer advances	75,890	81,459
Short-term finance lease liabilities	$ 63,595	$ 56,570
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	Total accrued expenses	Total accrued expenses
Income taxes payable	$ 42,181	$ 50,685
Accrued interest	11,050	10,878
Accrued severance plan obligations	6,989	7,422
Other accrued expenses	52,462	57,382
Total accrued expenses	$ 354,522	$ 401,841

Debt (Details)

Debt (Details)	2 Months Ended	6 Months Ended
	Sep. 30, 2022	Jun. 30, 2023 USD ($)	Jun. 30, 2023 KRW (₩)	Dec. 31, 2022 USD ($)	Jun. 30, 2022	Mar. 31, 2022 USD ($)	Apr. 30, 2021 KRW (₩) borrowing	Dec. 31, 2019 USD ($)
Debt Instrument [Line Items]
Total debt		$ 1,137,430,000		$ 1,239,772,000
Less: Unamortized discount and deferred debt costs, net		(5,917,000)		(7,438,000)
Less: Short-term borrowings and current portion of long-term debt		(155,978,000)		(143,813,000)
Long-term debt		975,535,000		1,088,521,000
Collateralized debt		600,000,000
Asset Pledged as Collateral
Debt Instrument [Line Items]
Collateralized debt		349,200,000
Short-term term loans, variable rate | Japan | Subsidiary Term Loans
Debt Instrument [Line Items]
Total debt		3,451,000		4,042,000
Borrowing capacity available		$ 8,400,000
Short-term term loans, variable rate | Japan | Subsidiary Term Loans | Weighted Average
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)		0.26%	0.26%
Short-term term loans, variable rate | Japan | TIBOR | Subsidiary Term Loans | Minimum
Debt Instrument [Line Items]
Interest rate spread (as a percent)		0.18%
Short-term term loans, variable rate | Japan | TIBOR | Subsidiary Term Loans | Maximum
Debt Instrument [Line Items]
Interest rate spread (as a percent)		0.27%
Senior Notes | 6.625% Senior notes, due September 2027
Debt Instrument [Line Items]
Interest rate (as a percent)		6.625%	6.625%
Total debt		$ 525,000,000		525,000,000
Subsidiary Term Loans | Term loan, fixed rate at 1.85%, due April 2024 | Korea
Debt Instrument [Line Items]
Interest rate (as a percent)		1.85%	1.85%
Total debt		$ 0		0
Face amount of debt | ₩							₩ 80,000,000,000
Number of annual borrowings | borrowing							6
Borrowing capacity available		$ 61,000,000	₩ 80,000,000,000
Subsidiary Term Loans | Term loan, fixed rate at 2.12%, due December 2028 | Korea
Debt Instrument [Line Items]
Interest rate (as a percent)		2.12%	2.12%
Total debt		$ 200,000,000		200,000,000
Subsidiary Term Loans | Term loan, fixed rate at 1.30%, due July 2023 | Japan
Debt Instrument [Line Items]
Interest rate (as a percent)		1.30%	1.30%
Total debt		$ 9,008,000		29,744,000
Subsidiary Term Loans | Term loan, fixed rate at 1.35%, due December 2024 | Japan
Debt Instrument [Line Items]
Interest rate (as a percent)		1.35%	1.35%
Total debt		$ 59,247,000		86,943,000
Subsidiary Term Loans | Term loan, fixed rate at 1.20%, due December 2025 | Japan
Debt Instrument [Line Items]
Interest rate (as a percent)		1.20%	1.20%
Total debt		$ 37,766,000		49,878,000
Subsidiary Term Loans | Term loan, fixed rate at 1.23%, due December 2026 | Japan
Debt Instrument [Line Items]
Interest rate (as a percent)		1.23%	1.23%
Total debt		$ 63,544,000		79,927,000
Subsidiary Term Loans | Term loan, fixed rate at 1.59%, due December 2027 | Japan
Debt Instrument [Line Items]
Interest rate (as a percent)		1.59%	1.59%
Total debt		$ 97,914,000		119,738,000
Subsidiary Term Loans | Term Loan, SOFR plus 0.75% Due March 2024 | China
Debt Instrument [Line Items]
Total debt		45,000,000		46,000,000
Subsidiary Term Loans | Term Loan, SOFR plus 0.75% Due March 2024 | China | SOFR
Debt Instrument [Line Items]
Interest rate spread (as a percent)	0.75%
Subsidiary Term Loans | Term Loan, SOFR Plus 0.75% Due June 2025 | China
Debt Instrument [Line Items]
Total debt		38,000,000		39,000,000
Subsidiary Term Loans | Term Loan, SOFR Plus 0.75% Due June 2025 | China | SOFR
Debt Instrument [Line Items]
Interest rate spread (as a percent)	0.75%
Subsidiary Term Loans | Term Loan, SOFR Plus 0.75% Due 2025 | China
Debt Instrument [Line Items]
Total debt		$ 58,500,000		59,500,000
Subsidiary Term Loans | Term Loan, SOFR Plus 0.75% Due 2025 | China | SOFR
Debt Instrument [Line Items]
Interest rate spread (as a percent)	0.75%
Subsidiary Term Loans | Amended All Term Loan, Annual Base Rate | China
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)		5.80%	5.80%
Line of Credit | Credit facility, TAIFX plus the applicable bank rate, due December 2024 (Taiwan) | Revolving Credit Facility | Taiwan
Debt Instrument [Line Items]
Total debt		$ 0		0
Borrowing capacity available		15,000,000
Credit facility, borrowing capacity						$ 15,000,000		$ 36,000,000
Line of Credit | $600.0 million senior secured revolving credit facility, applicable bank rate plus 1.75%, due March 2027 (Singapore) | Revolving Credit Facility | Singapore
Debt Instrument [Line Items]
Interest rate (as a percent)					1.75%
Total debt		0		$ 0
Credit facility, borrowing capacity						600,000,000
Line of Credit | 2022 Singapore Revolver | Revolving Credit Facility | Singapore
Debt Instrument [Line Items]
Borrowing capacity available		$ 600,000,000
Credit facility, base amount						$ 250,000,000
Credit facility percentage of variable borrowings						37.50%

Pension Plans - Components of N

Pension Plans - Components of Net Periodic Pension Cost (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Retirement Benefits [Abstract]
Service cost	$ 3,697	$ 5,088	$ 7,525	$ 10,506
Interest cost	1,558	1,204	3,161	2,462
Expected return on plan assets	(1,278)	(1,428)	(2,589)	(2,921)
Recognized actuarial loss	(105)	13	(203)	26
Net periodic pension cost	$ 3,872	$ 4,877	$ 7,894	$ 10,073

Pension Plans - Summary of Defi

Pension Plans - Summary of Defined Contribution Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Retirement Benefits [Abstract]
Defined contribution expense	$ 6,253	$ 5,554	$ 15,049	$ 13,503

Derivatives (Details)

Derivatives (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Derivatives, Fair Value [Line Items]
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Accrued Liabilities, Current		Accrued Liabilities, Current		Accrued Liabilities, Current
Derivative Asset, Current, Statement of Financial Position [Extensible Enumeration]	Other Assets, Current		Other Assets, Current		Other Assets, Current
Net loss on derivatives	$ (26,400)	$ (42,800)	$ (38,400)	$ (65,100)
Foreign Exchange Forward
Derivatives, Fair Value [Line Items]
Notional Value	353,929		353,929		$ 427,954
Foreign Exchange Forward | Level 2
Derivatives, Fair Value [Line Items]
Derivative, fair value, net	(725)		(725)		6,554
Foreign Exchange Forward | Japanese yen
Derivatives, Fair Value [Line Items]
Notional Value	206,666		206,666		330,179
Foreign Exchange Forward | Japanese yen | Level 2
Derivatives, Fair Value [Line Items]
Derivative asset, fair value					6,284
Derivative liability, fair value	(753)		(753)
Foreign Exchange Forward | Korean won
Derivatives, Fair Value [Line Items]
Notional Value	94,259		94,259		65,927
Foreign Exchange Forward | Korean won | Level 2
Derivatives, Fair Value [Line Items]
Derivative asset, fair value	69		69		333
Foreign Exchange Forward | Philippine peso
Derivatives, Fair Value [Line Items]
Notional Value	3,655		3,655		3,085
Foreign Exchange Forward | Philippine peso | Level 2
Derivatives, Fair Value [Line Items]
Derivative asset, fair value	3		3
Derivative liability, fair value					(6)
Foreign Exchange Forward | Singapore dollar
Derivatives, Fair Value [Line Items]
Notional Value	27,479		27,479
Foreign Exchange Forward | Singapore dollar | Level 2
Derivatives, Fair Value [Line Items]
Derivative asset, fair value	6		6
Foreign Exchange Forward | Taiwan dollar
Derivatives, Fair Value [Line Items]
Notional Value	21,870		21,870		28,763
Foreign Exchange Forward | Taiwan dollar | Level 2
Derivatives, Fair Value [Line Items]
Derivative liability, fair value	$ (50)		$ (50)		$ (57)

Fair Value Measurements (Debt)

Fair Value Measurements (Debt) (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total debt	$ 1,116,733	$ 1,209,744
Fair Value | Senior notes (Level 1) | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total debt	526,596	523,016
Fair Value | Revolving credit facilities and term loans (Level 2) | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total debt	590,137	686,728
Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total debt	1,131,513	1,232,334
Carrying Value | Senior notes (Level 1)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total debt	521,470	521,114
Carrying Value | Revolving credit facilities and term loans (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total debt	$ 610,043	$ 711,220

Commitments and Contingencies (

Commitments and Contingencies (Details) $ in Millions	Jun. 30, 2023 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Amount of leases not yet commenced	$ 9