TPI Composites (TPIC) 10-Q 5 Nov 20 2020 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2020	Oct. 31, 2020
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3
Trading Symbol	TPIC
Entity Registrant Name	TPI Composites, Inc.
Entity Central Index Key	0001455684
Entity Current Reporting Status	Yes
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Shell Company	false
Entity Small Business	false
Entity Interactive Data Current	Yes
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		35,740,796
Entity Address, State or Province	AZ
Entity File Number	001-37839
Entity Tax Identification Number	20-1590775
Entity Address, Address Line One	8501 N. Scottsdale Rd.
Entity Address, Address Line Two	Gainey Center II, Suite 100
Entity Address, Postal Zip Code	85253
City Area Code	480
Local Phone Number	305-8910
Entity Address, City or Town	Scottsdale
Entity Incorporation, State or Country Code	DE
Document Quarterly Report	true
Document Transition Report	false
Title of 12(b) Security	Common Stock, par value $0.01
Security Exchange Name	NASDAQ

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 149,422	$ 70,282
Restricted cash	1,987	992
Accounts receivable	149,985	184,012
Contract assets	211,569	166,515
Prepaid expenses	15,950	10,047
Other current assets	21,794	29,843
Inventories	14,569	6,731
Total current assets	565,276	468,422
Property, plant, and equipment, net	210,024	205,007
Operating lease right of use assets	168,590	122,351
Other noncurrent assets	41,794	30,897
Total assets	985,684	826,677
Current liabilities:
Accounts payable and accrued expenses	310,344	293,104
Accrued warranty	53,596	47,639
Current maturities of long-term debt	35,788	13,501
Current operating lease liabilities	25,569	16,629
Contract liabilities	2,010	3,008
Total current liabilities	427,307	373,881
Long-term debt, net of debt issuance costs and current maturities	201,780	127,888
Noncurrent operating lease liabilities	165,551	113,883
Other noncurrent liabilities	9,594	5,975
Total liabilities	804,232	621,627
Commitments and contingencies (Note 12)
Stockholders’ equity:
Common shares, $0.01 par value, 100,000 shares authorized, 35,916 shares issued and 35,740 shares outstanding at September 30, 2020 and 100,000 shares authorized, 35,326 shares issued and 35,181 shares outstanding at December 31, 2019	359	353
Paid-in capital	338,355	322,906
Accumulated other comprehensive loss	(37,946)	(23,612)
Accumulated deficit	(114,900)	(90,689)
Treasury stock, at cost, 176 shares at September 30, 2020 and 145 shares at December 31, 2019	(4,416)	(3,908)
Total stockholders’ equity	181,452	205,050
Total liabilities and stockholders’ equity	$ 985,684	$ 826,677

CONDENSED CONSOLIDATED BALANC_2

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Sep. 30, 2020	Dec. 31, 2019
Statement Of Financial Position [Abstract]
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	35,916,000	35,326,000
Common stock, shares outstanding	35,740,000	35,181,000
Treasury stock, shares	176,000	145,000

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Statement [Abstract]
Net sales	$ 474,113	$ 383,836	$ 1,204,566	$ 1,014,387
Cost of sales	425,064	335,778	1,141,183	904,135
Startup and transition costs	8,576	22,127	31,530	63,206
Total cost of goods sold	433,640	357,905	1,172,713	967,341
Gross profit	40,473	25,931	31,853	47,046
General and administrative expenses	9,263	10,608	25,646	27,801
Realized loss on sale of assets and asset impairments	2,160	3,354	5,518	10,561
Restructuring charges (reversals), net	45	(149)	343	3,725
Income from operations	29,005	12,118	346	4,959
Other income (expense):
Interest income	15	43	55	125
Interest expense	(3,108)	(2,130)	(7,464)	(6,403)
Realized gain (loss) on foreign currency remeasurement	(17,127)	3,719	(18,095)	(1,050)
Miscellaneous income	1,259	517	2,893	2,235
Total other income (expense)	(18,961)	2,149	(22,611)	(5,093)
Income (loss) before income taxes	10,044	14,267	(22,265)	(134)
Income tax benefit (provision)	32,338	(18,838)	(1,946)	(14,713)
Net income (loss)	$ 42,382	$ (4,571)	$ (24,211)	$ (14,847)
Weighted-average common shares outstanding:
Basic	35,546	35,131	35,354	35,024
Diluted	37,423	35,131	35,354	35,024
Net income (loss) per common share:
Basic	$ 1.19	$ (0.13)	$ (0.68)	$ (0.42)
Diluted	$ 1.13	$ (0.13)	$ (0.68)	$ (0.42)

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ 42,382	$ (4,571)	$ (24,211)	$ (14,847)
Other comprehensive income (loss):
Foreign currency translation adjustments	(1,662)	(895)	(13,175)	(3,765)
Unrealized gain (loss) on hedging derivatives, net of taxes of $(1,100), $202, $0, and $967, respectively	2,961	(754)	(1,159)	(3,635)
Comprehensive income (loss)	$ 43,681	$ (6,220)	$ (38,545)	$ (22,247)

CONDENSED CONSOLIDATED STATEM_3

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement Of Income And Comprehensive Income [Abstract]
Unrealized gain (loss) on hedging derivatives	$ (1,100)	$ 202	$ 0	$ 967

CONDENSED CONSOLIDATED STATEM_4

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Paid-in Capital [Member]	Accumulated Other Comprehensive Loss [Member]	Accumulated Deficit [Member]	Treasury Stock, at Cost [Member]
Beginning balance at Dec. 31, 2018	$ 220,957	$ 347	$ 311,771	$ (14,392)	$ (74,981)	$ (1,788)
Beginning balance, shares at Dec. 31, 2018		34,745
Net income (loss)	(12,104)				(12,104)
Share-based compensation expense	821		821
Issuances under share-based compensation plan	4,639	$ 4	4,635
Issuances under share-based compensation plan, shares		355
Common stock repurchased for treasury	(559)					(559)
Other comprehensive income (loss)	(477)			(477)
Ending balance at Mar. 31, 2019	213,277	$ 351	317,227	(14,869)	(87,085)	(2,347)
Ending balance, shares at Mar. 31, 2019		35,100
Beginning balance at Dec. 31, 2018	220,957	$ 347	311,771	(14,392)	(74,981)	(1,788)
Beginning balance, shares at Dec. 31, 2018		34,745
Net income (loss)	(14,847)
Ending balance at Sep. 30, 2019	206,165	$ 353	321,340	(21,792)	(89,828)	(3,908)
Ending balance, shares at Sep. 30, 2019		35,299
Beginning balance at Mar. 31, 2019	213,277	$ 351	317,227	(14,869)	(87,085)	(2,347)
Beginning balance, shares at Mar. 31, 2019		35,100
Net income (loss)	1,828				1,828
Share-based compensation expense	2,057		2,057
Issuances under share-based compensation plan	144		144
Issuances under share-based compensation plan, shares		41
Other comprehensive income (loss)	(5,274)			(5,274)
Ending balance at Jun. 30, 2019	212,032	$ 351	319,428	(20,143)	(85,257)	(2,347)
Ending balance, shares at Jun. 30, 2019		35,141
Net income (loss)	(4,571)				(4,571)
Share-based compensation expense	1,905		1,905
Issuances under share-based compensation plan	9	$ 2	7
Issuances under share-based compensation plan, shares		158
Common stock repurchased for treasury	(1,561)					(1,561)
Other comprehensive income (loss)	(1,649)			(1,649)
Ending balance at Sep. 30, 2019	206,165	$ 353	321,340	(21,792)	(89,828)	(3,908)
Ending balance, shares at Sep. 30, 2019		35,299
Beginning balance at Dec. 31, 2019	205,050	$ 353	322,906	(23,612)	(90,689)	(3,908)
Beginning balance, shares at Dec. 31, 2019		35,326
Net income (loss)	(492)				(492)
Share-based compensation expense	2,970		2,970
Issuances under share-based compensation plan	862	$ 1	861
Issuances under share-based compensation plan, shares		109
Common stock repurchased for treasury	(459)					(459)
Other comprehensive income (loss)	(16,893)			(16,893)
Ending balance at Mar. 31, 2020	191,038	$ 354	326,737	(40,505)	(91,181)	(4,367)
Ending balance, shares at Mar. 31, 2020		35,435
Beginning balance at Dec. 31, 2019	205,050	$ 353	322,906	(23,612)	(90,689)	(3,908)
Beginning balance, shares at Dec. 31, 2019		35,326
Net income (loss)	(24,211)
Ending balance at Sep. 30, 2020	181,452	$ 359	338,355	(37,946)	(114,900)	(4,416)
Ending balance, shares at Sep. 30, 2020		35,911
Beginning balance at Mar. 31, 2020	191,038	$ 354	326,737	(40,505)	(91,181)	(4,367)
Beginning balance, shares at Mar. 31, 2020		35,435
Net income (loss)	(66,101)				(66,101)
Share-based compensation expense	2,186		2,186
Issuances under share-based compensation plan	511	$ 1	510
Issuances under share-based compensation plan, shares		81
Common stock repurchased for treasury	(49)					(49)
Other comprehensive income (loss)	1,260			1,260
Ending balance at Jun. 30, 2020	128,845	$ 355	329,433	(39,245)	(157,282)	(4,416)
Ending balance, shares at Jun. 30, 2020		35,516
Net income (loss)	42,382				42,382
Share-based compensation expense	2,434		2,434
Issuances under share-based compensation plan	6,492	$ 4	6,488
Issuances under share-based compensation plan, shares		395
Other comprehensive income (loss)	1,299			1,299
Ending balance at Sep. 30, 2020	$ 181,452	$ 359	$ 338,355	$ (37,946)	$ (114,900)	$ (4,416)
Ending balance, shares at Sep. 30, 2020		35,911

CONDENSED CONSOLIDATED STATEM_5

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities:
Net loss	$ (24,211)	$ (14,847)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	36,675	27,732
Realized loss on sale of assets and asset impairments	5,518	10,561
Restructuring charges, net	343	3,725
Share-based compensation expense	7,947	4,604
Amortization of debt issuance costs	237	155
Deferred income taxes	(9,375)	3,296
Changes in assets and liabilities:
Accounts receivable	27,723	15,583
Contract assets and liabilities	(48,185)	(55,952)
Operating lease right of use assets and operating lease liabilities	14,370	3,511
Inventories	(7,986)	(6,044)
Prepaid expenses	(6,066)	(10,419)
Other current assets	7,827	(10,296)
Other noncurrent assets	338	(5,178)
Accounts payable and accrued expenses	19,167	82,421
Accrued warranty	5,957	11,517
Other noncurrent liabilities	3,586	2,366
Net cash provided by operating activities	33,865	62,735
Cash flows from investing activities:
Purchases of property, plant and equipment	(53,428)	(59,092)
Acquisition of a business		(1,102)
Net cash used in investing activities	(53,428)	(60,194)
Cash flows from financing activities:
Proceeds from revolving loans	80,000	16,000
Repayments of revolving loans	(7,199)
Net repayments of accounts receivable financing	(3,979)	(5,415)
Proceeds from working capital loans		3,535
Repayments of working capital loans		(2,828)
Principal repayments of finance leases	(4,592)	(7,621)
Net proceeds (repayments) of other debt	32,311	(3,919)
Debt issuance costs	(730)
Proceeds from exercise of stock options	7,124	4,726
Repurchase of common stock including shares withheld in lieu of income taxes	(508)	(2,120)
Net cash provided by financing activities	102,427	2,358
Impact of foreign exchange rates on cash, cash equivalents and restricted cash	(3,204)	(115)
Net change in cash, cash equivalents and restricted cash	79,660	4,784
Cash, cash equivalents and restricted cash, beginning of year	71,749	89,376
Cash, cash equivalents and restricted cash, end of period	151,409	94,160
Supplemental cash flow information:
Cash paid for interest	6,871	6,397
Cash paid for income taxes, net of refunds	11,642	15,033
Noncash investing and financing activities:
Right of use assets obtained in exchange for new operating lease liabilities	67,705	12,205
Property, plant, and equipment obtained in exchange for new finance lease liabilities	131	5,122
Accrued capital expenditures in accounts payable	7,769	6,594
Reconciliation of Cash, Cash Equivalents and Restricted Cash:
Cash and cash equivalents	70,282	85,346
Restricted cash	992	3,555
Restricted cash included within other noncurrent assets	$ 475	$ 475
Restricted Cash, Noncurrent, Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssetsNoncurrent	us-gaap:OtherAssetsNoncurrent
Cash, cash equivalents and restricted cash, beginning of year	$ 71,749	$ 89,376
Cash and cash equivalents	149,422	92,085
Restricted cash	$ 1,987	1,600
Restricted cash included within other noncurrent assets		$ 475
Restricted Cash, Noncurrent, Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssetsNoncurrent	us-gaap:OtherAssetsNoncurrent
Cash, cash equivalents and restricted cash, end of period	$ 151,409	$ 94,160

Basis of Presentation and Recen

Basis of Presentation and Recently Issued Accounting Pronouncements	9 Months Ended
	Sep. 30, 2020
Accounting Policies [Abstract]
Basis of Presentation and Recently Issued Accounting Pronouncements	Note 1. Basis of Presentation and Recently Issued Accounting Pronouncements Basis of Presentation The condensed consolidated financial statements included herein have been prepared by us without audit, pursuant to the rules and regulations of the SEC and should be read in conjunction with the audited consolidated financial statements for the year ended December 31, 2019 included in our Annual Report on Form 10-K. Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States (GAAP) have been condensed or omitted, as permitted by the SEC, although we believe the disclosures that are made are adequate to make the information presented herein not misleading. The accompanying condensed consolidated financial statements reflect, in the opinion of our management, all normal recurring adjustments necessary to present fairly our financial position at September 30, 2020, and the results of our operations, comprehensive income (loss) and cash flows for the periods presented. Interim results for the three and nine months ended September 30, 2020 and 2019 are not necessarily indicative of the results to be expected for the full years. Certain prior period amounts in the condensed consolidated financial statements and accompanying notes have been reclassified to conform to the current period’s presentation. The preparation of these condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. The accompanying condensed consolidated financial statements include the accounts of TPI Composites, Inc. and all of our majority owned subsidiaries. All significant intercompany transactions and balances have been eliminated. References to TPI Composites, Inc, the “Company,” “we,” “us” or “our” in these notes refer to TPI Composites, Inc. and its consolidated subsidiaries. Recently Issued Accounting Pronouncements Accounting Pronouncements Adopted in 2020 Financial Instruments In June 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2016-13, Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments This standard was effective for all public business entities for annual and interim periods beginning after December 15, 2019, with early adoption permitted. We adopted this standard on January 1, 2020 and it did not have a material effect on our condensed consolidated financial statements. Fair Value Measurement In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement This standard was effective for all public business entities for annual and interim periods beginning after December 15, 2019, with early adoption permitted. We adopted this standard on January 1, 2020 and it did not have a material effect on our condensed consolidated financial statements. Income Taxes In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes, We adopted this standard on January 1, 2020 and it did not have a material effect on our condensed consolidated financial statements. Accounting Pronouncements Not Yet Adopted Reference Rate Reform In March 2020, the FASB issued ASU 2020-04 , Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting We are currently evaluating our contracts and the optional expedients provided by the new standard.

Revenue From Contracts with Cus

Revenue From Contracts with Customers	9 Months Ended
	Sep. 30, 2020
Revenue From Contract With Customer [Abstract]
Revenue From Contracts with Customers	Note 2. Revenue From Contracts with Customers For a detailed discussion of our revenue recognition policy, refer to the discussion in Note 1, Summary of Operations and Significant Accounting Policies – Revenue Recognition The following tables represents the disaggregation of our net sales revenue by product for each of our reportable segments: Three Months Ended September 30, 2020 U.S. Asia Mexico EMEAI Total (in thousands) Wind blade sales $ 37,272 $ 158,120 $ 153,575 $ 101,168 $ 450,135 Precision molding and assembly systems sales — 4,451 6,090 — 10,541 Transportation sales 6,206 — 801 — 7,007 Other sales 3,321 887 1,097 1,125 6,430 Total net sales $ 46,799 $ 163,458 $ 161,563 $ 102,293 $ 474,113 Three Months Ended September 30, 2019 U.S. Asia Mexico EMEAI Total (in thousands) Wind blade sales $ 25,857 $ 98,406 $ 111,855 $ 116,084 $ 352,202 Precision molding and assembly systems sales 1,479 8,915 4,655 — 15,049 Transportation sales 8,061 — — — 8,061 Other sales 5,246 793 1,180 1,305 8,524 Total net sales $ 40,643 $ 108,114 $ 117,690 $ 117,389 $ 383,836 Nine Months Ended September 30, 2020 U.S. Asia Mexico EMEAI Total (in thousands) Wind blade sales $ 99,514 $ 385,536 $ 346,954 $ 302,531 $ 1,134,535 Precision molding and assembly systems sales — 13,088 11,110 — 24,198 Transportation sales 27,424 — 1,374 — 28,798 Other sales 9,371 1,889 3,795 1,980 17,035 Total net sales $ 136,309 $ 400,513 $ 363,233 $ 304,511 $ 1,204,566 Nine Months Ended September 30, 2019 U.S. Asia Mexico EMEAI Total (in thousands) Wind blade sales $ 84,328 $ 238,947 $ 278,685 $ 328,956 $ 930,916 Precision molding and assembly systems sales 2,845 20,856 15,475 — 39,176 Transportation sales 20,717 — — — 20,717 Other sales 14,239 1,728 3,557 4,054 23,578 Total net sales $ 122,129 $ 261,531 $ 297,717 $ 333,010 $ 1,014,387 Most of our net sales are made directly to our customers, primarily large multi-national wind turbine manufacturers, under our long-term contracts which are typically five years in length. Contract Assets and Liabilities Contract assets consist of the amount of revenue recognized over time for performance obligations in production where control has transferred to the customer but the contract does not yet allow for the customer to be billed. Typically, customers are billed when the product finishes production and meets the technical specifications contained in the contract. The time it takes to produce a single blade is typically between 5 to 7 days. The time it takes to produce a mold is typically between 3 to 6 months. The contract assets are recorded as current assets in the condensed consolidated balance sheets. Contract liabilities consist of advance payments in excess of revenue earned. These amounts were historically recorded as customer deposits which usually relate to progress payments received as precision molding and assembly systems were being manufactured. The contract liabilities are recorded as current liabilities in the condensed consolidated balance sheets and are reduced as we record revenue over time. These contract assets and liabilities are reported on the condensed consolidated balance sheets net on a contract-by-contract basis at the end of each reporting period, as demonstrated in the table below. Contract assets and contract liabilities consisted of the following: September 30, December 31, 2020 2019 $ Change (in thousands) Gross contract assets $ 214,586 $ 170,973 $ 43,613 Less: reclassification from contract liabilities (3,017 ) (4,458 ) 1,441 Contract assets $ 211,569 $ 166,515 $ 45,054 September 30, December 31, 2020 2019 $ Change (in thousands) Gross contract liabilities $ 5,027 $ 7,466 $ (2,439 ) Less: reclassification to contract assets (3,017 ) (4,458 ) 1,441 Contract liabilities $ 2,010 $ 3,008 $ (998 ) Contract assets increased by $45.1 million from December 31, 2019 to September 30, 2020 due to incremental unbilled production, which includes materials acquired under long-term contracts, during the nine months ended September 30, 2020. Contracts liabilities decreased by $1.0 million from December 31, 2019 to September 30, 2020 due to the revenue earned related to precision molding and assembly systems and wind blades being produced exceeding the amounts billed to customers in the nine months ended September 30, 2020. For the three and nine months ended September 30, 2020, we recognized no revenue and $3.0 million of revenue, respectively, related to precision molding and assembly systems and wind blades, which were included in the corresponding contract liability balance at the beginning of the period. Performance Obligations Remaining performance obligations represent the transaction price for which work has not been performed and excludes any unexercised contract options. The transaction price includes estimated variable consideration as determined based on the estimated production output within the range of the contractual guaranteed minimum volume obligations and production capacity. As of September 30, 2020, the aggregate amount of the transaction price allocated to the remaining performance obligations to be satisfied in future periods was approximately $3.8 billion. We estimate that we will recognize these remaining performance obligations as revenue as follows: $ % of Total (in thousands) Year Ending December 31, Remainder of 2020 $ 448,348 11.9 % 2021 1,609,674 42.5 % 2022 1,095,947 29.0 % 2023 554,245 14.6 % 2024 75,954 2.0 % Total remaining performance obligations $ 3,784,168 100.0 % The transaction price allocated to the remaining performance obligations excludes approximately $178.0 million of variable consideration over the contractual guaranteed minimum volume obligations under current contracts with customers which has been constrained primarily due to uncertainty associated with production volume during the remaining term of the agreements. We estimate the constraint will be resolved in subsequent periods when our customers provide additional information relevant to forecasted future production. For the three and nine months ended September 30, 2020, net revenue recognized from our performance obligations satisfied in previous periods increased by $14.8 million and $15.4 million, respectively, as compared to decreases of $3.5 million and $16.0 million, respectively, in the same periods of 2019. The current year increase primarily related to changes in certain of our estimated total contract values and related direct costs to complete the performance obligations.

Significant Risks and Uncertain

Significant Risks and Uncertainties	9 Months Ended
	Sep. 30, 2020
Risks And Uncertainties [Abstract]
Significant Risks and Uncertainties	Note 3. Significant Risks and Uncertainties Our revenues and receivables are earned from a small number of customers. As such, our production levels are dependent on these customers’ orders. See Note 13, Concentration of Customers The COVID-19 pandemic adversely impacted our operations and results of operations for the nine months ended September 30, 2020 due to reduced production levels at a majority of our manufacturing facilities primarily during the first and second quarters of 2020 as a result of certain applicable government-mandated stay at home orders in response to the COVID-19 pandemic, demands from certain of our labor unions to suspend or reduce production and general safety concerns of our associates. By the end of the second quarter of 2020, most of our manufacturing facilities had returned to operating at or near normal production levels. For the third quarter of 2020, the COVID-19 pandemic did not have a material adverse impact on our operations and results of operations. However, several of our manufacturing facilities are operating in regions with high levels of reported COVID-19 positive cases. As such, we may be required to reinstate temporary production suspensions or volume reductions at these manufacturing facilities or at our other manufacturing facilities to the extent there is a resurgence of COVID-19 cases in the regions where we operate or there is an outbreak of positive COVID-19 cases in any of our manufacturing facilities. We maintain our U.S. cash in bank deposit and money market accounts that, at times, exceed U.S. federally insured limits. U.S. bank accounts are guaranteed by the Federal Deposit Insurance Corporation (FDIC) in an amount up to $250,000 during 2020 and 2019. U.S. money market accounts are not guaranteed by the FDIC. At September 30, 2020 and December 31, 2019, we had $76.0 million and $45.8 million, respectively, of cash in bank deposit and money market accounts in U.S. banks, which was in excess of FDIC limits. We have not experienced losses in any such accounts. We also maintain cash in bank deposit accounts outside the U.S. with no insurance. At September 30, 2020, this included $47.2 million in China, $18.8 million in Turkey, $6.2 million in India, $1.0 million in Mexico and $0.2 million in other countries. We have not experienced losses in these accounts. In addition, at September 30, 2020 , we ha d short-term deposits in interest bearing accounts of $ 1.7 million in the U.S. , and $ 0.3 million in China, which are reported as restricted cash in our condensed consolidated balance sheets.

Accrued Warranty

Accrued Warranty	9 Months Ended
	Sep. 30, 2020
Product Warranties Disclosures [Abstract]
Accrued Warranty	Note 4. Accrued Warranty We provide a limited warranty for our wind blades and related precision molding and assembly systems, including materials and workmanship, with terms and conditions that vary depending on the product sold, generally for periods that range from two to five years. We also provide a limited warranty for our transportation products, including materials and workmanship, with terms and conditions that vary depending on the product sold, generally for a period of approximately two years. Warranty expense is recorded based upon estimates of future repairs using a probability-based methodology that considers previous warranty claims, identified quality issues and industry practices. Once the warranty period has expired, any remaining unused warranty accrual for the specific products is generally reversed against the current year warranty expense amount. As of September 30, 2020, a change in the estimated warranty accrual rate of 1% across all products would change the warranty accrual by approximately $39.5 million. The warranty accrual activity for the periods noted consisted of the following: Three Months Ended Nine Months Ended September 30, September 30, 2020 2019 2020 2019 (in thousands) Warranty accrual at beginning of period $ 56,772 $ 42,834 $ 47,639 $ 36,765 Accrual during the period 5,963 7,390 14,337 18,413 Cost of warranty services provided during the period (10,895 ) 36 (19,377 ) (2,409 ) Changes in estimate for pre-existing warranties, including expirations during the period 1,756 (1,978 ) 10,997 (4,487 ) Warranty accrual at end of period $ 53,596 $ 48,282 $ 53,596 $ 48,282

Long-Term Debt, Net of Debt Iss

Long-Term Debt, Net of Debt Issuance Costs and Current Maturities	9 Months Ended
	Sep. 30, 2020
Debt Disclosure [Abstract]
Long-Term Debt, Net of Debt Issuance Costs and Current Maturities	Note 5. Long-Term Debt, Net of Debt Issuance Costs and Current Maturities Long-term debt, net of debt issuance costs and current maturities, consisted of the following: September 30, December 31, 2020 2019 (in thousands) Senior revolving loan—U.S. $ 185,215 $ 112,414 Accounts receivable financing—EMEAI — 3,805 Unsecured financing—EMEAI 34,743 — Equipment financing—EMEAI 5,165 7,903 Equipment finance lease—U.S. 147 288 Equipment finance lease—EMEAI 4,488 5,732 Equipment finance lease—Mexico 8,975 11,919 Total debt - principal 238,733 142,061 Less: Debt issuance costs (1,165 ) (672 ) Total debt, net of debt issuance costs 237,568 141,389 Less: Current maturities of long-term debt (35,788 ) (13,501 ) Long-term debt, net of debt issuance costs and current maturities $ 201,780 $ 127,888 Senior Revolving Loan - In February 2020, we entered into an Incremental Facility Agreement with the current lenders to our Credit Agreement and an additional lender, pursuant to which the aggregate principal amount of our revolving credit facility under the Credit Agreement was increased from $ 150.0 million to $ 205.0 million. All borrowings and amounts outstanding under the Credit Agreement are scheduled to mature in April 2023 . In June 2020, we entered into an amendment to our Credit Agreement which made certain adjustments to one of the financial covenants, added new covenants related to minimum liquidity and mandatory repayment triggers, provided for certain modifications to the affirmative and negative covenants and changed the interest rate during the Adjustment Period (as defined in the Credit Agreement) to a LIBOR floor of 0.75% plus a margin of 3.0% per annum. The interest rate following the end of the Adjustment Period would be equal to a LIBOR floor of 0.75% plus a margin ranging between 1.75% to 2.50% per annum. All other material terms and conditions of the Credit Agreement remained the same. Unsecured Financing - EMEAI: In the fourth quarter of 2019, we entered into a credit agreement with a Turkish financial institution to provide up to 100.0 million Turkish Lira (approximately $12.8 million as of September 30, 2020) of unsecured financing. Interest accrues at a fixed rate of 2.0% and is payable at the end of the term when the loan is repaid. The credit agreement does not have an expiration date, however the limits are reviewed in January of each year to establish available capacity. As of September 30, 2020, there was $3.5 In the first quarter of 2020, we entered into a credit agreement, as amended, with a Turkish financial institution to provide up to $18.0 million of unsecured financing. Interest accrues at a fixed rate of 2.4% and is payable quarterly. The maturity date for amounts currently outstanding is March 2023. The credit agreement does not have an expiration date, however the limits are reviewed in December of each year to establish available capacity. As of September 30, 2020, there was $14.7 million outstanding under this credit agreement. In the first quarter of 2020, we entered into a credit agreement with a Turkish financial institution to provide up to 5.0 million Euro (approximately $5.9 million as of September 30, 2020) of unsecured financing. Interest accrues at a fixed rate of 5.0% and is payable at the end of the term when the loan is repaid. The credit agreement does not have an expiration date, however the limits are reviewed in February of each year to establish available capacity. As of September 30, 2020, there were no amounts outstanding under this credit agreement. In the second and third quarters of 2020, we amended an existing credit agreement with a Turkish financial institution to provide up to 31.0 million Euro (approximately $36.3 million as of September 30, 2020) of financing of which 11.0 million Euro (approximately $12.9 million as of September 30, 2020) is comprised of unsecured financing, letters of credit and other non-cash items and 20.0 million Euro (approximately $23.4 million as of September 30, 2020) related to an unsecured revolving credit facility. Interest on the 11.0 million Euro facility was determined based upon the term of the loan utilizing the one-month Euro Interbank Offered Rate (EURIBOR) plus 1.50% (1.50%) and was fully paid on the loan origination date. Interest on the 20.0 million Euro facility accrues at a fixed rate of 4.75% and is payable at the end of the term when the loan is repaid. The maturity date for amounts currently outstanding under the 11.0 million Euro facility is April 2021. The facilities do not have an expiration date, however the limits are reviewed in July of each year to establish available capacity. As of September 30, 2020, there was approximately 9.1 million Euro, or $10.7 million, outstanding under the 11.0 million Euro facility and none outstanding under the 20.0 million Euro facility. In the third quarter of 2020, we amended an existing credit agreement with a Turkish financial institution to provide up to $21.0 million of unsecured financing. Interest on the unsecured financing accrues at a fixed rate of 3.0% and is payable at the end of the term when the loan is repaid. The maturity date for amounts currently outstanding is February 2021. The unsecured financing agreement does not have an expiration date, however the limits are reviewed in September of each year to establish available capacity. As of September 30, 2020, there was $5.8 million outstanding under the credit agreement.

Share-Based Compensation Plans

Share-Based Compensation Plans	9 Months Ended
	Sep. 30, 2020
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Share-Based Compensation Plans	Note 6. Share-Based Compensation Plans During the nine months ended September 30, 2020, we issued to certain employees and non-employee directors an aggregate of 461,732 timed-based restricted stock units (RSUs), 122,752 performance-based restricted stock units (PSUs) that vest upon achievement of a cumulative, three-year Adjusted EBITDA target measured from January 1, 2020 through December 31, 2022, and 198,826 PSUs that vest upon achievement of certain stock price hurdles for the period of the grant date through December 31, 2022. All of the time-based RSUs vest on the third anniversary date of the grant date. Each of the time-based and performance-based awards are subject to the recipient’s continued service with us, the terms and conditions of the 2015 Plan and the applicable award agreement. In addition, during the nine months ended September 30, 2020 , we issued stock options to certain employee s and non-employee directors . The share-based compensation expense recognized in the condensed consolidated statements of operations was as follows: Three Months Ended Nine Months Ended September 30, September 30, 2020 2019 2020 2019 (in thousands) Cost of goods sold $ 479 $ (35 ) $ 1,115 $ 313 General and administrative expenses 2,152 1,717 6,832 4,291 Total share-based compensation expense $ 2,631 $ 1,682 $ 7,947 $ 4,604 The share-based compensation expense recognized by award type was as follows: Three Months Ended Nine Months Ended September 30, September 30, 2020 2019 2020 2019 (in thousands) RSUs $ 1,262 $ 869 $ 3,399 $ 2,800 Stock options 700 225 2,952 955 PSUs 669 588 1,596 849 Total share-based compensation expense $ 2,631 $ 1,682 $ 7,947 $ 4,604 Included in total share-based compensation expense for the nine months ended September 30, 2020 is $1.7 million of compensation expense associated with the modification of certain employee and non-employee awards during the nine month period. The modifications primarily provided for the extension of the post termination exercise period of outstanding stock options, resulting in a one-time charge in the nine months ended September 30, 2020.

Leases

Leases	9 Months Ended
	Sep. 30, 2020
Leases [Abstract]
Leases	Note 7. Leases We have operating and finance leases for our manufacturing facilities, warehouses, offices, automobiles and certain of our machinery and equipment. Our leases have remaining lease terms of between one and 15 years, some of which may include options to extend the leases up to five years. The components of lease cost were as follows: Three Months Ended Nine Months Ended September 30, September 30, 2020 2019 2020 2019 (in thousands) Total operating lease cost $ 9,546 $ 7,893 $ 27,265 $ 23,830 Finance lease cost Amortization of assets under finance leases $ 1,529 $ 1,749 $ 4,489 $ 4,970 Interest on finance leases 240 323 775 1,119 Total finance lease cost $ 1,769 $ 2,072 $ 5,264 $ 6,089 Total lease liabilities as of September 30, 2020 were as follows: Operating Finance Leases Leases (in thousands) Current operating lease liabilities $ 25,569 $ — Current maturities of long-term debt — 5,855 Noncurrent operating lease liabilities 165,551 — Long-term debt, net of debt issuance costs and current maturities — 7,755 Total lease liabilities $ 191,120 $ 13,610 As of September 30, 2020, the cost and accumulated depreciation of property, plant and equipment that we are leasing under finance lease arrangements were $42.7 million and $20.4 million, respectively. As of December 31, 2019, the cost and accumulated depreciation of property, plant and equipment that we are leasing under finance lease arrangements were $45.0 million and $17.0 million, respectively. Future minimum lease payments under noncancelable leases as of September 30, 2020 were as follows: Operating Finance Leases Leases (in thousands) Year Ending December 31, Remainder of 2020 $ 8,413 $ 1,317 2021 35,295 6,544 2022 32,796 5,763 2023 31,010 865 2024 27,787 222 Thereafter 130,592 7 Total future minimum lease payments 265,893 14,718 Less: interest (74,773 ) (1,108 ) Total lease liabilities $ 191,120 $ 13,610 Other information related to leases was as follows: Nine Months Ended September 30, 2020 2019 (in thousands) Supplemental Cash Flow Information Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 22,308 $ 22,977 Operating cash flows from finance leases 775 1,119 Financing cash flows from finance leases 4,592 7,621 Right of use assets obtained in exchange for new lease obligations: Operating leases 67,705 12,205 Finance leases 131 5,122 September 30, December 31, 2020 2019 Weighted-Average Remaining Lease Term (In Years): Operating leases 7.9 7.6 Finance leases 2.5 3.2 Weighted-Average Discount Rate: Operating leases 7.9 % 7.5 % Finance leases 6.4 % 6.4 % As of September 30, 2020, there were no additional leases related to new manufacturing facilities that have not yet commenced.

Financial Instruments

Financial Instruments	9 Months Ended
	Sep. 30, 2020
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Financial Instruments	Note 8. Financial Instruments Interest Rate Swap We use interest rate swap contracts to mitigate our exposure to interest rate fluctuations associated with our credit agreement (the Credit Agreement) that we entered into in April 2018. We do not use such swap contracts for speculative or trading purposes. To partially offset the variability of future interest payments on the Credit Agreement arising from changes in LIBOR, in April 2018, we entered into an interest rate swap agreement with a financial institution for a notional amount of $75.0 million with an expiration date of April 2023. This interest rate swap effectively hedges $75.0 million of the future variable rate LIBOR interest expense converting it to a fixed rate interest expense. The derivative instrument qualified for accounting as a cash flow hedge in accordance with FASB Accounting Standard Codification (ASC) Topic 815, Derivatives and Hedging, Foreign Exchange Forward Contracts We use foreign exchange forward contracts to mitigate our exposure to fluctuations in exchange rates between the functional currencies of our subsidiaries and the other currencies in which they transact. In September 2019, we entered into the first of these foreign exchange forward contracts. We do not use such forward contracts for speculative or trading purposes. We expect certain of our subsidiaries to have future cash flows that will be denominated in currencies other than the subsidiaries’ functional currencies. Changes in the exchange rates between the functional currencies of our subsidiaries and the other currencies in which they transact will cause fluctuations in the cash flows we expect to receive or pay when these cash flows are realized or settled. Accordingly, we enter into foreign exchange forward contracts to hedge a portion of these forecasted cash flows. As of September 30, 2020, these foreign exchange forward contracts hedge our forecasted cash flows for periods up to six months. These foreign exchange forward contracts qualified for accounting as cash flow hedges in accordance with ASC Topic 815, and we designated them as such. All of our derivative assets and liabilities measured at fair value are classified as Level 2 within the fair value hierarchy. For a detailed discussion of the fair value hierarchy, refer to the discussion in Note 1, Summary of Operations and Significant Accounting Policies – Fair Value of Financial Instruments As of September 30, 2020 and December 31, 2019, the notional values associated with our foreign exchange forward contracts qualifying as cash flow hedges were 0.8 billion Mexican Pesos (approximately $32.2 million) and 1.1 billion Mexican Pesos (approximately $54.8 million), respectively. The fair values and location of financial instruments in our condensed consolidated balance sheets were as follows: Condensed Consolidated September 30, December 31, Financial Instrument Balance Sheet Line Item 2020 2019 (in thousands) Interest rate swap Other noncurrent liabilities 4,882 2,723 Foreign exchange forward contracts Other current assets 1,696 820 Foreign exchange forward contracts Accounts payable and accrued expenses — 124 For cash flow hedges, the gain or loss is reported as a component of accumulated other comprehensive loss in our condensed consolidated statements of changes in stockholders’ equity and reclassified into earnings in our condensed consolidated statements of operations in the same period or periods during which the hedged transaction affects earnings. The net income (loss) recognized in accumulated other comprehensive loss in our condensed consolidated statements of changes in stockholders’ equity for our foreign exchange forward contracts is expected to be recognized in Cost of Sales in our condensed consolidated statements of operations during the next six months. The gain or loss on our interest rate swap is recorded in accumulated other comprehensive loss and subsequently reclassified into Interest Expense in our condensed consolidated statements of operations in the period in which the hedged transaction affects earnings. As of September 30, 2020, no interest rate swaps originally designated for hedge accounting were de-designated or terminated. No ineffectiveness on our interest rate swaps was recognized as of September 30, 2020, and none is anticipated over the term of the agreement. The following table presents the pretax amounts reclassified from accumulated other comprehensive loss into our condensed consolidated statements of operations: Condensed Three Months Ended Nine Months Ended Comprehensive Income Consolidated Statement September 30, September 30, (Loss) Component of Operations Line Item 2020 2019 2020 2019 (in thousands) Foreign exchange forward contracts Cost of sales $ 1,546 $ — $ 4,062 $ —

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2020
Income Tax Disclosure [Abstract]
Income Taxes	Note 9. Income Taxes Income taxes for the three and nine months ended September 30, 2020 were lower than for the corresponding periods ended September 30, 2019 primarily due to the impact of a change in the forecasted annual effective tax rates and the earnings mix by jurisdiction in 2020 as compared to 2019. The forecasted effective tax rate for the current year differs from the U.S. statutory income tax rate primarily due to earnings in foreign jurisdictions with income tax rates that exceed the U.S. statutory income tax rate, losses incurred by an entity in a tax-free zone, and the establishment of a full valuation allowance on U.S. deferred items. The Internal Revenue Service (IRS) issued final regulations in July 2020 to clarify Global Intangible Low Tax Income (GILTI) under the Tax Cuts and Jobs Act allowing us to make an annual election to exclude GILTI of our foreign subsidiaries with an effective tax rate greater than 90% of the U.S. corporate rate. The impact for this change in legislation was offset by the establishment of a full valuation allowance in the U.S. during the quarter. No additional changes in tax law occurred during the quarter which have a material impact on our income tax provision. We do not record a deferred tax liability related to unremitted foreign earnings as we maintain our assertion to indefinitely reinvest our unremitted foreign earnings.

Net Income (Loss) Per Common Sh

Net Income (Loss) Per Common Share Calculation	9 Months Ended
	Sep. 30, 2020
Earnings Per Share [Abstract]
Net Income (Loss) Per Common Share Calculation	Note 10. Net Income (Loss) Per Common Share Calculation Basic net income (loss) per common share is computed by dividing the net income (loss) by the weighted-average number of common shares outstanding during a period. Diluted net income per common share is computed by giving effect to all potentially dilutive securities, unless there is a net loss for the period and/or performance-based awards which are not included until performance conditions are met. In computing diluted net income per common share, we use the treasury stock method. The table below reflects the calculation of the weighted-average number of common shares outstanding, using the treasury stock method, used in computing basic and diluted net income (loss) per common share: Three Months Ended Nine Months Ended September 30, September 30, 2020 2019 2020 2019 (in thousands) Basic weighted-average shares outstanding 35,546 35,131 35,354 35,024 Effect of dilutive awards 1,877 — — — Diluted weighted-average shares outstanding 37,423 35,131 35,354 35,024 Since there were net losses for the nine months ended September 30, 2020, approximately 1,400,000 potentially dilutive shares were excluded from the calculation. Additionally, since there were net losses for the three and nine months ended September 30, 2019, approximately 980,000 and 1,304,000 potentially dilutive shares were excluded from the calculation. In addition, the table below summarizes the approximate number of share-based compensation awards which were excluded from the computation of net income (loss) per common share because their effect would be anti-dilutive: Three Months Ended Nine Months Ended September 30, September 30, 2020 2019 2020 2019 Anti-dilutive shares 1,000 27,000 33,000 14,000

Stockholders_ Equity

Stockholders’ Equity	9 Months Ended
	Sep. 30, 2020
Equity [Abstract]
Stockholders Equity	Note 11. Stockholders’ Equity Accumulated Other Comprehensive Loss The following tables presents the changes in accumulated other comprehensive loss (AOCL) by component: Nine Months Ended September 30, 2020 Foreign Foreign currency exchange translation Interest rate forward Total adjustments swap contracts AOCL (in thousands) Balance at December 31, 2019 $ (22,012 ) $ (2,145 ) $ 545 $ (23,612 ) Other comprehensive income (loss) before reclassifications (9,223 ) (2,550 ) (6,936 ) (18,709 ) Amounts reclassified from AOCL — — (222 ) (222 ) Net tax effect — 535 1,503 2,038 Net current period other comprehensive income (loss) (9,223 ) (2,015 ) (5,655 ) (16,893 ) Balance at March 31, 2020 (31,235 ) (4,160 ) (5,110 ) (40,505 ) Other comprehensive income (loss) before reclassifications (2,290 ) — 1,750 (540 ) Amounts reclassified from AOCL — — 2,738 2,738 Net tax effect — — (938 ) (938 ) Net current period other comprehensive income (loss) (2,290 ) — 3,550 1,260 Balance at June 30, 2020 (33,525 ) (4,160 ) (1,560 ) (39,245 ) Other comprehensive income (loss) before reclassifications (1,662 ) 391 2,124 853 Amounts reclassified from AOCL — — 1,546 1,546 Net tax effect — (535 ) (565 ) (1,100 ) Net current period other comprehensive income (loss) (1,662 ) (144 ) 3,105 1,299 Balance at September 30, 2020 $ (35,187 ) $ (4,304 ) $ 1,545 $ (37,946 ) Nine Months Ended September 30, 2019 Foreign Foreign currency exchange translation Interest rate forward Total adjustments swap contracts AOCL (in thousands) Balance at December 31, 2018 $ (14,986 ) $ 594 $ — $ (14,392 ) Other comprehensive income (loss) before reclassifications 1,333 (2,291 ) — (958 ) Amounts reclassified from AOCL — — — — Net tax effect — 481 — 481 Net current period other comprehensive income (loss) 1,333 (1,810 ) — (477 ) Balance at March 31, 2019 (13,653 ) (1,216 ) — (14,869 ) Other comprehensive income (loss) before reclassifications (4,203 ) (1,355 ) — (5,558 ) Amounts reclassified from AOCL — — — — Net tax effect — 284 — 284 Net current period other comprehensive income (loss) (4,203 ) (1,071 ) — (5,274 ) Balance at June 30, 2019 (17,856 ) (2,287 ) — (20,143 ) Other comprehensive income (loss) before reclassifications (895 ) (395 ) (561 ) (1,851 ) Amounts reclassified from AOCL — — — — Net tax effect — 84 118 202 Net current period other comprehensive income (loss) (895 ) (311 ) (443 ) (1,649 ) Balance at September 30, 2019 $ (18,751 ) $ (2,598 ) $ (443 ) $ (21,792 )

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2020
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 12. Commitments and Contingencies Legal Proceedings From time to time, we are party to various lawsuits, claims, and other legal proceedings that arise in the ordinary course of business, some of which are covered by insurance. Upon resolution of any pending legal matters, we may incur charges in excess of presently established reserves or our insurance policy limits. Our management does not believe that any such charges would, individually or in the aggregate, have a material adverse effect on our financial condition, results of operations or cash flows.

Concentration of Customers

Concentration of Customers	9 Months Ended
	Sep. 30, 2020
Risks And Uncertainties [Abstract]
Concentration of Customers	Note 13. Concentration of Customers Revenues from certain customers (in thousands) in excess of 10 percent of our total consolidated revenues are as follows: Three Months Ended Nine Months Ended September 30, September 30, 2020 2019 2020 2019 Customer Revenues % of Total Revenues % of Total Revenues % of Total Revenues % of Total Vestas $ 240,710 50.8 % $ 176,018 45.9 % $ 591,548 49.1 % $ 446,733 44.0 % GE 124,523 26.3 % 96,312 25.1 % 295,831 24.6 % 272,859 26.9 % Nordex 53,182 11.2 % 61,514 16.0 % 168,697 14.0 % 170,044 16.8 % Trade accounts receivable from certain customers in excess of 10 percent of our total consolidated trade accounts receivable are as follows: September 30, December 31, 2020 2019 Customer % of Total % of Total Vestas 41.3 % 41.9 % Nordex 32.4 % 31.3 %

Segment Reporting

Segment Reporting	9 Months Ended
	Sep. 30, 2020
Segment Reporting [Abstract]
Segment Reporting	Note 14. Segment Reporting Our operating segments are defined geographically into four geographic operating segments—(1) the United States (U.S.), (2) Asia, (3) Mexico and (4) Europe, the Middle East, Africa and India (EMEAI). For a detailed discussion of our operating segments, refer to the discussion in Note 1, Summary of Operations and Significant Accounting Policies – Basis of Presentation Financial results are aggregated into these four reportable segments based on quantitative thresholds. All of our segments operate in their local currency, however a portion of the revenue attributable to our Asia and Mexico segments is derived in U.S. dollars because certain of our domestic subsidiaries are the contracting parties to the associated customer supply agreements. The following tables set forth certain information regarding each of our segments: Three Months Ended Nine Months Ended September 30, September 30, 2020 2019 2020 2019 (in thousands) Revenues by segment: U.S. $ 46,799 $ 40,643 $ 136,309 $ 122,129 Asia 163,458 108,114 400,513 261,531 Mexico 161,563 117,690 363,233 297,717 EMEAI 102,293 117,389 304,511 333,010 Total revenues $ 474,113 $ 383,836 $ 1,204,566 $ 1,014,387 Revenues by geographic location (1) U.S. $ 46,799 $ 40,643 $ 136,309 $ 122,129 China 163,458 108,114 400,513 261,531 Mexico 161,563 117,690 363,233 297,717 Turkey and India 102,293 117,389 304,511 333,010 Total revenues $ 474,113 $ 383,836 $ 1,204,566 $ 1,014,387 Income (loss) from operations: U.S. (2) $ (6,360 ) $ (17,510 ) $ (33,991 ) $ (54,235 ) Asia 25,779 13,448 49,343 4,779 Mexico 11,986 (4,954 ) (1,106 ) (1,258 ) EMEAI (2,400 ) 21,134 (13,900 ) 55,673 Total income from operations $ 29,005 $ 12,118 $ 346 $ 4,959 September 30, December 31, 2020 2019 (in thousands) Property, plant and equipment, net: U.S. $ 32,088 $ 36,410 Asia (China) 48,276 50,603 Mexico 80,601 81,654 EMEAI (Turkey and India) 49,059 36,340 Total property, plant and equipment, net $ 210,024 $ 205,007 (1) Revenues are attributable to countries based on the location where the product is manufactured or the services are performed. (2) The losses from operations in our U.S. segment includes corporate general and administrative costs of $9.3 million and $10.6 million for the three months ended September 30, 2020 and 2019, respectively, and $25.6 million and $27.8 million for the nine months ended September 30, 2020 and 2019, respectively.

Basis of Presentation and Rec_2

Basis of Presentation and Recently Issued Accounting Pronouncements (Policies)	9 Months Ended
	Sep. 30, 2020
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The condensed consolidated financial statements included herein have been prepared by us without audit, pursuant to the rules and regulations of the SEC and should be read in conjunction with the audited consolidated financial statements for the year ended December 31, 2019 included in our Annual Report on Form 10-K. Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States (GAAP) have been condensed or omitted, as permitted by the SEC, although we believe the disclosures that are made are adequate to make the information presented herein not misleading. The accompanying condensed consolidated financial statements reflect, in the opinion of our management, all normal recurring adjustments necessary to present fairly our financial position at September 30, 2020, and the results of our operations, comprehensive income (loss) and cash flows for the periods presented. Interim results for the three and nine months ended September 30, 2020 and 2019 are not necessarily indicative of the results to be expected for the full years. Certain prior period amounts in the condensed consolidated financial statements and accompanying notes have been reclassified to conform to the current period’s presentation. The preparation of these condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. The accompanying condensed consolidated financial statements include the accounts of TPI Composites, Inc. and all of our majority owned subsidiaries. All significant intercompany transactions and balances have been eliminated. References to TPI Composites, Inc, the “Company,” “we,” “us” or “our” in these notes refer to TPI Composites, Inc. and its consolidated subsidiaries.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements Accounting Pronouncements Adopted in 2020 Financial Instruments In June 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2016-13, Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments This standard was effective for all public business entities for annual and interim periods beginning after December 15, 2019, with early adoption permitted. We adopted this standard on January 1, 2020 and it did not have a material effect on our condensed consolidated financial statements. Fair Value Measurement In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement This standard was effective for all public business entities for annual and interim periods beginning after December 15, 2019, with early adoption permitted. We adopted this standard on January 1, 2020 and it did not have a material effect on our condensed consolidated financial statements. Income Taxes In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes, We adopted this standard on January 1, 2020 and it did not have a material effect on our condensed consolidated financial statements. Accounting Pronouncements Not Yet Adopted Reference Rate Reform In March 2020, the FASB issued ASU 2020-04 , Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting We are currently evaluating our contracts and the optional expedients provided by the new standard.

Revenue From Contracts with C_2

Revenue From Contracts with Customers (Tables)	9 Months Ended
	Sep. 30, 2020
Revenue From Contract With Customer [Abstract]
Summary of Disaggregation of Net Sales Revenue by Product for Each of Reportable Segments	The following tables represents the disaggregation of our net sales revenue by product for each of our reportable segments: Three Months Ended September 30, 2020 U.S. Asia Mexico EMEAI Total (in thousands) Wind blade sales $ 37,272 $ 158,120 $ 153,575 $ 101,168 $ 450,135 Precision molding and assembly systems sales — 4,451 6,090 — 10,541 Transportation sales 6,206 — 801 — 7,007 Other sales 3,321 887 1,097 1,125 6,430 Total net sales $ 46,799 $ 163,458 $ 161,563 $ 102,293 $ 474,113 Three Months Ended September 30, 2019 U.S. Asia Mexico EMEAI Total (in thousands) Wind blade sales $ 25,857 $ 98,406 $ 111,855 $ 116,084 $ 352,202 Precision molding and assembly systems sales 1,479 8,915 4,655 — 15,049 Transportation sales 8,061 — — — 8,061 Other sales 5,246 793 1,180 1,305 8,524 Total net sales $ 40,643 $ 108,114 $ 117,690 $ 117,389 $ 383,836 Nine Months Ended September 30, 2020 U.S. Asia Mexico EMEAI Total (in thousands) Wind blade sales $ 99,514 $ 385,536 $ 346,954 $ 302,531 $ 1,134,535 Precision molding and assembly systems sales — 13,088 11,110 — 24,198 Transportation sales 27,424 — 1,374 — 28,798 Other sales 9,371 1,889 3,795 1,980 17,035 Total net sales $ 136,309 $ 400,513 $ 363,233 $ 304,511 $ 1,204,566 Nine Months Ended September 30, 2019 U.S. Asia Mexico EMEAI Total (in thousands) Wind blade sales $ 84,328 $ 238,947 $ 278,685 $ 328,956 $ 930,916 Precision molding and assembly systems sales 2,845 20,856 15,475 — 39,176 Transportation sales 20,717 — — — 20,717 Other sales 14,239 1,728 3,557 4,054 23,578 Total net sales $ 122,129 $ 261,531 $ 297,717 $ 333,010 $ 1,014,387
Summary of Contract Assets and Contract Liabilities	Contract assets and contract liabilities consisted of the following: September 30, December 31, 2020 2019 $ Change (in thousands) Gross contract assets $ 214,586 $ 170,973 $ 43,613 Less: reclassification from contract liabilities (3,017 ) (4,458 ) 1,441 Contract assets $ 211,569 $ 166,515 $ 45,054 September 30, December 31, 2020 2019 $ Change (in thousands) Gross contract liabilities $ 5,027 $ 7,466 $ (2,439 ) Less: reclassification to contract assets (3,017 ) (4,458 ) 1,441 Contract liabilities $ 2,010 $ 3,008 $ (998 )
Schedule of Estimate to Recognize Remaining Performance Obligations as Revenue	We estimate that we will recognize these remaining performance obligations as revenue as follows: $ % of Total (in thousands) Year Ending December 31, Remainder of 2020 $ 448,348 11.9 % 2021 1,609,674 42.5 % 2022 1,095,947 29.0 % 2023 554,245 14.6 % 2024 75,954 2.0 % Total remaining performance obligations $ 3,784,168 100.0 %

Accrued Warranty (Tables)

Accrued Warranty (Tables)	9 Months Ended
	Sep. 30, 2020
Product Warranties Disclosures [Abstract]
Schedule of Warranty Accrual Activity	The warranty accrual activity for the periods noted consisted of the following: Three Months Ended Nine Months Ended September 30, September 30, 2020 2019 2020 2019 (in thousands) Warranty accrual at beginning of period $ 56,772 $ 42,834 $ 47,639 $ 36,765 Accrual during the period 5,963 7,390 14,337 18,413 Cost of warranty services provided during the period (10,895 ) 36 (19,377 ) (2,409 ) Changes in estimate for pre-existing warranties, including expirations during the period 1,756 (1,978 ) 10,997 (4,487 ) Warranty accrual at end of period $ 53,596 $ 48,282 $ 53,596 $ 48,282

Long-Term Debt, Net of Debt I_2

Long-Term Debt, Net of Debt Issuance Costs and Current Maturities (Tables)	9 Months Ended
	Sep. 30, 2020
Debt Disclosure [Abstract]
Schedule of Long-Term Debt, Net of Debt Issuance Costs and Current Maturities	Long-term debt, net of debt issuance costs and current maturities, consisted of the following: September 30, December 31, 2020 2019 (in thousands) Senior revolving loan—U.S. $ 185,215 $ 112,414 Accounts receivable financing—EMEAI — 3,805 Unsecured financing—EMEAI 34,743 — Equipment financing—EMEAI 5,165 7,903 Equipment finance lease—U.S. 147 288 Equipment finance lease—EMEAI 4,488 5,732 Equipment finance lease—Mexico 8,975 11,919 Total debt - principal 238,733 142,061 Less: Debt issuance costs (1,165 ) (672 ) Total debt, net of debt issuance costs 237,568 141,389 Less: Current maturities of long-term debt (35,788 ) (13,501 ) Long-term debt, net of debt issuance costs and current maturities $ 201,780 $ 127,888

Share-Based Compensation Plans

Share-Based Compensation Plans (Tables)	9 Months Ended
	Sep. 30, 2020
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Schedule of Share-based Compensation Expense Recognized in Condensed Consolidated Statements of Operations	The share-based compensation expense recognized in the condensed consolidated statements of operations was as follows: Three Months Ended Nine Months Ended September 30, September 30, 2020 2019 2020 2019 (in thousands) Cost of goods sold $ 479 $ (35 ) $ 1,115 $ 313 General and administrative expenses 2,152 1,717 6,832 4,291 Total share-based compensation expense $ 2,631 $ 1,682 $ 7,947 $ 4,604
Schedule of Share-based Compensation Arrangements by Share-based Payment Award	The share-based compensation expense recognized by award type was as follows: Three Months Ended Nine Months Ended September 30, September 30, 2020 2019 2020 2019 (in thousands) RSUs $ 1,262 $ 869 $ 3,399 $ 2,800 Stock options 700 225 2,952 955 PSUs 669 588 1,596 849 Total share-based compensation expense $ 2,631 $ 1,682 $ 7,947 $ 4,604

Leases (Tables)

Leases (Tables)	9 Months Ended
	Sep. 30, 2020
Leases [Abstract]
Components of Lease Cost	The components of lease cost were as follows: Three Months Ended Nine Months Ended September 30, September 30, 2020 2019 2020 2019 (in thousands) Total operating lease cost $ 9,546 $ 7,893 $ 27,265 $ 23,830 Finance lease cost Amortization of assets under finance leases $ 1,529 $ 1,749 $ 4,489 $ 4,970 Interest on finance leases 240 323 775 1,119 Total finance lease cost $ 1,769 $ 2,072 $ 5,264 $ 6,089
Schedule of Lease Liabilities	Total lease liabilities as of September 30, 2020 were as follows: Operating Finance Leases Leases (in thousands) Current operating lease liabilities $ 25,569 $ — Current maturities of long-term debt — 5,855 Noncurrent operating lease liabilities 165,551 — Long-term debt, net of debt issuance costs and current maturities — 7,755 Total lease liabilities $ 191,120 $ 13,610
Schedule of Future Minimum Lease Payments under Noncancelable Leases	Future minimum lease payments under noncancelable leases as of September 30, 2020 were as follows: Operating Finance Leases Leases (in thousands) Year Ending December 31, Remainder of 2020 $ 8,413 $ 1,317 2021 35,295 6,544 2022 32,796 5,763 2023 31,010 865 2024 27,787 222 Thereafter 130,592 7 Total future minimum lease payments 265,893 14,718 Less: interest (74,773 ) (1,108 ) Total lease liabilities $ 191,120 $ 13,610
Other Information Related to Leases	Other information related to leases was as follows: Nine Months Ended September 30, 2020 2019 (in thousands) Supplemental Cash Flow Information Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 22,308 $ 22,977 Operating cash flows from finance leases 775 1,119 Financing cash flows from finance leases 4,592 7,621 Right of use assets obtained in exchange for new lease obligations: Operating leases 67,705 12,205 Finance leases 131 5,122 September 30, December 31, 2020 2019 Weighted-Average Remaining Lease Term (In Years): Operating leases 7.9 7.6 Finance leases 2.5 3.2 Weighted-Average Discount Rate: Operating leases 7.9 % 7.5 % Finance leases 6.4 % 6.4 %

Financial Instruments (Tables)

Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2020
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Fair Values and Location of Financial Instruments	The fair values and location of financial instruments in our condensed consolidated balance sheets were as follows: Condensed Consolidated September 30, December 31, Financial Instrument Balance Sheet Line Item 2020 2019 (in thousands) Interest rate swap Other noncurrent liabilities 4,882 2,723 Foreign exchange forward contracts Other current assets 1,696 820 Foreign exchange forward contracts Accounts payable and accrued expenses — 124
Schedule of Pretax Amounts Reclassified From Accumulated Other Comprehensive Loss	The following table presents the pretax amounts reclassified from accumulated other comprehensive loss into our condensed consolidated statements of operations: Condensed Three Months Ended Nine Months Ended Comprehensive Income Consolidated Statement September 30, September 30, (Loss) Component of Operations Line Item 2020 2019 2020 2019 (in thousands) Foreign exchange forward contracts Cost of sales $ 1,546 $ — $ 4,062 $ —

Net Income (Loss) Per Common _2

Net Income (Loss) Per Common Share Calculation (Tables)	9 Months Ended
	Sep. 30, 2020
Earnings Per Share [Abstract]
Calculation Of Weighted-Average Number Of Common Shares Outstanding	The table below reflects the calculation of the weighted-average number of common shares outstanding, using the treasury stock method, used in computing basic and diluted net income (loss) per common share: Three Months Ended Nine Months Ended September 30, September 30, 2020 2019 2020 2019 (in thousands) Basic weighted-average shares outstanding 35,546 35,131 35,354 35,024 Effect of dilutive awards 1,877 — — — Diluted weighted-average shares outstanding 37,423 35,131 35,354 35,024
Summary of Number of Anti-dilutive Share-based Compensation Awards Excluded from Computation of Net Income (Loss) per Common Share	In addition, the table below summarizes the approximate number of share-based compensation awards which were excluded from the computation of net income (loss) per common share because their effect would be anti-dilutive: Three Months Ended Nine Months Ended September 30, September 30, 2020 2019 2020 2019 Anti-dilutive shares 1,000 27,000 33,000 14,000

Stockholders_ Equity (Tables)

Stockholders’ Equity (Tables)	9 Months Ended
	Sep. 30, 2020
Equity [Abstract]
Schedule of Changes in Accumulated Other Comprehensive Loss	The following tables presents the changes in accumulated other comprehensive loss (AOCL) by component: Nine Months Ended September 30, 2020 Foreign Foreign currency exchange translation Interest rate forward Total adjustments swap contracts AOCL (in thousands) Balance at December 31, 2019 $ (22,012 ) $ (2,145 ) $ 545 $ (23,612 ) Other comprehensive income (loss) before reclassifications (9,223 ) (2,550 ) (6,936 ) (18,709 ) Amounts reclassified from AOCL — — (222 ) (222 ) Net tax effect — 535 1,503 2,038 Net current period other comprehensive income (loss) (9,223 ) (2,015 ) (5,655 ) (16,893 ) Balance at March 31, 2020 (31,235 ) (4,160 ) (5,110 ) (40,505 ) Other comprehensive income (loss) before reclassifications (2,290 ) — 1,750 (540 ) Amounts reclassified from AOCL — — 2,738 2,738 Net tax effect — — (938 ) (938 ) Net current period other comprehensive income (loss) (2,290 ) — 3,550 1,260 Balance at June 30, 2020 (33,525 ) (4,160 ) (1,560 ) (39,245 ) Other comprehensive income (loss) before reclassifications (1,662 ) 391 2,124 853 Amounts reclassified from AOCL — — 1,546 1,546 Net tax effect — (535 ) (565 ) (1,100 ) Net current period other comprehensive income (loss) (1,662 ) (144 ) 3,105 1,299 Balance at September 30, 2020 $ (35,187 ) $ (4,304 ) $ 1,545 $ (37,946 ) Nine Months Ended September 30, 2019 Foreign Foreign currency exchange translation Interest rate forward Total adjustments swap contracts AOCL (in thousands) Balance at December 31, 2018 $ (14,986 ) $ 594 $ — $ (14,392 ) Other comprehensive income (loss) before reclassifications 1,333 (2,291 ) — (958 ) Amounts reclassified from AOCL — — — — Net tax effect — 481 — 481 Net current period other comprehensive income (loss) 1,333 (1,810 ) — (477 ) Balance at March 31, 2019 (13,653 ) (1,216 ) — (14,869 ) Other comprehensive income (loss) before reclassifications (4,203 ) (1,355 ) — (5,558 ) Amounts reclassified from AOCL — — — — Net tax effect — 284 — 284 Net current period other comprehensive income (loss) (4,203 ) (1,071 ) — (5,274 ) Balance at June 30, 2019 (17,856 ) (2,287 ) — (20,143 ) Other comprehensive income (loss) before reclassifications (895 ) (395 ) (561 ) (1,851 ) Amounts reclassified from AOCL — — — — Net tax effect — 84 118 202 Net current period other comprehensive income (loss) (895 ) (311 ) (443 ) (1,649 ) Balance at September 30, 2019 $ (18,751 ) $ (2,598 ) $ (443 ) $ (21,792 )

Concentration of Customers (Tab

Concentration of Customers (Tables)	9 Months Ended
	Sep. 30, 2020
Risks And Uncertainties [Abstract]
Schedule of Revenues from Customers	Revenues from certain customers (in thousands) in excess of 10 percent of our total consolidated revenues are as follows: Three Months Ended Nine Months Ended September 30, September 30, 2020 2019 2020 2019 Customer Revenues % of Total Revenues % of Total Revenues % of Total Revenues % of Total Vestas $ 240,710 50.8 % $ 176,018 45.9 % $ 591,548 49.1 % $ 446,733 44.0 % GE 124,523 26.3 % 96,312 25.1 % 295,831 24.6 % 272,859 26.9 % Nordex 53,182 11.2 % 61,514 16.0 % 168,697 14.0 % 170,044 16.8 %
Schedule of Trade Accounts Receivable from Certain Customers	Trade accounts receivable from certain customers in excess of 10 percent of our total consolidated trade accounts receivable are as follows: September 30, December 31, 2020 2019 Customer % of Total % of Total Vestas 41.3 % 41.9 % Nordex 32.4 % 31.3 %

Segment Reporting (Tables)

Segment Reporting (Tables)	9 Months Ended
	Sep. 30, 2020
Segment Reporting [Abstract]
Schedule of Segment Information	The following tables set forth certain information regarding each of our segments: Three Months Ended Nine Months Ended September 30, September 30, 2020 2019 2020 2019 (in thousands) Revenues by segment: U.S. $ 46,799 $ 40,643 $ 136,309 $ 122,129 Asia 163,458 108,114 400,513 261,531 Mexico 161,563 117,690 363,233 297,717 EMEAI 102,293 117,389 304,511 333,010 Total revenues $ 474,113 $ 383,836 $ 1,204,566 $ 1,014,387 Revenues by geographic location (1) U.S. $ 46,799 $ 40,643 $ 136,309 $ 122,129 China 163,458 108,114 400,513 261,531 Mexico 161,563 117,690 363,233 297,717 Turkey and India 102,293 117,389 304,511 333,010 Total revenues $ 474,113 $ 383,836 $ 1,204,566 $ 1,014,387 Income (loss) from operations: U.S. (2) $ (6,360 ) $ (17,510 ) $ (33,991 ) $ (54,235 ) Asia 25,779 13,448 49,343 4,779 Mexico 11,986 (4,954 ) (1,106 ) (1,258 ) EMEAI (2,400 ) 21,134 (13,900 ) 55,673 Total income from operations $ 29,005 $ 12,118 $ 346 $ 4,959 September 30, December 31, 2020 2019 (in thousands) Property, plant and equipment, net: U.S. $ 32,088 $ 36,410 Asia (China) 48,276 50,603 Mexico 80,601 81,654 EMEAI (Turkey and India) 49,059 36,340 Total property, plant and equipment, net $ 210,024 $ 205,007 (1) Revenues are attributable to countries based on the location where the product is manufactured or the services are performed. (2) The losses from operations in our U.S. segment includes corporate general and administrative costs of $9.3 million and $10.6 million for the three months ended September 30, 2020 and 2019, respectively, and $25.6 million and $27.8 million for the nine months ended September 30, 2020 and 2019, respectively.

Basis of Presentation and Rec_3

Basis of Presentation and Recently Issued Accounting Pronouncements - Additional Information (Detail)	Sep. 30, 2020
Accounting Standards Update 2016-13 [Member]
Basis Of Presentation And Recently Issued Accounting Pronouncements [Line Items]
Change in accounting principle, accounting standards update, adopted	true
Change in accounting principle, accounting standards update, adoption date	Jan. 1, 2020
Change in accounting principle, accounting standards update, immaterial effect	true
Accounting Standards Update 2018-13 [Member]
Basis Of Presentation And Recently Issued Accounting Pronouncements [Line Items]
Change in accounting principle, accounting standards update, adopted	true
Change in accounting principle, accounting standards update, adoption date	Jan. 1, 2020
Change in accounting principle, accounting standards update, immaterial effect	true
Accounting Standards Update 2019-12 [Member]
Basis Of Presentation And Recently Issued Accounting Pronouncements [Line Items]
Change in accounting principle, accounting standards update, adopted	true
Change in accounting principle, accounting standards update, adoption date	Jan. 1, 2020
Change in accounting principle, accounting standards update, immaterial effect	true

Revenue From Contracts with C_3

Revenue From Contracts with Customers - Summary of Disaggregation of Net Sales Revenue by Product for Each of Reportable Segments (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation Of Revenue [Line Items]
Net sales revenue	$ 474,113	$ 383,836	$ 1,204,566	$ 1,014,387
U.S. Segment [Member]
Disaggregation Of Revenue [Line Items]
Net sales revenue	46,799	40,643	136,309	122,129
Asia Segment [Member]
Disaggregation Of Revenue [Line Items]
Net sales revenue	163,458	108,114	400,513	261,531
Mexico Segment [Member]
Disaggregation Of Revenue [Line Items]
Net sales revenue	161,563	117,690	363,233	297,717
EMEAI Segment [Member]
Disaggregation Of Revenue [Line Items]
Net sales revenue	102,293	117,389	304,511	333,010
Wind Blades [Member]
Disaggregation Of Revenue [Line Items]
Net sales revenue	450,135	352,202	1,134,535	930,916
Wind Blades [Member] | U.S. Segment [Member]
Disaggregation Of Revenue [Line Items]
Net sales revenue	37,272	25,857	99,514	84,328
Wind Blades [Member] | Asia Segment [Member]
Disaggregation Of Revenue [Line Items]
Net sales revenue	158,120	98,406	385,536	238,947
Wind Blades [Member] | Mexico Segment [Member]
Disaggregation Of Revenue [Line Items]
Net sales revenue	153,575	111,855	346,954	278,685
Wind Blades [Member] | EMEAI Segment [Member]
Disaggregation Of Revenue [Line Items]
Net sales revenue	101,168	116,084	302,531	328,956
Precision Molding and Assembly Systems [Member]
Disaggregation Of Revenue [Line Items]
Net sales revenue	10,541	15,049	24,198	39,176
Precision Molding and Assembly Systems [Member] | U.S. Segment [Member]
Disaggregation Of Revenue [Line Items]
Net sales revenue		1,479		2,845
Precision Molding and Assembly Systems [Member] | Asia Segment [Member]
Disaggregation Of Revenue [Line Items]
Net sales revenue	4,451	8,915	13,088	20,856
Precision Molding and Assembly Systems [Member] | Mexico Segment [Member]
Disaggregation Of Revenue [Line Items]
Net sales revenue	6,090	4,655	11,110	15,475
Transportation [Member]
Disaggregation Of Revenue [Line Items]
Net sales revenue	7,007	8,061	28,798	20,717
Transportation [Member] | U.S. Segment [Member]
Disaggregation Of Revenue [Line Items]
Net sales revenue	6,206	8,061	27,424	20,717
Transportation [Member] | Mexico Segment [Member]
Disaggregation Of Revenue [Line Items]
Net sales revenue	801		1,374
Other [Member]
Disaggregation Of Revenue [Line Items]
Net sales revenue	6,430	8,524	17,035	23,578
Other [Member] | U.S. Segment [Member]
Disaggregation Of Revenue [Line Items]
Net sales revenue	3,321	5,246	9,371	14,239
Other [Member] | Asia Segment [Member]
Disaggregation Of Revenue [Line Items]
Net sales revenue	887	793	1,889	1,728
Other [Member] | Mexico Segment [Member]
Disaggregation Of Revenue [Line Items]
Net sales revenue	1,097	1,180	3,795	3,557
Other [Member] | EMEAI Segment [Member]
Disaggregation Of Revenue [Line Items]
Net sales revenue	$ 1,125	$ 1,305	$ 1,980	$ 4,054

Revenue From Contracts with C_4

Revenue From Contracts with Customers - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue from Contracts with Customers
Increase in contract assets			$ 45,054,000
Decrease in contracts liabilities			998,000
Transaction price allocated to remaining performance obligations to be satisfied in future periods	$ 3,784,168,000		3,784,168,000
Variable consideration over contractual guaranteed minimum volume obligations	178,000,000		178,000,000
Net revenue recognized from performance obligations satisfied in previous periods,increase (decrease) amount	14,800,000	$ (3,500,000)	15,400,000	$ (16,000,000)
Precision Molding And Assembly Systems And Wind Blades [Member]
Revenue from Contracts with Customers
Contract liability revenue recognized	$ 0		$ 3,000,000
Minimum [Member]
Revenue from Contracts with Customers
Production hours of single blade			5 days
Production time of mold			3 months
Maximum [Member]
Revenue from Contracts with Customers
Production hours of single blade			7 days
Production time of mold			6 months
Long-term Contract with Customer [Member] | Net Sales, Directly to Consumer [Member]
Revenue from Contracts with Customers
Contracts with customer, length			5 years

Revenue From Contracts with C_5

Revenue From Contracts with Customers - Summary of Contract Assets (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Revenue From Contract With Customer [Abstract]
Gross contract assets	$ 214,586	$ 170,973
Less: reclassification from contract liabilities	(3,017)	(4,458)
Contract assets	211,569	$ 166,515
Gross contract assets, Change	43,613
Less: reclassification from contract liabilities, Change	1,441
Contract assets, Change	$ 45,054

Revenue From Contracts with C_6

Revenue From Contracts with Customers - Summary of Contract Liabilities (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Revenue From Contract With Customer [Abstract]
Gross contract liabilities	$ 5,027	$ 7,466
Less: reclassification to contract assets	(3,017)	(4,458)
Contract liabilities	2,010	$ 3,008
Gross contract liabilities, Change	(2,439)
Less: reclassification to contract assets, Change	1,441
Contract liabilities, Change	$ (998)

Revenue From Contracts with C_7

Revenue From Contracts with Customers - Schedule of Estimate to Recognize Remaining Performance Obligations as Revenue (Detail) $ in Thousands	Sep. 30, 2020USD ($)
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Total remaining performance obligations	$ 3,784,168
% of Total remaining performance obligations	100.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2020-10-01
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Total remaining performance obligations	$ 448,348
% of Total remaining performance obligations	11.90%
Remaining performance obligations, expected timing of satisfaction period	3 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2021-01-01
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Total remaining performance obligations	$ 1,609,674
% of Total remaining performance obligations	42.50%
Remaining performance obligations, expected timing of satisfaction period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2022-01-01
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Total remaining performance obligations	$ 1,095,947
% of Total remaining performance obligations	29.00%
Remaining performance obligations, expected timing of satisfaction period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2023-01-01
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Total remaining performance obligations	$ 554,245
% of Total remaining performance obligations	14.60%
Remaining performance obligations, expected timing of satisfaction period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2024-01-01
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Total remaining performance obligations	$ 75,954
% of Total remaining performance obligations	2.00%
Remaining performance obligations, expected timing of satisfaction period	1 year

Revenue From Contracts with C_8

Revenue From Contracts with Customers - Schedule of Estimate to Recognize Remaining Performance Obligations as Revenue (Detail1) $ in Thousands	Sep. 30, 2020USD ($)
Revenue From Contract With Customer [Abstract]
Total remaining performance obligations	$ 3,784,168
% of Total remaining performance obligations	100.00%

Significant Risks and Uncerta_2

Significant Risks and Uncertainties - Additional Information (Detail) - USD ($)	Sep. 30, 2020	Dec. 31, 2019
Concentration Risk [Line Items]
Cash in short-term deposits in interest bearing accounts	$ 1,987,000	$ 992,000
U.S. [Member]
Concentration Risk [Line Items]
Cash in bank deposit and money market accounts	76,000,000	45,800,000
Cash in short-term deposits in interest bearing accounts	1,700,000
China [Member]
Concentration Risk [Line Items]
Cash in bank deposit and money market accounts	47,200,000
Cash in short-term deposits in interest bearing accounts	300,000
Turkey [Member]
Concentration Risk [Line Items]
Cash in bank deposit and money market accounts	18,800,000
India [Member]
Concentration Risk [Line Items]
Cash in bank deposit and money market accounts	6,200,000
Mexico [Member]
Concentration Risk [Line Items]
Cash in bank deposit and money market accounts	1,000,000
Other Countries [Member]
Concentration Risk [Line Items]
Cash in bank deposit and money market accounts	200,000
Maximum [Member]
Concentration Risk [Line Items]
Cash deposit insured amount	$ 250,000	$ 250,000

Accrued Warranty - Additional I

Accrued Warranty - Additional Information (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2020USD ($)
Product Warranty Liability [Line Items]
Change in estimated warranty accrual rate	1.00%
Change in warranty accrual due to change in estimated warranty accrual rate	$ 39.5
Mold and Wind Blade Products [Member] | Minimum [Member]
Product Warranty Liability [Line Items]
Limited warranty period	2 years
Mold and Wind Blade Products [Member] | Maximum [Member]
Product Warranty Liability [Line Items]
Limited warranty period	5 years
Transportation [Member]
Product Warranty Liability [Line Items]
Limited warranty period	2 years

Accrued Warranty - Schedule of

Accrued Warranty - Schedule of Warranty Accrual Activity (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Product Warranties Disclosures [Abstract]
Warranty accrual at beginning of period	$ 56,772	$ 42,834	$ 47,639	$ 36,765
Accrual during the period	5,963	7,390	14,337	18,413
Cost of warranty services provided during the period	(10,895)	36	(19,377)	(2,409)
Changes in estimate for pre-existing warranties, including expirations during the period	1,756	(1,978)	10,997	(4,487)
Warranty accrual at end of period	$ 53,596	$ 48,282	$ 53,596	$ 48,282

Long-Term Debt, Net of Debt I_3

Long-Term Debt, Net of Debt Issuance Costs and Current Maturities - Schedule of Long-Term Debt, Net of Debt Issuance Costs and Current Maturities (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Total long-term debt
Total long-term debt	$ 238,733	$ 142,061
Less: Debt issuance costs	(1,165)	(672)
Total debt, net of debt issuance costs	237,568	141,389
Less: Current maturities of long-term debt	(35,788)	(13,501)
Long-term debt, net of debt issuance costs and current maturities	201,780	127,888
Senior Revolving Loan [Member] | U.S. [Member]
Total long-term debt
Total long-term debt	185,215	112,414
Accounts Receivable Financing [Member] | EMEAI [Member]
Total long-term debt
Total long-term debt		3,805
Unsecured Financing [Member] | EMEAI [Member]
Total long-term debt
Total long-term debt	34,743
Equipment Financing [Member] | EMEAI [Member]
Total long-term debt
Total long-term debt	5,165	7,903
Equipment Finance Lease [Member] | U.S. [Member]
Total long-term debt
Total long-term debt	147	288
Equipment Finance Lease [Member] | EMEAI [Member]
Total long-term debt
Total long-term debt	4,488	5,732
Equipment Finance Lease [Member] | Mexico [Member]
Total long-term debt
Total long-term debt	$ 8,975	$ 11,919

Long-Term Debt, Net of Debt I_4

Long-Term Debt, Net of Debt Issuance Costs and Current Maturities - Additional Information (Detail)	1 Months Ended		9 Months Ended
	Oct. 31, 2020USD ($)	Jun. 30, 2020	Sep. 30, 2020USD ($)	Sep. 30, 2020TRY (₺)	Sep. 30, 2020EUR (€)	Feb. 29, 2020USD ($)	Dec. 31, 2019USD ($)	Apr. 30, 2018USD ($)
Senior Revolving Loan [Member] | Revolving Credit Facility [Member] | U.S. [Member]
Debt Instrument [Line Items]
Credit facility, amount						$ 205,000,000		$ 150,000,000
Scheduled maturity date			Apr. 30, 2023
Senior Revolving Loan [Member] | Credit Agreement [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Debt instrument, description of variable rate basis			LIBOR floor of 0.75% plus a margin of 3.0% per annum
Debt instrument, variable rate floor		0.75%
Debt instrument, variable interest rate		3.00%
Senior Revolving Loan [Member] | Credit Agreement Amendment [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Debt instrument, variable rate floor		0.75%
Senior Revolving Loan [Member] | Credit Agreement Amendment [Member] | LIBOR [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt instrument, variable interest rate		1.75%
Senior Revolving Loan [Member] | Credit Agreement Amendment [Member] | LIBOR [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt instrument, variable interest rate		2.50%
Unsecured Financing [Member] | EMEAI [Member] | Turkish Financial Institution [Member] | Fixed Rate of 2.0% [Member]
Debt Instrument [Line Items]
Credit facility, amount			$ 12,800,000	₺ 100,000,000
Debt instrument fixed interest rate			2.00%	2.00%	2.00%
Credit facility outstanding			$ 3,500,000				$ 0
Unsecured Financing [Member] | EMEAI [Member] | Turkish Financial Institution [Member] | Fixed Rate of 2.0% [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Repayments of Debt	$ 3,500,000
Unsecured Financing [Member] | EMEAI [Member] | Turkish Financial Institution [Member] | Fixed Rate of 2.4% [Member]
Debt Instrument [Line Items]
Credit facility, amount			$ 18,000,000
Debt instrument fixed interest rate			2.40%	2.40%	2.40%
Credit facility outstanding			$ 14,700,000
Unsecured Financing [Member] | EMEAI [Member] | Turkish Financial Institution [Member] | Fixed Rate of 5.0% [Member]
Debt Instrument [Line Items]
Credit facility, amount			$ 5,900,000		€ 5,000,000
Debt instrument fixed interest rate			5.00%	5.00%	5.00%
Credit facility outstanding			$ 0
Unsecured Financing [Member] | EMEAI [Member] | Turkish Financial Institution [Member] | Fixed Rate of 3.0% [Member]
Debt Instrument [Line Items]
Credit facility, amount			$ 21,000,000
Debt instrument fixed interest rate			3.00%	3.00%	3.00%
Credit facility outstanding			$ 5,800,000
Unsecured Financing [Member] | EMEAI [Member] | EURIBOR [Member] | Turkish Financial Institution [Member]
Debt Instrument [Line Items]
Credit facility, amount			$ 36,300,000		€ 31,000,000
Debt instrument, description of variable rate basis			one-month Euro Interbank Offered Rate (EURIBOR) plus 1.50%
Debt instrument, variable interest rate			1.50%
Debt instrument fixed interest rate			4.75%	4.75%	4.75%
Debt instrument, description of fixed rate			accrues at a fixed rate of 4.75% and is payable at the end of the term when the loan is repaid
Debt instrument, payment terms			at the end of the term when the loan is repaid
Unsecured Financing [Member] | Revolving Credit Facility [Member] | EMEAI [Member] | EURIBOR [Member] | Turkish Financial Institution [Member]
Debt Instrument [Line Items]
Credit facility, amount			$ 23,400,000		€ 20,000,000
Credit facility outstanding | €					0
Unsecured Financing [Member] | Letters of Credit and Other Non-cash Items [Member] | EMEAI [Member] | EURIBOR [Member] | Turkish Financial Institution [Member]
Debt Instrument [Line Items]
Credit facility, amount			12,900,000		11,000,000
Credit facility outstanding			$ 10,700,000		€ 9,100,000

Share-Based Compensation Plan_2

Share-Based Compensation Plans - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options issued to employees and non-employee directors			261,181
Compensation expense	$ 2,631	$ 1,682	$ 7,947	$ 4,604
Timed-Based Restricted Stock Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation plans, shares issued			461,732
Performance-Based Restricted Stock Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation plans, shares issued			122,752
Performance-Based Restricted Stock Units [Member] | Certain Stock Price Hurdles [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation plans, shares issued			198,826
Modification of Employee and Non-Employee Awards Stock Options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Compensation expense			$ 1,700

Share-Based Compensation Plan_3

Share-Based Compensation Plans - Schedule of Share-based Compensation Expense Recognized in Condensed Consolidated Statements of Operations (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total share-based compensation expense	$ 2,631	$ 1,682	$ 7,947	$ 4,604
Cost of Goods Sold [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total share-based compensation expense	479	(35)	1,115	313
General and Administrative Costs [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total share-based compensation expense	$ 2,152	$ 1,717	$ 6,832	$ 4,291

Share-Based Compensation Plan_4

Share-Based Compensation Plans - Schedule of Share-based Compensation Arrangements by Share-based Payment Award (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total share-based compensation expense	$ 2,631	$ 1,682	$ 7,947	$ 4,604
Restricted Stock Units (RSUs) [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total share-based compensation expense	1,262	869	3,399	2,800
Stock Options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total share-based compensation expense	700	225	2,952	955
Performance-based Restricted Stock Units (PSUs) [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total share-based compensation expense	$ 669	$ 588	$ 1,596	$ 849

Leases - Additional Information

Leases - Additional Information (Detail) - USD ($)	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Lessee Lease Description [Line Items]
Lessee, operating lease, option to extend	include options to extend the leases up to five years
Lessee, operating lease, existence of option to extend [true false]	true
Lessee, finance lease, option to extend	include options to extend the leases up to five years
Lessee, finance lease, existence of option to extend [true false]	true
Lessee, leases not yet commenced, description	As of September 30, 2020, there were no additional leases related to new manufacturing facilities that have not yet commenced.
Lessee, leases not yet commenced, lease liability	$ 0
Assets Under Finance Lease [Member]
Lessee Lease Description [Line Items]
Cost of property plant and equipment leased under finance lease arrangements	42,700,000	$ 45,000,000
Accumulated depreciation of property plant and equipment under finance lease arrangements	$ 20,400,000	$ 17,000,000
Minimum [Member]
Lessee Lease Description [Line Items]
Operating and Finance leases, remaining lease terms	1 year
Maximum [Member]
Lessee Lease Description [Line Items]
Operating and Finance leases, remaining lease terms	15 years
Lessee, lease options to extend lease term	5 years

Leases - Components of Lease Co

Leases - Components of Lease Cost (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Leases [Abstract]
Total operating lease cost	$ 9,546	$ 7,893	$ 27,265	$ 23,830
Finance lease cost
Amortization of assets under finance leases	1,529	1,749	4,489	4,970
Interest on finance leases	240	323	775	1,119
Total finance lease cost	$ 1,769	$ 2,072	$ 5,264	$ 6,089

Leases - Schedule of Lease Liab

Leases - Schedule of Lease Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Leases [Abstract]
Current operating lease liabilities	$ 25,569	$ 16,629
Noncurrent operating lease liabilities	165,551	$ 113,883
Total lease liabilities	191,120
Current maturities of long-term debt	5,855
Long-term debt, net of debt issuance costs and current maturities	7,755
Total lease liabilities	$ 13,610

Leases - Schedule of Future Min

Leases - Schedule of Future Minimum Lease Payments under Noncancelable Leases (Detail) $ in Thousands	Sep. 30, 2020USD ($)
Operating Leases Abstract
Remainder of 2020	$ 8,413
2021	35,295
2022	32,796
2023	31,010
2024	27,787
Thereafter	130,592
Total future minimum lease payments	265,893
Less: interest	(74,773)
Total lease liabilities	191,120
Finance Leases Abstract
Remainder of 2020	1,317
2021	6,544
2022	5,763
2023	865
2024	222
Thereafter	7
Total future minimum lease payments	14,718
Less: interest	(1,108)
Total lease liabilities	$ 13,610

Leases - Other Information Rela

Leases - Other Information Related to Leases (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 22,308	$ 22,977
Operating cash flows from finance leases	775	1,119
Financing cash flows from finance leases	4,592	7,621
Right of use assets obtained in exchange for new lease obligations:
Operating leases	67,705	12,205
Finance leases	$ 131	$ 5,122
Weighted-Average Remaining Lease Term (In Years):
Operating leases	7 years 10 months 24 days		7 years 7 months 6 days
Finance leases	2 years 6 months		3 years 2 months 12 days
Weighted-Average Discount Rate:
Operating leases	7.90%		7.50%
Finance leases	6.40%		6.40%

Financial Instruments - Additio

Financial Instruments - Additional Information (Detail)	1 Months Ended
	Apr. 30, 2018USD ($)	Sep. 30, 2020USD ($)	Sep. 30, 2020MXN ($)	Dec. 31, 2019USD ($)	Dec. 31, 2019MXN ($)
Derivative [Line Items]
Derivative designated for hedge accounting terminated		$ 0
Interest Rate Swap Arrangement [Member]
Derivative [Line Items]
Derivative notional amount	$ 75,000,000
Derivative maturity month and year	2023-04
Interest Rate Swap Arrangement [Member] | LIBOR [Member]
Derivative [Line Items]
Derivative hedges amount future variable rate interest expense	$ 75,000,000
Foreign Exchange Forward Contract [Member] | Cash Flow Hedging [Member]
Derivative [Line Items]
Derivative notional amount		$ 32,200,000	$ 800,000,000	$ 54,800,000	$ 1,100,000,000

Financial Instruments - Fair Va

Financial Instruments - Fair Values and Location of Financial Instruments (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Interest Rate Swap Arrangement [Member] | Other Noncurrent Liabilities [Member]
Derivatives Fair Value [Line Items]
Derivative liability, fair value	$ 4,882	$ 2,723
Foreign Exchange Forward Contract [Member] | Other Current Assets [Member]
Derivatives Fair Value [Line Items]
Foreign exchange forward contracts	$ 1,696	820
Foreign Exchange Forward Contract [Member] | Accounts Payable and Accrued Expenses [Member]
Derivatives Fair Value [Line Items]
Derivative liability, fair value		$ 124

Financial Instruments - Schedul

Financial Instruments - Schedule of Pretax Amounts Reclassified From Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Cost of sales	$ 425,064	$ 335,778	$ 1,141,183	$ 904,135
Foreign Exchange Forward Contract [Member] | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Cost of sales	$ 1,546		$ 4,062

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail)	1 Months Ended
	Jul. 31, 2020
Minimum [Member] | Internal Revenue Service [Member]
Income Tax Disclosure [Line Items]
Effective tax rate, percent	90.00%

Net Income (Loss) Per Common _3

Net Income (Loss) Per Common Share Calculation - Calculation Of Weighted-Average Number Of Common Shares Outstanding (Detail) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Earnings Per Share [Abstract]
Basic weighted-average shares outstanding	35,546	35,131	35,354	35,024
Effect of dilutive awards	1,877	0	0	0
Diluted weighted-average shares outstanding	37,423	35,131	35,354	35,024

Net Income (Loss) Per Common _4

Net Income (Loss) Per Common Share Calculation - Additional Information (Detail) - shares	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Earnings Per Share [Abstract]
Anti-dilutive shares excluded from computation of diluted net income (loss) per share	980,000	1,400,000	1,304,000

Net Income (Loss) Per Common _5

Net Income (Loss) Per Common Share Calculation - Summary of Number of Anti-dilutive Share-based Compensation Awards Excluded from Computation of Net Income (Loss) per Common Share (Detail) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive shares excluded from computation of diluted net income (loss) per share		980,000	1,400,000	1,304,000
Share-Based Compensation Awards [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive shares excluded from computation of diluted net income (loss) per share	1,000	27,000	33,000	14,000

Stockholders' Equity - Schedule

Stockholders' Equity - Schedule of Changes in Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	$ 128,845	$ 191,038	$ 205,050	$ 212,032	$ 213,277	$ 220,957
Other comprehensive income (loss) before reclassifications	853	(540)	(18,709)	(1,851)	(5,558)	(958)
Amounts reclassified from AOCL	1,546	2,738	(222)
Net tax effect	(1,100)	(938)	2,038	202	284	481
Net current period other comprehensive income (loss)	1,299	1,260	(16,893)	(1,649)	(5,274)	(477)
Ending balance	181,452	128,845	191,038	206,165	212,032	213,277
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	(33,525)	(31,235)	(22,012)	(17,856)	(13,653)	(14,986)
Other comprehensive income (loss) before reclassifications	(1,662)	(2,290)	(9,223)	(895)	(4,203)	1,333
Net current period other comprehensive income (loss)	(1,662)	(2,290)	(9,223)	(895)	(4,203)	1,333
Ending balance	(35,187)	(33,525)	(31,235)	(18,751)	(17,856)	(13,653)
Interest Rate Swap [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	(4,160)	(4,160)	(2,145)	(2,287)	(1,216)	594
Other comprehensive income (loss) before reclassifications	391		(2,550)	(395)	(1,355)	(2,291)
Net tax effect	(535)		535	84	284	481
Net current period other comprehensive income (loss)	(144)		(2,015)	(311)	(1,071)	(1,810)
Ending balance	(4,304)	(4,160)	(4,160)	(2,598)	(2,287)	(1,216)
Foreign Exchange Forward Contract [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	(1,560)	(5,110)	545
Other comprehensive income (loss) before reclassifications	2,124	1,750	(6,936)	(561)
Amounts reclassified from AOCL	1,546	2,738	(222)
Net tax effect	(565)	(938)	1,503	118
Net current period other comprehensive income (loss)	3,105	3,550	(5,655)	(443)
Ending balance	1,545	(1,560)	(5,110)	(443)
Accumulated Other Comprehensive Loss [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	(39,245)	(40,505)	(23,612)	(20,143)	(14,869)	(14,392)
Net current period other comprehensive income (loss)	1,299	1,260	(16,893)	(1,649)	(5,274)	(477)
Ending balance	$ (37,946)	$ (39,245)	$ (40,505)	$ (21,792)	$ (20,143)	$ (14,869)

Concentration of Customers - Ad

Concentration of Customers - Additional Information (Detail) - Customer Concentration Risk [Member] - Minimum [Member]	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Sales Revenues [Member]
Concentration Risk [Line Items]
Customer risk percentage	10.00%	10.00%	10.00%	10.00%
Accounts Receivable [Member]
Concentration Risk [Line Items]
Customer risk percentage			10.00%		10.00%

Concentration of Customers - Sc

Concentration of Customers - Schedule of Revenues from Customers (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Concentration Risk [Line Items]
Revenues	$ 474,113	$ 383,836	$ 1,204,566	$ 1,014,387
Sales Revenues [Member] | Vestas [Member] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Revenues	$ 240,710	$ 176,018	$ 591,548	$ 446,733
Percentage of Total	50.80%	45.90%	49.10%	44.00%
Sales Revenues [Member] | GE [Member] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Revenues	$ 124,523	$ 96,312	$ 295,831	$ 272,859
Percentage of Total	26.30%	25.10%	24.60%	26.90%
Sales Revenues [Member] | Nordex [Member] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Revenues	$ 53,182	$ 61,514	$ 168,697	$ 170,044
Percentage of Total	11.20%	16.00%	14.00%	16.80%

Concentration of Customers - _2

Concentration of Customers - Schedule of Trade Accounts Receivable from Certain Customers (Detail) - Accounts Receivable [Member] - Customer Concentration Risk [Member]	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Vestas [Member]
Concentration Risk [Line Items]
Percentage of Total	41.30%	41.90%
Nordex [Member]
Concentration Risk [Line Items]
Percentage of Total	32.40%	31.30%

Segment Reporting - Additional

Segment Reporting - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2020Segment
Segment Reporting [Abstract]
Number of operating segments	4
Number of reportable segments	4

Segment Reporting - Schedule of

Segment Reporting - Schedule of Segment Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Segment Reporting Information [Line Items]
Total revenues	$ 474,113	$ 383,836	$ 1,204,566	$ 1,014,387
Total income from operations	29,005	12,118	346	4,959
Total property, plant and equipment, net	210,024		210,024		$ 205,007
U.S. Segment [Member]
Segment Reporting Information [Line Items]
Total revenues	46,799	40,643	136,309	122,129
Total income from operations	(6,360)	(17,510)	(33,991)	(54,235)
Total property, plant and equipment, net	32,088		32,088		36,410
Asia Segment [Member]
Segment Reporting Information [Line Items]
Total revenues	163,458	108,114	400,513	261,531
Total income from operations	25,779	13,448	49,343	4,779
Total property, plant and equipment, net	48,276		48,276		50,603
Mexico Segment [Member]
Segment Reporting Information [Line Items]
Total revenues	161,563	117,690	363,233	297,717
Total income from operations	11,986	(4,954)	(1,106)	(1,258)
Total property, plant and equipment, net	80,601		80,601		81,654
EMEAI Segment [Member]
Segment Reporting Information [Line Items]
Total revenues	102,293	117,389	304,511	333,010
Total income from operations	(2,400)	21,134	(13,900)	55,673
Total property, plant and equipment, net	49,059		49,059		$ 36,340
U.S. [Member]
Segment Reporting Information [Line Items]
Total revenues	46,799	40,643	136,309	122,129
China [Member]
Segment Reporting Information [Line Items]
Total revenues	163,458	108,114	400,513	261,531
Mexico [Member]
Segment Reporting Information [Line Items]
Total revenues	161,563	117,690	363,233	297,717
Turkey and India [Member]
Segment Reporting Information [Line Items]
Total revenues	$ 102,293	$ 117,389	$ 304,511	$ 333,010

Segment Reporting - Schedule _2

Segment Reporting - Schedule of Segment Information (Parenthetical) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting Information [Line Items]
General and administrative costs	$ 9,263	$ 10,608	$ 25,646	$ 27,801
U.S. Segment [Member]
Segment Reporting Information [Line Items]
General and administrative costs	$ 9,300	$ 10,600	$ 25,600	$ 27,800