Valmont Industries (VMI) 10-K 1 Mar 23 2022 FY Annual report Financial data

Cover Page

Cover Page - USD ($)	12 Months Ended
	Dec. 31, 2022	Feb. 23, 2023	Jun. 25, 2022
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2022
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	1-31429
Entity Registrant Name	Valmont Industries, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	47-0351813
Entity Address, Address Line One	15000 Valmont Plaza,
Entity Address, City or Town	Omaha
Entity Address, State or Province	NE
Entity Address, Postal Zip Code	68154
City Area Code	402
Local Phone Number	963-1000
Title of 12(b) Security	Common Stock $1.00 par value
Trading Symbol	VMI
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Smaller Reporting Company	false
Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Shell Company	false
Entity Common Stock, Shares Outstanding		21,350,005
Entity Public Float			$ 4,753,258,488
Documents Incorporated by Reference	Portions of the Company’s proxy statement for its annual meeting of shareholders to be held on April 24, 2023 (the “Proxy Statement”), to be filed within 120 days of the fiscal year ended December 31, 2022, are incorporated by reference in Part III.
Entity Central Index Key	0000102729
Amendment Flag	false
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	FY
Auditor Location	Omaha, Nebraska
Auditor Name	DELOITTE & TOUCHE LLP
Auditor Firm ID	34

CONSOLIDATED STATEMENTS OF EARN

CONSOLIDATED STATEMENTS OF EARNINGS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 25, 2021	Dec. 26, 2020
Net sales	$ 4,345,250	$ 3,501,575	$ 2,895,355
Total cost of sales	3,219,026	2,617,686	2,129,841
Gross profit	1,126,224	883,889	765,514
Selling, general, and administrative expenses	692,975	590,608	522,923
Impairment of goodwill and intangible assets		6,496	16,638
Operating income	433,249	286,785	225,953
Other income (expenses):
Interest expense	(47,534)	(42,612)	(41,075)
Interest income	2,015	1,192	2,374
Gain (loss) on investments - unrealized	(3,374)	1,920	2,443
Loss from divestiture of offshore wind energy structures business	(33,273)
Other	12,805	12,798	3,073
Total other income (expenses)	(69,361)	(26,702)	(33,185)
Earnings before income taxes	363,888	260,083	192,768
Income tax expense:
Current	109,912	61,343	51,012
Deferred	(1,225)	71	(1,397)
Total income tax expense (benefit)	108,687	61,414	49,615
Earnings before equity in earnings of nonconsolidated subsidiaries	255,201	198,669	143,153
Equity in loss of nonconsolidated subsidiaries	(950)	(944)	(1,004)
Net earnings	254,251	197,725	142,149
Less: Earnings attributable to noncontrolling interests	(3,388)	(2,095)	(1,456)
Net earnings attributable to Valmont Industries, Inc.	$ 250,863	$ 195,630	$ 140,693
Earnings per share:
Basic	$ 11.77	$ 9.23	$ 6.60
Diluted	$ 11.62	$ 9.10	$ 6.57
Product sales
Net sales	$ 3,955,320	$ 3,159,605	$ 2,594,855
Total cost of sales	2,958,208	2,395,630	1,936,024
Services sales
Net sales	389,930	341,970	300,500
Total cost of sales	$ 260,818	$ 222,056	$ 193,817

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 25, 2021	Dec. 26, 2020
Statement of Comprehensive Income [Abstract]
Net earnings	$ 254,251	$ 197,725	$ 142,149
Foreign currency translation adjustments:
Unrealized translation gains (losses)	(44,741)	(31,405)	21,483
Realized loss on offshore wind energy structures business recorded in other expense	25,977
Foreign currency translation adjustments	(18,764)	(31,405)	21,483
Gain (loss) on hedging activities:
Commodity hedges	(2,352)	20,019
Realized (gain) loss on commodity hedges recorded in earnings	5,212	(25,821)
Unrealized gain (loss) on cross currency swaps	5,146	6,093	(5,751)
Unrealized gain on net investment hedges, net of tax expense of $2,428 in 2020			7,289
Realized (gain) on offshore wind energy structures business cross currency swap, net of tax expense of $1,207 in 2022	(3,620)
Cash flow hedges			1,598
Realized gain on cash flow hedges recorded in earnings			(1,598)
Amortization cost included in interest expense	(64)	(64)	(64)
Gain (loss) on hedging activities	4,322	227	1,474
Net gain (loss) on defined benefit pension plan, net of tax expense (benefit) of $(606) in 2022, $25,736 in 2021, $(4,183) in 2020	1,345	76,718	(17,349)
Other comprehensive income (loss)	(13,097)	45,540	5,608
Comprehensive income	241,154	243,265	147,757
Comprehensive income attributable to noncontrolling interests	(2,073)	(976)	(3,428)
Comprehensive income attributable to Valmont Industries, Inc.	$ 239,081	$ 242,289	$ 144,329

CONSOLIDATED STATEMENTS OF CO_2

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 25, 2021	Dec. 26, 2020
Statement of Comprehensive Income [Abstract]
Unrealized gain on net investment hedges, net of tax expense (benefit) of $--- in 2022, $--- in 2021, $2,428 in 2019			$ 2,428
Realized (gain) on offshore wind energy structures business cross currency swap, tax expense	$ 1,207
Actuarial gain (loss) on defined benefit pension plan, net of tax expense (benefit) of $--- in 2022, $25,736 in 2021, $(4,183) in 2020	$ (606)	$ 25,736	$ (4,183)

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 25, 2021
Current assets:
Cash and cash equivalents	$ 185,406	$ 177,232
Receivables, less allowance of $20,890 in 2022 and $18,050 in 2021	604,181	571,593
Inventories	728,762	728,834
Contract assets	174,539	142,643
Prepaid expenses and other assets	87,697	83,646
Refundable income taxes		8,815
Total current assets	1,780,585	1,712,763
Property, plant, and equipment, at cost	1,433,151	1,422,101
Less accumulated depreciation and amortization	837,573	823,496
Net property, plant and equipment	595,578	598,605
Goodwill	739,861	708,566
Other intangible assets, net	176,615	175,364
Defined pension benefit asset	24,216
Other assets	240,141	251,951
Total assets	3,556,996	3,447,249
Current liabilities:
Current installments of long-term debt	1,194	4,884
Notes payable to banks	5,846	13,439
Accounts payable	360,312	347,841
Accrued employee compensation and benefits	124,355	144,559
Contract liabilities	172,915	135,746
Other accrued expenses	123,965	108,771
Income taxes payable	3,664
Dividends payable	11,742	10,616
Total current liabilities	803,993	765,856
Deferred income taxes	41,091	47,849
Long-term debt, excluding current installments	870,935	947,072
Operating lease liabilities	155,469	147,759
Deferred compensation	30,316	35,373
Other noncurrent liabilities	13,480	89,743
Shareholders' equity:
Authorized 75,000,000 shares; 27,900,000 issued	27,900	27,900
Additional paid-in capital		1,479
Retained earnings	2,593,039	2,394,307
Accumulated other comprehensive loss	(274,909)	(263,127)
Cost of treasury stock, common shares of 6,549,833 in 2022 and 6,619,860 in 2021	(765,183)	(773,712)
Total Valmont Industries, Inc. shareholders' equity	1,580,847	1,386,847
Noncontrolling interest in consolidated subsidiaries	60,865	26,750
Total shareholders' equity	1,641,712	1,413,597
Total liabilities and shareholders' equity	$ 3,556,996	$ 3,447,249

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 25, 2021
Statement of Financial Position [Abstract]
Receivables, less allowance	$ 20,890	$ 18,050
Common stock of $1 par value -	$ 1	$ 1
Common stock, authorized shares (in shares)	75,000,000	75,000,000
Common stock, issued shares (in shares)	27,900,000	27,900,000
Common shares in treasury, shares	6,549,833	6,619,860

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended			103 Months Ended
	Dec. 31, 2022	Dec. 25, 2021	Dec. 26, 2020	Dec. 31, 2022
Cash flows from operating activities:
Net earnings	$ 254,251	$ 197,725	$ 142,149
Adjustments to reconcile net earnings to net cash flows from operations:
Depreciation and amortization	97,167	92,577	82,892
Noncash loss on trading securities			39
Contribution to defined benefit pension plan	(17,155)	(1,924)	(35,399)
Loss from divestiture of offshore wind energy structures business	33,273
Impairment of long-lived assets		27,911	20,389
Stock-based compensation	41,850	28,720	14,874
Defined benefit pension plan benefit	(10,087)	(14,567)	(7,311)
Loss (gain) on sale of property, plant and equipment	237	(961)	60
Equity in loss in nonconsolidated subsidiaries	950	944	1,004
Deferred income taxes	(1,225)	71	(1,397)
Changes in assets and liabilities:
Receivables	(74,163)	(69,275)	(24,403)
Inventories	(3,429)	(289,942)	(21,888)
Prepaid expenses and other assets (current and non-current)	26,625	(36,066)	(10,633)
Contract assets	(53,008)	(21,579)	19,835
Accounts payable	36,990	89,418	33,044
Accrued expenses	624	30,556	52,548
Contract liabilities	(567)	6,589	12,072
Other noncurrent liabilities	(16,904)	20,181	46,712
Income taxes payable / refundable	10,836	5,560	(8,293)
Net cash flows from operating activities	326,265	65,938	316,294
Cash flows from investing activities:
Purchase of property, plant, and equipment	(93,288)	(107,790)	(106,700)
Proceeds from sale of assets	1,582	1,745	10,860
Acquisitions, net of cash acquired	(39,287)	(312,500)	(15,862)
Proceeds from settlement of net investment hedge			11,983
Investments in nonconsolidated subsidiaries			(1,283)
Other, net	(1,087)	1,237	(3,027)
Net cash flows from investing activities	(132,080)	(417,308)	(104,029)
Cash flows from financing activities:
Proceeds from short-term borrowings	9,665	5,821	20,990
Payments on short-term borrowings	(17,242)	(26,062)	(7,946)
Proceeds from long-term borrowings	253,999	312,485	88,872
Principal payments on long-term borrowings	(336,403)	(91,313)	(121,665)
Proceeds from settlement of financial derivatives	3,532
Debt issuance costs		(2,267)
Dividends paid	(45,813)	(41,412)	(36,930)
Dividends to noncontrolling interest	(714)		(5,642)
Purchase of noncontrolling interests	(7,338)		(59,416)
Purchase of treasury shares	(40,474)	(26,100)	(56,491)	$ (918,600)
Proceeds from exercises under stock plans	16,849	23,895	18,961
Purchase of common treasury shares-stock plan exercises	(17,966)	(21,547)	(14,489)
Net cash flows from financing activities	(181,905)	133,500	(173,756)
Effect of exchange rate changes on cash and cash equivalents	(4,106)	(5,624)	8,675
Net change in cash and cash equivalents	8,174	(223,494)	47,184
Cash and cash equivalents-beginning of year	177,232	400,726	353,542
Cash and cash equivalents-end of period	$ 185,406	$ 177,232	$ 400,726	$ 185,406

CONSOLIDATED STATEMENTS OF SHAR

CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Common stock	Additional paid-in capital	Retained earnings	Accumulated other comprehensive income (loss)	Treasury stock	Noncontrolling interest in consolidated subsidiaries	Total
Beginning balance at Dec. 28, 2019	$ 27,900	$ 0	$ 2,173,802	$ (313,422)	$ (743,942)	$ 45,407	$ 1,189,745
Increase (Decrease) in Shareholders' Equity
Net earnings			140,693			1,456	142,149
Other comprehensive income (loss)				3,636		1,972	5,608
Cash dividends declared			(38,393)				(38,393)
Dividends to noncontrolling interests						(5,642)	(5,642)
Addition of noncontrolling interest						5,125	5,125
Purchase of noncontrolling interest			(31,067)			(22,544)	(53,611)
Purchase of treasury shares					(56,491)		(56,491)
Stock plan exercises					(14,489)		(14,489)
Stock options exercised		(6,335)			25,296		18,961
Stock option expense		2,628					2,628
Stock awards		4,042			8,204		12,246
Ending balance at Dec. 26, 2020	27,900	335	2,245,035	(309,786)	(781,422)	25,774	1,207,836
Increase (Decrease) in Shareholders' Equity
Net earnings			195,630			2,095	197,725
Other comprehensive income (loss)				46,659		(1,119)	45,540
Cash dividends declared			(42,472)				(42,472)
Purchase of treasury shares					(26,100)		(26,100)
Stock plan exercises					(21,547)		(21,547)
Stock options exercised		(15,357)	(3,886)		43,138		23,895
Stock option expense		2,538					2,538
Stock awards		13,963			12,219		26,182
Ending balance at Dec. 25, 2021	27,900	1,479	2,394,307	(263,127)	(773,712)	26,750	1,413,597
Increase (Decrease) in Shareholders' Equity
Net earnings			250,863			3,388	254,251
Other comprehensive income (loss)				(11,782)		(1,315)	(13,097)
Cash dividends declared			(46,939)				(46,939)
Dividends to noncontrolling interests						(714)	(714)
Addition of noncontrolling interest						41,693	41,693
Purchase of treasury shares					(40,474)		(40,474)
Reduction of noncontrolling interest		1,599				(8,937)	(7,338)
Stock plan exercises					(17,966)		(17,966)
Stock options exercised		(17,754)	(5,192)		39,795		16,849
Stock option expense		3,120					3,120
Stock awards		$ 11,556			27,174		38,730
Ending balance at Dec. 31, 2022	$ 27,900		$ 2,593,039	$ (274,909)	$ (765,183)	$ 60,865	$ 1,641,712

CONSOLIDATED STATEMENTS OF SH_2

CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 25, 2021	Dec. 26, 2020
Statement of Stockholders' Equity [Abstract]
Cash dividends per share (in dollars per share)	$ 2.20	$ 2	$ 1.80
Purchase of treasury shares acquired (in shares)	137,612	111,833	441,119
Stock plan exercises; shares acquired (in shares)	60,599	90,292	88,411
Stock options exercised; shares issued (in shares)	121,163	169,908	147,014
Stock awards; shares issued (in shares)	147,075	88,395	65,248

SUMMARY OF SIGNIFICANT ACCOUNTI

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	12 Months Ended
	Dec. 31, 2022
Accounting Policies [Abstract]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	(1) SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Principles of Consolidation The consolidated financial statements include the accounts of Valmont Industries, Inc. and its wholly and majority‑owned subsidiaries (the “Company”). Investments in 20% to 50% owned affiliates and joint ventures are accounted for by the equity method. Investments in less than 20% owned affiliates are accounted for by the cost method. All intercompany items have been eliminated. Cash Overdrafts Cash book overdrafts totaling $25,075 and $19,670 were classified as accounts payable at December 31, 2022 and December 25, 2021, respectively. The Company’s policy is to report the change in book overdrafts as an operating activity in the Consolidated Statements of Cash Flows. Change in Reportable Segments During the first quarter of 2022, the Company’s Chief Executive Officer, as the chief operating decision maker, made changes to the Company’s management structure and began to manage the business, allocate resources, and evaluate performance under the new structure. As a result, the Company has realigned its reportable segment structure. All prior period segment information has been recast to reflect this change in reportable segments. Refer to Note 21 for additional information. The Company has two reportable segments based on its management structure. Each segment is global in nature with a manager responsible for segment operational performance and allocation of capital within the segment. Reportable segments are as follows: INFRASTRUCTURE: This segment consists of the manufacture and distribution of products and solutions to serve the infrastructure markets of utility, renewable energy, lighting, transportation, and telecommunications, and coatings services to preserve metal products. AGRICULTURE: This segment consists of the manufacture of center pivot components and linear irrigation equipment for agricultural markets, including parts and tubular products, and advanced technology solutions for precision agriculture. In addition to these two reportable segments, the Company had a business and related activities that was not more than 10% of consolidated sales, operating income, or assets. This includes the offshore wind energy structures business and is reported in the “Other” segment until its divestiture in 2022. Fiscal Year The Company operates on a 52 or 53 week fiscal year with each year ending on the last Saturday in December. Accordingly, the Company’s fiscal year ended December 31, 2022 consisted of 53 weeks and the Company’s fiscal years ended December 25, 2021 and December 26, 2020 consisted of 52 weeks. The estimated impact on the Company's results of operations due to the extra week in fiscal year 2022 was additional net sales of approximately $80,800 and additional net earnings of approximately $5,300. Accounts Receivable Accounts receivable are reported on the balance sheet net of any allowance for doubtful accounts. Allowances are maintained in amounts considered to be appropriate in relation to the outstanding receivables based on age of the receivable, economic conditions and customer credit quality. As the Company’s international business has grown, the exposure to potential losses in international markets has also increased. These exposures can be difficult to estimate, particularly in areas of political instability, with governments with which the Company has limited experience, or where there is a lack of transparency as to the current credit condition of governmental units. ​ (1) SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES – CONTINUED The following table details the balances of the allowance for doubtful receivables and changes therein: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance at Charged to Currency Deductions Balance at ​ ​ Beginning of ​ Profit and ​ Translation ​ from ​ Close of For periods ended: ​ Period ​ Loss ​ Adjustment ​ Reserves ​ Period December 31, 2022 ​ $ 18,050 ​ $ 4,237 ​ $ (522) ​ $ (875) ​ $ 20,890 December 25, 2021 ​ 15,952 ​ 3,379 ​ (339) ​ (942) ​ 18,050 December 26, 2020 ​ 9,548 ​ 7,957 ​ 260 ​ (1,813) ​ 15,952 ​ The Company sells trade accounts receivable at a discount under uncommitted trade accounts receivable sale programs to third party financial institutions without recourse. As these accounts receivable are sold without recourse, the Company does not retain the associated risks following the transfer of such accounts receivable to the financial institutions. Transfers of accounts receivable are accounted for as sales and, accordingly, accounts receivables sold are excluded from “Receivables, less allowance” on the Consolidated Balance Sheets and cash proceeds are reflected in “Cash flows from operating activities” on the Consolidated Statements of Cash Flows. The difference between the carrying amount of the trade accounts receivables sold and the cash received, or discount, is recorded in “Other” expenses on the Consolidated Statements of Earnings. At December 31, 2022 and December 25, 2021, the Company sold trade accounts receivable of $100.0 million and $25.4 million, respectively. The fees associated with trade accounts receivables sold are immaterial. Inventories Inventory is valued at the lower of cost, determined on the first-in, first-out (“FIFO”) method, or net realizable value. Finished goods and manufactured goods inventories include the costs of acquired raw materials and related factory labor and overhead charges required to convert raw materials to manufactured and finished goods. Long-Lived Assets Property, plant, and equipment are recorded at historical cost. The Company generally uses the straight-line method in computing depreciation and amortization for financial reporting purposes and accelerated methods for income tax purposes. The annual provisions for depreciation and amortization have been computed principally in accordance with the following ranges of asset lives: buildings and improvements 15 to 40 years, machinery and equipment 3 to 12 years, transportation equipment 3 to 24 years, office furniture and equipment 3 to 7 years, and intangible assets 5 to 20 years. Depreciation expense in fiscal 2022, 2021, and 2020 was $73,938, $70,223, and $63,890, respectively. An impairment loss is recognized if the carrying amount of an asset may not be recoverable and exceeds estimated future undiscounted cash flows of the asset. A recognized impairment loss reduces the carrying amount of the asset to its estimated fair value. The Company recognized a pre-tax $27,900 impairment of long-lived assets (property, plant, and equipment, customer relationship intangible asset, and trade name) in 2021 when it determined that its offshore wind energy business reporting unit would not generate sufficient cash flows to recover the carrying values. An impairment test was required in November 2021 when the Company received clarifying information on the competitive environment of this reporting unit in Europe. Impairment losses were recorded in 2020 as facilities were closed and future plans for certain fixed assets changed in connection with the Company’s restructuring plans. The Company evaluates its reporting units for impairment of goodwill during the third fiscal quarter of each year, or when events or changes in circumstances indicate the carrying value may not be recoverable. Reporting units are evaluated using after-tax operating cash flows (less capital expenditures) discounted to present value (“discounted cash flows”). For the solar tracking reporting unit, the Company valued this reporting unit using a blend of the discounted cash flows and multiple of earnings before interest, taxes, depreciation, and amortization (“EBITDA”) approach. Indefinite‑lived intangible assets are assessed separately from goodwill as part of the annual impairment testing, using a relief-from-royalty method. If the underlying assumptions related to the valuation of a reporting unit’s goodwill or an indefinite‑lived intangible asset change materially before or after the annual impairment testing, the reporting unit or asset is evaluated for potential impairment. In these evaluations, management considers recent operating performance, expected future performance, industry conditions, and other indicators of potential impairment. See footnote 8 for details of impairments recognized during 2021. (1) SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES – CONTINUED Leases The Company's operating leases are included in “Other assets” and “Operating lease liabilities” in the Consolidated Balance Sheets. Income Taxes The Company uses the asset and liability method to calculate deferred income taxes. Deferred tax assets and liabilities are recognized on temporary differences between financial statement and tax bases of assets and liabilities using enacted tax rates. The effect of tax rate changes on deferred tax assets and liabilities is recognized in income during the period that includes the enactment date. Warranties The Company’s provision for product warranty reflects management’s best estimate of probable liability under its product warranties. Estimated future warranty costs are recorded at the time a sale is recognized. Future warranty liability is determined based on applying historical claim rate experience to units sold that are still within the warranty period. In addition, the Company records provisions for known warranty claims. Pension Benefits Certain expenses are incurred in connection with a defined benefit pension plan. In order to measure expense and the related benefit obligation, various assumptions are made including discount rates used to value the obligation, expected return on plan assets used to fund these expenses, and estimated future inflation rates. These assumptions are based on historical experience as well as current facts and circumstances. An actuarial analysis is used to measure the expense and liability associated with pension benefits. Stock Plans The Company maintains stock-based compensation plans approved by the shareholders, which provide that the Human Resource Committee of the Board of Directors may grant incentive stock options, nonqualified stock options, stock appreciation rights, restricted stock awards, restricted stock units, and bonuses of common stock. Fair Value The Company applies the provisions of Accounting Standards Codification 820, Fair Value Measurement Derivative Instruments The Company may enter into derivative financial instruments to manage risk associated with fluctuation in interest rates, foreign currency rates, or commodities. Where applicable, the Company may elect to account for such derivatives as either a cash flow, fair value, or net investment hedge. (1) SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES – CONTINUED Comprehensive Income (Loss) Comprehensive income (loss) includes net earnings, currency translation adjustments, certain derivative-related activity, and changes in net actuarial gains / losses from a pension plan. Results of operations for foreign subsidiaries are translated using the average exchange rates during the period. Assets and liabilities are translated at the exchange rates in effect on the balance sheet dates. The components of accumulated other comprehensive income (loss) consisted of the following: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Foreign ​ ​ ​ ​ Accumulated ​ ​ Currency ​ ​ ​ Defined ​ Other ​ ​ Translation ​ Hedging ​ Benefit ​ Comprehensive ​ ​ Adjustments ​ Activities ​ Pension Plan ​ Income (Loss) Balance at December 25, 2021 ​ $ (243,350) ​ $ 15,777 ​ $ (35,554) ​ $ (263,127) Current period comprehensive income (loss) ​ (43,426) ​ 7,942 ​ 1,345 ​ (34,139) Divestiture of offshore wind energy structures business ​ ​ 25,977 ​ ​ (3,620) ​ ​ — ​ ​ 22,357 Balance at December 31, 2022 ​ $ (260,799) ​ $ 20,099 ​ $ (34,209) ​ $ (274,909) ​ Revenue Recognition The Company determines the appropriate revenue recognition for contracts by analyzing the type, terms, and conditions of each contract or arrangement with a customer. Contracts with customers for all businesses are fixed-price with sales tax excluded from revenue and do not include variable consideration. Discounts included in contracts with customers, typically early pay discounts, are recorded as a reduction of net sales in the period in which the sale is recognized. Contract revenues are classified as product sales when the performance obligation is related to the manufacturing of goods. Contract revenues are classified as service sales when the performance obligation is the performance of a service. Service revenue is primarily related to the Coatings and Technology Products and Services product lines. Customer acceptance provisions exist primarily in the design stage of products (on a limited basis, the Company may agree to other acceptance terms), and acceptance of the design by the customer is required before the project is manufactured and delivered to the customer. The Company is not entitled to any compensation solely based on design of the product and does not recognize this service as a separate performance obligation and, therefore, no revenue is recognized with the design stage. No general rights of return exist for customers once the product has been delivered and the Company establishes provisions for estimated warranties. The Company does not sell extended warranties for any of its products. Shipping and handling costs associated with sales are recorded as costs of goods sold. The Company elected to use the practical expedient of treating freight as a fulfillment obligation instead of a separate performance obligation and ratably recognize freight expense as the structure is being manufactured, when the revenue from the associated customer contract is being recognized over time. With the exception of the transmission, distribution, and substation structures ("TD&S") product line, the renewable energy product line, and the telecommunication structures product line, the Company’s inventory is interchangeable for a variety of each segment’s customers. The Company has elected to not disclose the partially satisfied performance obligation at the end of the period when the contract has an original expected duration of one year or less. In addition, the Company does not adjust the amount of consideration to be received in a contract for any significant financing component if payment is expected within twelve months of transfer of control of goods or services. The Company’s contract assets as of December 31, 2022 and December 25, 2021 totaled $174,539 and $142,643, respectively. While most of the Infrastructure segment customers are generally invoiced upon shipment or delivery of the goods to the customer’s specified location, certain customers are also invoiced by advanced billings or progress billings. At December 31, 2022 and December 25, 2021, total contract liabilities were $178,531 and $213,203, respectively. At December 31, 2022, $172,915 was recorded as contract liabilities and $5,616 was recorded as other noncurrent liabilities on the consolidated balance sheets. Additional details are as follows: ​ (1) SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES – CONTINUED ● During the fiscal year ended December 31, 2022 and December 25, 2021, the Company recognized $96,373 and $105,406 of revenue that was included in the total contract liability as of December 25, 2021 and December 26, 2020, respectively. The revenue recognized was due to applying advance payments received for performance obligations completed during the period. ● At December 31, 2022, the Company had $11,080 of remaining performance obligations on contracts with an original expected duration of one year or more and expects to complete the remaining performance obligations on these contracts within the next 12 to 24 months . Segment and Product Line Revenue Recognition Infrastructure Segment Steel and concrete utility structures within the TD&S product lines are engineered to customer specifications resulting in limited ability to sell the structure to a different customer if an order is canceled after production commences. The continuous transfer of control to the customer is evidenced either by contractual termination clauses or by rights to payment for work performed to-date plus a reasonable profit as the products do not have an alternative use to the Company. Since control is transferring over time, revenue is recognized based on the extent of progress towards completion of the performance obligation. The selection of the method to measure progress towards completion requires judgment. For the TD&S and telecommunication structure product lines, the Company generally recognizes revenue on an inputs basis, using total production hours incurred to-date for each order as a percentage of total hours estimated to produce the order. The completion percentage is applied to the order’s total revenue and total estimated costs to determine reported revenue, cost of goods sold, and gross profit. Production of an order, once started, is typically completed within three months. Depending on the product sold, revenue from renewable energy is recognized both upon shipment or delivery of goods to the customer depending on contract terms, or by using an inputs method, based on the ratio of costs incurred to-date to the total estimated costs at completion of the performance obligation. External sales agents are used in certain TD&S sales and the Company has chosen to expense estimated commissions owed to third parties by recognizing them proportionately as the goods are manufactured. For the structures sold for lighting and transportation and for the majority of telecommunication products, revenue is recognized upon shipment or delivery of goods to the customer depending on contract terms, which is the same point in time that the customer is billed. There are also large regional customers who have unique product specifications for telecommunication structures. When the customer contract includes a cancellation clause that would require them to pay for work completed plus a reasonable margin if an order was canceled, revenue is recognized over time based on hours worked as a percent of total estimated hours to complete production. The Coatings product line revenues are derived by providing coating services to customers’ products, which include galvanizing, anodizing, and powder coating. Revenue is recognized once the coating service has been performed and the goods are ready to be picked up or delivered to the customer which is the same time that the customer is billed. Agriculture Segment Revenue recognition from the manufacture of irrigation equipment and related parts and services (including tubular products for industrial customers) is generally upon shipment of the goods to the customer which is the same point in time that the customer is billed. The remote monitoring subscription services recognized as part of technology services product line are primarily billed annually and revenue is recognized on a straight-line basis over the subsequent twelve months (contract terms). (1) SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES – CONTINUED Disaggregation of revenue by product line is disclosed in the “Business Segments” footnote. A breakdown by segment of revenue recognized over time and revenue recognized at a point in time for the fiscal years ended December 31, 2022 and December 25, 2021 is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fiscal Year 2022 ​ Fiscal Year 2021 ​ Fiscal Year 2020 ​ ​ Point in ​ Over ​ Point in ​ Over ​ Point in ​ Over ​ Time Time Time Time Time Time Infrastructure ​ $ 1,687,458 ​ $ 1,222,288 ​ $ 1,388,297 ​ $ 973,227 ​ $ 1,296,497 ​ $ 838,703 Agriculture ​ 1,307,681 ​ 27,604 ​ 996,278 ​ 20,772 ​ 624,831 ​ 15,261 Other ​ ​ — ​ ​ 100,219 ​ ​ — ​ ​ 123,001 ​ ​ — ​ ​ 120,063 Total ​ $ 2,995,139 ​ $ 1,350,111 ​ $ 2,384,575 ​ $ 1,117,000 ​ $ 1,921,328 ​ $ 974,027 ​ Use of Estimates Management of the Company has made a number of estimates and assumptions relating to the reporting of assets and liabilities, the reported amounts of revenue and expenses, and the disclosure of contingent assets and liabilities to prepare these financial statements in conformity with generally accepted accounting principles. Actual results could differ from those estimates. Equity Method Investments The Company has equity method investments in non-consolidated subsidiaries which are recorded within “Other assets” on the Consolidated Balance Sheets. Treasury Stock Repurchased shares are recorded as “Cost of treasury stock” and result in a reduction of “Shareholders’ equity.” When treasury shares are reissued, the Company uses the last-in, first-out method, and the difference between the repurchase cost and re-issuance price is charged or credited to “Additional paid-in capital”. In May 2014, the Company announced a capital allocation philosophy which covered a share repurchase program. Specifically, the Board of Directors at that time authorized the purchase of up to $500,000 of the Company’s outstanding common stock from time to time over twelve months at prevailing market prices, through open market or privately-negotiated transactions. In February 2015 and again in October 2018, the Board of Directors authorized an additional purchase of up to $250,000 of the Company’s outstanding common stock with no stated expiration date. As of December 31, 2022, the Company has acquired 6,613,018 shares for approximately $918,600 under this share repurchase program. Subsequent to year end, on February 27, 2023, the Board of Directors increased the amount remaining under the program by an additional $400,000, with no stated expiration date. Research and Development Research and development costs are charged to operations in the year incurred. These costs are a component of “Selling, general, and administrative expenses” on the Consolidated Statements of Earnings. Research and development expenses were approximately $46,000 in 2022, $37,000 in 2021, and $21,400 in 2020. Recently Adopted Accounting Pronouncements In March 2020, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update No. 2020-04 (ASU 2020-04), Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting Reference Rate Reform (Topic 848): Deferral of the Sunset Date of Topic 848 ​ (1) SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES – CONTINUED Recently Issued Accounting Pronouncements (Not Yet Adopted) In September 2022, the FASB issued Accounting Standards Update No. 2022-04 (ASU 2022-04), Liabilities - Supplier Finance Programs (Topic 450-50): Disclosure of Supplier Finance Program Obligations

ACQUISITIONS

ACQUISITIONS	12 Months Ended
	Dec. 31, 2022
Business Combinations [Abstract]
ACQUISITIONS	(2) ACQUISITIONS Acquisitions of Businesses The following table summarizes the preliminary fair values of the assets acquired and liabilities assumed of ConcealFab as of the date of acquisition: ​ ​ ​ ​ ​ ​ As of June 1, ​ ​ 2022 Current assets ​ $ 21,133 Customer relationships ​ 26,200 Trade name ​ 5,000 Property, plant & equipment ​ 3,813 Other assets ​ 9,108 Goodwill ​ 42,465 Total fair value of assets acquired ​ $ 107,719 Current liabilities ​ 6,658 Long-term debt ​ 2,038 Operating lease liabilities ​ 7,812 Deferred taxes ​ 5,464 Other noncurrent liabilities ​ 12 Total fair value of liabilities assumed ​ $ 21,984 Non-controlling interest in consolidated subsidiaries ​ 41,693 Net assets acquired ​ $ 44,042 ​ ​ On May 12, 2021, the Company acquired the outstanding shares of Prospera Technologies, Ltd. ("Prospera"), an artificial intelligence company focused on machine learning and computer vision in agriculture, for $300,000 in cash (net of cash acquired). The acquisition of Prospera, located in Tel Aviv, Israel, was made to allow the Company to accelerate innovation with machine learning for agronomy and is reported in the Agriculture segment. Goodwill is not deductible for tax purposes, the trade name will be amortized over seven years, and the developed technology asset will be amortized over five years. The amount allocated to goodwill was primarily attributable to anticipated synergies and other intangibles that do not qualify for separate recognition. The Company finalized the purchase price allocation in the fourth quarter of 2021. (2) ACQUISITIONS – CONTINUED The following table summarizes the fair values of the assets acquired and liabilities assumed of Prospera as of the date of acquisition: ​ ​ ​ ​ ​ ​ As of May 12, ​ ​ 2021 Current assets ​ $ 647 Developed technology ​ 32,900 Trade name ​ 2,850 Property, plant & equipment ​ 1,063 Goodwill ​ 273,453 Total fair value of assets acquired ​ $ 310,913 Current liabilities ​ 2,690 Deferred taxes ​ 8,223 Total fair value of liabilities assumed ​ $ 10,913 Net assets acquired ​ $ 300,000 ​ On April 20, 2021 the Company acquired the assets of PivoTrac for $12,500 in cash. The agreed upon purchase price was $14,000, with $1,500 being held back for seller representations and warranties. The acquisition of PivoTrac, located in Texas, was made to allow the Company to advance its technology strategy and increase its number of connected agricultural devices and is reported in the Agriculture segment. The fair values assigned were $10,800 for goodwill, $2,627 for customer relationships, and the remainder is net working capital. Goodwill is not deductible for tax purposes and the customer relationship will be amortized over eight years. The amount allocated to goodwill was primarily attributable to anticipated synergies and other intangibles that do not qualify for separate recognition. The Company finalized the purchase price allocation in the second quarter of 2022. On May 29, 2020, the Company acquired 55% of Energia Solar do Brasil ("Solbras") for $4,308. Approximately $646 of the purchase price was contingent on seller representations and warranties and was settled for the full amount in the second quarter of 2021. Solbras is a leading provider of solar energy solutions for agriculture. In the purchase price allocation, goodwill of $3,341 and customer relationships of $3,718 were recorded and the remainder to net working capital. Goodwill is not deductible for tax purposes and the customer relationship will be amortized over eight years. The acquisition of Solbras, located in Brazil, was made to allow the Company to expand its product offerings in the Agriculture segment to include not only pivots, but also a sustainable and low-cost energy source to provide electricity to the units. The Company finalized the purchase price allocation in the fourth quarter of 2020. On March 6, 2020, the Company acquired 75% of KC Utility Packaging, LLC for $4,200. Approximately $400 of the purchase price was contingent on seller representations and warranties and was settled for the full amount in the first quarter of 2021. The Company name was subsequently changed to Valmont Substations, LLC. The acquisition was made to expand the Company’s utility substation product offering. In the purchase price allocation, goodwill of $1,100, customer relationships of $4,000, and other intangibles of $500 were recorded. The Company finalized the purchase price allocation in the fourth quarter of 2020. Proforma disclosures were omitted for these acquisitions as they do not have a significant impact on the Company’s financial results. Acquisition-related costs incurred for the above acquisitions were insignificant for all years presented. Acquisitions of Noncontrolling Interests In August 2022, the Company acquired the remaining 9% of Convert Italia S.p.A. for $3,046. As this transaction was for the acquisition of all remaining shares of consolidated subsidiary with no change in control, it was recorded within shareholders’ equity and as a financing cash flow in the Consolidated Statements of Cash Flows. In May 2022, the Company acquired the remaining 20% of Valmont West Coast Engineering, Ltd. for $4,292. As this transaction was for the acquisition of all of the remaining shares of consolidated subsidiary with no change in control, it was recorded within shareholders’ equity and as a financing cash flow in the Consolidated Statements of Cash Flows. (2) ACQUISITIONS – CONTINUED In February 2020, the Company acquired the remaining 49% of AgSense that it did not own for $43,983, which includes a holdback payment of $2,200 that was made in the second quarter of 2020. The accounting for owning 100% of AgSense resulted in the recognition of a deferred tax asset of approximately $7,700. In December 2020, the Company acquired the remaining 40% of Torrent Engineering and Equipment that it did not own for $3,500. In the first quarter of 2020, the Company acquired 16% of the remaining 25% that it did not own of Convert Italia S.p.A. for a cash payment of $11,750. The purchase agreement also settled the escrow funds which the Company had paid at date of acquisition.

DIVESTITURES

DIVESTITURES	12 Months Ended
	Dec. 31, 2022
Discontinued Operations and Disposal Groups [Abstract]
DIVESTITURES	(3) DIVESTITURES On November 30, 2022, the Company completed the sale of Valmont SM, the offshore wind energy structures business in Denmark, reported in the Other segment. The business was sold because it did not align with the long-term strategic plans for the Company. The offshore wind energy structures business’ historical annual sales, operating profit, and net assets are not significant for discontinued operations presentation. The offshore wind energy structures business had operating income of $2,259 for the year ended December 31, 2022, and an operating loss of $40,192 (inclusive of a $27,900 impairment of long-lived assets) for the year ended December 25, 2021. The Company received Danish Krone 90,000 (U.S. $12,570) at closing with an additional Danish Krone 28,000 (U.S. $4,027) held in an escrow account subject to normal closing conditions before it will be released to the Company. The assets and liabilities of the offshore wind energy structures business at closing on November 30, 2022 were as follows: ​ ​ ​ ​ ​ Cash and cash equivalents ​ $ 12,420 Receivables, net ​ ​ 35,407 Inventories ​ 1,144 Contract assets ​ ​ 19,127 Prepaid expenses and other assets ​ ​ 1,852 Net property, plant, and equipment ​ 12,915 Intangible assets ​ ​ 5,579 Other assets ​ ​ 1,103 Total assets ​ $ 89,547 ​ ​ ​ ​ Accounts payable ​ $ 23,611 Contract liabilities ​ ​ 34,814 Accrued expenses ​ ​ 4,737 Deferred income taxes ​ ​ 1,375 Total liabilities ​ $ 64,537 ​ ​ ​ ​ Net assets ​ $ 25,010 ​ The pre-tax loss from divestiture is reported in “Other income (expenses)”. The loss is comprised of the proceeds and an asset recognized for the escrow funds not yet released from buyer, less deal-related costs and the net assets of the business, which resulted in a loss of $12,123. In addition to this amount is a $21,150 realized loss on foreign exchange translation adjustments and net investment hedges previously reported in shareholders’ equity. ​ ​ ​ ​ ​ Pre-tax loss from divestitures, before recognition of currency translation loss ​ $ 12,123 Recognition of cumulative currency translation loss and hedges (reclassified from OCI) ​ 21,150 Net pre-tax loss from divestiture of offshore wind energy structures business ​ $ 33,273 ​ The transaction did not result in a taxable capital loss.

RESTRUCTURING ACTIVITIES

RESTRUCTURING ACTIVITIES	12 Months Ended
	Dec. 31, 2022
Restructuring and Related Activities [Abstract]
RESTRUCTURING ACTIVITIES	(4) RESTRUCTURING ACTIVITIES During 2020, the Company executed certain regional restructuring activities (the "2020 Plan") and a U.S. specific early retirement program. The 2020 Plan included the closure of one U.S. galvanizing facility. All 2020 restructuring activities were completed by December 26, 2020. The Company recorded the following pre-tax expenses: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Infrastructure ​ Agriculture ​ Other ​ Corporate ​ Total Severance ​ $ 1,139 ​ $ — ​ $ — ​ $ — ​ $ 1,139 Other cash restructuring expenses ​ 1,847 ​ — ​ — ​ — ​ 1,847 Impairments of fixed assets/net loss on disposals ​ 3,751 ​ — ​ — ​ — ​ 3,751 Total cost of sales ​ 6,737 ​ — ​ — ​ — ​ 6,737 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Severance ​ 7,873 ​ 2,968 ​ 1,192 ​ 1,761 ​ 13,794 Other cash restructuring expenses ​ 1,852 ​ — ​ 79 ​ 244 ​ 2,175 Impairments of assets / net loss on disposals ​ 349 ​ — ​ 94 ​ — ​ 443 Total selling, general and administrative expenses ​ 10,074 ​ 2,968 ​ 1,365 ​ 2,005 ​ 16,412 Consolidated total ​ $ 16,811 ​ $ 2,968 ​ $ 1,365 ​ $ 2,005 ​ $ 23,149 ​

CASH FLOW SUPPLEMENTARY INFORMA

CASH FLOW SUPPLEMENTARY INFORMATION	12 Months Ended
	Dec. 31, 2022
Supplemental Cash Flow Elements [Abstract]
CASH FLOW SUPPLEMENTARY INFORMATION	(5) CASH FLOW SUPPLEMENTARY INFORMATION The Company considers all highly liquid temporary cash investments purchased with an original maturity of three months or less at the time of purchase to be cash equivalents. Cash payments for interest and income taxes (net of refunds) for the fifty-three weeks ended December 31, 2022 and the fifty-two weeks ended December 25, 2021 and December 26, 2020 were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2022 2021 2020 Interest ​ ​ $ 46,653 ​ $ 41,159 ​ $ 40,209 Income taxes ​ ​ 93,109 ​ 60,366 ​ 54,801 ​ The sale of the offshore wind energy structures business in 2022 included a hold back receivable contingent on normal closing conditions that is expected to be resolved in the first half of 2023. The acquisitions in 2020 included hold back payments contingent on seller representations and warranties of $1,046. The 2020 hold back payments were released from a trust in the first half of 2021 and the 2019 hold back payments were paid in the first quarter of 2020 and are shown as an investing use of cash in the acquisitions line item of the Consolidated Statements of Cash Flows.

INVENTORIES

INVENTORIES	12 Months Ended
	Dec. 31, 2022
Inventory Disclosure [Abstract]
INVENTORIES	(6) INVENTORIES Inventories consisted of the following at December 31, 2022 and December 25, 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ December 25, ​ ​ 2022 2021 Raw materials and purchased parts ​ $ 258,814 ​ $ 278,107 Work-in-process ​ 44,453 ​ 63,628 Finished goods and manufactured goods ​ 425,495 ​ 387,099 ​ ​ $ 728,762 ​ $ 728,834 ​

PROPERTY, PLANT AND EQUIPMENT

PROPERTY, PLANT AND EQUIPMENT	12 Months Ended
	Dec. 31, 2022
Property, Plant and Equipment [Abstract]
PROPERTY, PLANT AND EQUIPMENT	(7) PROPERTY, PLANT, AND EQUIPMENT Property, plant, and equipment, at cost, consist of the following: ​ ​ ​ ​ ​ ​ ​ ​ 2022 2021 Land and improvements ​ $ 113,188 ​ $ 112,236 Buildings and improvements ​ 390,435 ​ 413,884 Machinery and equipment ​ 721,223 ​ 672,319 Transportation equipment ​ 30,610 ​ 27,020 Office furniture and equipment ​ 128,922 ​ 117,757 Construction in progress ​ 48,773 ​ 78,885 ​ ​ $ 1,433,151 ​ $ 1,422,101 ​

GOODWILL AND INTANGIBLE ASSETS

GOODWILL AND INTANGIBLE ASSETS	12 Months Ended
	Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
GOODWILL AND INTANGIBLE ASSETS	(8) GOODWILL AND INTANGIBLE ASSETS Amortized Intangible Assets The components of amortized intangible assets at December 31, 2022 and December 25, 2021 were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2022 ​ ​ Gross ​ ​ ​ ​ Weighted ​ ​ Carrying ​ Accumulated ​ Average ​ Amount Amortization Life Customer Relationships ​ $ 222,716 ​ $ 145,502 ​ 13 years Patents & Proprietary Technology ​ 58,404 ​ 21,291 9 years Trade Name ​ 2,850 ​ 645 7 years Other ​ 2,462 ​ 2,164 5 years ​ ​ $ 286,432 ​ $ 169,602 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 25, 2021 ​ ​ Gross ​ ​ ​ ​ Weighted ​ ​ Carrying ​ Accumulated ​ Average ​ ​ Amount Amortization Life Customer Relationships ​ $ 224,597 ​ $ 160,626 ​ 13 years Patents & Proprietary Technology ​ 58,699 ​ 13,955 9 years Trade Name ​ ​ 2,850 ​ ​ 183 ​ 7 years Other ​ 4,534 ​ 3,959 6 years ​ ​ $ 290,680 ​ $ 178,723 ​ ​ ​ Amortization expense for intangible assets was $22,120, $21,320, and $18,147 for the fiscal years ended December 31, 2022, December 25, 2021, and December 26, 2020, respectively. During the fourth quarter of fiscal 2021, an impairment test was required when the Company received clarifying information on the competitive environment of the offshore wind energy structures business. As a result, an impairment charge of approximately $4,483 was recognized against the remaining net book value of the related customer relationships. (8) GOODWILL AND INTANGIBLE ASSETS – CONTINUED Estimated annual amortization expense related to finite‑lived intangible assets is as follows: ​ ​ ​ ​ ​ Estimated ​ ​ Amortization ​ ​ Expense 2023 ​ $ 20,825 2024 ​ 18,888 2025 ​ 17,454 2026 ​ 12,933 2027 ​ 9,695 ​ The useful lives assigned to finite‑lived intangible assets included consideration of factors such as the Company’s past and expected experience related to customer retention rates, the remaining legal or contractual life of the underlying arrangement that resulted in the recognition of the intangible asset, and the Company’s expected use of the intangible asset. Non-Amortized Intangible Assets Intangible assets with indefinite lives are not amortized. The carrying values of these trade names at December 31, 2022 and December 25, 2021 were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, December 25, Year ​ ​ 2022 ​ 2021 ​ Acquired Newmark ​ $ 11,111 ​ $ 11,111 2004 Convert Italia S.p.A. ​ 8,024 ​ 8,479 2018 Webforge ​ ​ 7,107 ​ ​ 7,877 ​ 2010 Ingal EPS / Ingal Civil Products ​ 6,891 ​ 7,637 2010 Valmont SM ​ — ​ 6,082 2014 ConcealFab ​ 5,000 ​ — 2022 Shakespeare ​ 4,000 ​ 4,000 2014 Walpar ​ 3,500 ​ 3,500 2018 Other ​ 14,152 ​ 14,721 Various ​ ​ $ 59,785 ​ $ 63,407 ​ ​ ​ In its determination of these intangible assets as indefinite‑lived, the Company considered such factors as its expected future use of the intangible asset, legal, regulatory, technological, and competitive factors that may impact the useful life or value of the intangible asset, and the expected costs to maintain the value of the intangible asset. The Company expects that these intangible assets will maintain their value indefinitely. Accordingly, these assets are not amortized. Indefinite-lived intangibles, although not amortized, are still subject to annual impairment assessments, and interim date assessments should events arise that suggest their value may be diminished. The Company’s trade names were tested for impairment as of August 27, 2022. The values of each trade name were determined using the relief-from-royalty method. Based on this evaluation, no trade names were determined to be impaired. During the fourth quarter of fiscal year 2021, an impairment test was required when the Company received clarifying information on the competitive environment of the offshore wind energy structures business. As a result, an impairment charge of approximately $2,013 was recognized against the related trade name. In conjunction with an interim second quarter 2020 goodwill impairment test, impairment indicators were noted for the Webforge and Locker trade names requiring an interim impairment test. As a result, an impairment charge of approximately $3,900 was recognized against these two trade names in fiscal year 2020. (8) GOODWILL AND INTANGIBLE ASSETS – CONTINUED Goodwill The carrying amount of goodwill by segment as of December 31, 2022 and December 25, 2021 was as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Infrastructure ​ Agriculture ​ Other ​ Total Gross balance at December 25, 2021 ​ $ 442,521 ​ $ 313,512 ​ $ 14,355 ​ $ 770,388 Accumulated impairment losses ​ (47,467) ​ — ​ (14,355) ​ (61,822) Balance at December 25, 2021 ​ 395,054 ​ 313,512 ​ — ​ $ 708,566 Acquisitions ​ 42,465 ​ — ​ — ​ 42,465 Foreign currency translation ​ (11,435) ​ 265 ​ — ​ (11,170) Balance at December 31, 2022 ​ $ 426,084 ​ $ 313,777 ​ $ — ​ $ 739,861 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Infrastructure ​ Agriculture ​ Other ​ Total Gross balance at December 26, 2020 ​ $ 447,612 ​ $ 30,177 ​ $ 14,355 ​ $ 492,144 Accumulated impairment losses ​ (47,467) ​ — ​ (14,355) ​ (61,822) Balance at December 26, 2020 ​ 400,145 ​ 30,177 ​ — ​ 430,322 Acquisitions ​ — ​ 284,253 ​ — ​ 284,253 Foreign currency translation ​ (5,091) ​ (918) ​ — ​ (6,009) Balance at December 25, 2021 ​ $ 395,054 ​ $ 313,512 ​ $ — ​ $ 708,566 ​ The Company’s annual impairment test of goodwill was performed as of August 27, 2022, using primarily the discounted cash flow method. The solar tracking structure reporting unit projects meaningful annual revenue growth for the foreseeable future due to strong market conditions. Therefore, the Company valued this reporting unit using a blend of both the discounted cash flows and a market approach. The market valuation approach estimates the terminal value for this reporting unit using a multiple of earnings before interest, taxes, depreciation, and amortization (“EBITDA”). During fiscal year 2022, no goodwill impairment was recorded.

BANK CREDIT ARRANGEMENTS

BANK CREDIT ARRANGEMENTS	12 Months Ended
	Dec. 31, 2022
BANK CREDIT ARRANGEMENTS
BANK CREDIT ARRANGEMENTS	(9) BANK CREDIT ARRANGEMENTS The Company maintains various lines of credit for short-term borrowings totaling $125,034 available at December 31, 2022. As of December 31, 2022 and December 25, 2021, $5,846 and $13,439 was outstanding and recorded as notes payable to banks in the Consolidated Balance Sheets, respectively. The interest rates charged on these lines of credit vary in relation to the banks’ costs of funds. The weighted average interest rate on short-term borrowings was 6.52% at December 31, 2022. The unused and available borrowings under the lines of credit were $119,188 at December 31, 2022. The lines of credit can be modified at any time at the option of the banks. The Company pays no fees in connection with unused lines of credit.

INCOME TAXES

INCOME TAXES	12 Months Ended
	Dec. 31, 2022
Income Tax Disclosure [Abstract]
INCOME TAXES	(10) INCOME TAXES Earnings before income taxes and equity in earnings of nonconsolidated subsidiaries are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2022 2021 2020 United States ​ $ 224,370 ​ $ 202,051 ​ $ 169,281 Foreign ​ 139,518 ​ 58,032 ​ 23,487 ​ ​ $ 363,888 ​ $ 260,083 ​ $ 192,768 ​ (10) INCOME TAXES – CONTINUED Income tax expense (benefit) consists of: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2022 2021 2020 Current: ​ ​ ​ Federal ​ $ 48,309 ​ $ 30,031 ​ $ 30,431 State ​ 11,888 ​ 8,891 ​ 8,302 Foreign ​ 48,273 ​ 20,644 ​ 12,730 ​ ​ 108,470 ​ 59,566 ​ 51,463 Non-current: ​ 1,442 ​ 1,777 ​ (451) Deferred: ​ ​ ​ Federal ​ (7,544) ​ 4,587 ​ (6,086) State ​ (1,973) ​ 558 ​ (822) Foreign ​ 8,292 ​ (5,074) ​ 5,511 ​ ​ (1,225) ​ 71 ​ (1,397) ​ ​ $ 108,687 ​ $ 61,414 ​ $ 49,615 ​ The reconciliations of the statutory federal income tax rate and the effective tax rate follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2022 ​ 2021 ​ 2020 Statutory federal income tax rate 21.0 % ​ 21.0 % ​ 21.0 % State income taxes, net of federal benefit 2.3 ​ 2.9 ​ 3.5 ​ Carryforwards, credits and changes in valuation allowances 1.0 ​ 1.5 ​ (1.6) ​ Foreign jurisdictional tax rate differences 4.2 ​ (0.1) ​ (1.7) ​ Changes in unrecognized tax benefits 0.3 ​ 0.7 ​ 0.2 ​ Goodwill and intangible impairment — ​ — ​ 2.4 ​ Loss on divestiture of offshore wind energy structures business ​ 2.2 ​ — ​ — ​ Other (1.1) ​ (2.4) ​ 1.9 ​ ​ 29.9 % ​ 23.6 % ​ 25.7 % ​ Fiscal year 2022 includes $8,166 of tax expense related to the divestiture of the offshore wind energy structures business for which no benefit has been recorded. Fiscal year 2021 includes $1,894 of U.S. tax benefits related to foreign taxes paid offset by $5,102 of valuation allowance recorded against the offshore wind energy structures business deferred tax assets. Fiscal year 2020 includes $4,651 of tax expense related to non-tax deductible impairment of goodwill. Fiscal year 2020 also includes $1,100 of tax expense primarily related to restructuring charges for which no tax benefits have been recorded due to the increase in valuation allowance. (10) INCOME TAXES – CONTINUED Deferred income taxes reflect the net tax effects of (a) temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes, and (b) operating loss and tax credit carryforwards. The tax effects of significant items comprising the Company’s net deferred income tax assets/liabilities are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ 2022 2021 Deferred income tax assets: ​ ​ Accrued expenses and allowances ​ $ 33,577 ​ $ 21,241 Tax credits and loss carryforwards ​ 67,249 ​ 83,690 Defined benefit pension liability ​ — ​ 134 Inventory allowances ​ 7,912 ​ 2,818 Accrued compensation and benefits ​ 24,398 ​ 24,302 Lease liabilities ​ 40,709 ​ 41,128 Deferred compensation ​ 16,308 ​ 10,893 Gross deferred income tax assets ​ 190,153 ​ 184,206 Valuation allowance ​ (48,974) ​ (54,256) Net deferred income tax assets ​ 141,179 ​ 129,950 Deferred income tax liabilities: ​ ​ Property, plant and equipment ​ 45,300 ​ 37,686 Intangible assets ​ 52,750 ​ 48,244 Defined benefit pension asset ​ 6,054 ​ — Lease assets ​ 40,708 ​ 41,128 Other deferred tax liabilities ​ 4,941 ​ 5,041 Total deferred income tax liabilities ​ 149,753 ​ 132,099 Net deferred income tax asset (liability) ​ $ (8,574) ​ $ (2,149) ​ Deferred income tax assets (liabilities) are presented as follows on the Consolidated Balance Sheets: ​ ​ ​ ​ ​ ​ ​ Balance Sheet Caption 2022 2021 Other assets ​ $ 32,517 ​ $ 45,700 Deferred income taxes ​ (41,091) ​ (47,849) Net deferred income tax asset (liability) ​ $ (8,574) ​ $ (2,149) ​ Management of the Company has reviewed recent operating results and projected future operating results. The Company’s belief that realization of its net deferred tax assets is more likely than not is based on, among other factors, changes in operations that have occurred in recent years and available tax planning strategies. At December 31, 2022 and December 25, 2021 respectively, there were $67,249 and $83,690 relating to tax credits and loss carryforwards. Valuation allowances have been established for certain losses that reduce deferred tax assets to an amount that will, more likely than not, be realized. During fiscal 2021, it was determined no longer more likely than not that the offshore wind energy structures business, based in Denmark, would generate future taxable income so a valuation allowance of $5,102 was recognized against their tax loss carryforwards. During fiscal year 2022, the offshore wind energy structures business was sold. Also in 2021, the Company recorded a valuation allowance of $6,472 against the tax attributes related to the acquisition of Prospera. The deferred tax assets at December 31, 2022 that are associated with tax loss and tax credit carryforwards not reduced by valuation allowances expire in periods starting in 2023. Uncertain tax positions included in other non-current liabilities are evaluated in a two-step process, whereby (1) the Company determines whether it is more likely than not that the tax positions will be sustained based on the technical merits of the position and (2) for those tax positions that meet the more likely than not recognition threshold, the Company would recognize the largest amount of tax benefit that is greater than fifty percent likely to be realized upon ultimate settlement with the related tax authority. ​ (10) INCOME TAXES – CONTINUED The following summarizes the activity related to the unrecognized tax benefits in 2022 and 2021: ​ ​ ​ ​ ​ ​ ​ ​ 2022 2021 Gross unrecognized tax benefits—beginning of year ​ $ 2,664 ​ $ 1,864 Gross increases—tax positions in prior period ​ 1,133 ​ 1,315 Gross decreases—tax positions in prior period ​ — ​ (6) Gross increases—current‑period tax positions ​ 523 ​ 240 Settlements with taxing authorities ​ (1,576) ​ — Lapse of statute of limitations ​ (208) ​ (749) Gross unrecognized tax benefits—end of year ​ $ 2,536 ​ $ 2,664 ​ There are approximately $1,141 of uncertain tax positions for which reversal is reasonably possible during the next 12 months due to the closing of the statute of limitations. The nature of these uncertain tax positions is generally the computation of a tax deduction or tax credit. During 2022, the Company recorded a reduction of its gross unrecognized tax benefit of $208 with $165 recorded as a reduction of income tax expense, due to the expiration of statutes of limitation in the United States. During 2021, the Company recorded a reduction of its gross unrecognized tax benefit of $749 with $592 recorded as a reduction of income tax expense, due to the expiration of statutes of limitation in the United States. In addition to these amounts, there was an aggregate of $172 and $1,758 of interest and penalties at December 31, 2022 and December 25, 2021, respectively. The Company’s policy is to record interest and penalties directly related to income taxes as income tax expense in the Consolidated Statements of Earnings. The Company files income tax returns in the U.S. and various states as well as foreign jurisdictions. Tax years 2019 and forward remain open under U.S. statutes of limitation. The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate was $2,447 and $4,324 at December 31, 2022 and December 25, 2021, respectively.

LONG-TERM DEBT

LONG-TERM DEBT	12 Months Ended
	Dec. 31, 2022
Debt Disclosure [Abstract]
LONG-TERM DEBT	(11) LONG-TERM DEBT Long-term debt is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, December 25, ​ 2022 2021 5.00% senior unsecured notes due 2044 (a) ​ $ 450,000 ​ $ 450,000 5.25% senior unsecured notes due 2054 (b) ​ 305,000 ​ 305,000 Unamortized discount on 5.00% and 5.25% senior unsecured notes (a) (b) ​ (20,053) ​ (20,436) Revolving credit agreement (c) ​ 140,513 ​ 218,897 Other notes ​ 3,587 ​ 5,684 Debt issuance costs ​ (6,918) ​ (7,189) Long-term debt ​ 872,129 ​ 951,956 Less: Current installments of long-term debt ​ 1,194 ​ 4,884 Long-term debt, excluding current installments ​ $ 870,935 ​ $ 947,072 ​ (a) The 5.00% senior unsecured notes due 2044 include an aggregate principal amount of $450,000 on which interest is paid and an unamortized discount balance of $12,820 at December 31, 2022. The notes bear interest at 5.000% per annum and are due on October 1, 2044. The discount will be amortized and recognized as interest expense as interest payments are made over the term of the notes. The notes may be repurchased prior to maturity in whole, or in part, at any time at 100% of their principal amount plus a make-whole premium and accrued and unpaid interest. These notes are guaranteed by certain subsidiaries of the Company. (b) The 5.25% senior unsecured notes due 2054 include an aggregate principal amount of $305,000 on which interest is paid and an unamortized discount balance of $7,233 at December 31, 2022. The notes bear interest at 5.250% per annum and are due on October 1, 2054. The discount will be amortized and recognized as interest expense as interest payments are made over the term of the notes. The notes may be repurchased prior to maturity in whole, or in part, at any time at 100% of their principal amount plus a make-whole premium and accrued and unpaid interest. These notes are guaranteed by certain subsidiaries of the Company. (11) LONG-TERM DEBT – CONTINUED (c) On October 18, 2021, the Company along with its wholly-owned subsidiaries Valmont Industries Holland B.V. and Valmont Group Pty. Ltd., as borrowers, entered into an amendment and restatement of the revolving credit agreement with the Company’s lenders. The maturity date of the revolving credit facility was extended to October 18, 2026. The credit facility provides for $800,000 of committed unsecured revolving credit loans with available borrowings thereunder to $400,000 in foreign currencies. The Company may increase the credit facility by up to an additional $300,000 at any time, subject to lenders increasing the amount of their commitments. The interest rate on the borrowings will be, at the Company’s option, either: (i) term SOFR (based on a 1-, 3-, or 6-month interest period, as selected by the Company) plus a 10 basis point adjustment plus a spread of 100 to 162.5 basis points, depending on the credit rating of the Company’s senior, unsecured, long-term debt published by Standard & Poor’s Rating Services and Moody’s Investors Service, Inc.; (ii) the higher of ● the prime lending rate , ● the overnight bank rate plus 50 basis points, and ● term SOFR (based on a 1 month interest period) plus 100 basis points, plus, in each case, 0 to 62.5 basis points, depending on the credit rating of the Company’s senior, unsecured, debt published by Standard & Poor’s Rating Services and Mood’s Investors Service, Inc.; or (iii) daily simple SOFR plus a 10 basis point adjustment plus a spread of 100 to 162.5 basis points, depending on the credit rating of the Company’s senior, unsecured, long-term debt published by Standard & Poor’s Rating Services and Mood’s Investors Service, Inc. At December 31, 2022, the Company had $140,513 outstanding borrowings under the revolving credit facility. The revolving credit facility has a maturity date of October 18, 2026, and contains a financial covenant that may limit additional borrowing capability under the agreement. At December 31, 2022, the Company had the ability to borrow $659,401 under this facility, after consideration of standby letters of credit of $162 associated with certain insurance obligations. The Company also maintains certain short-term bank lines of credit totaling $125,034, of which $119,188 was unused at December 31, 2022. The revolving credit facility includes a financial leverage covenant. The Company was in compliance with this covenant at December 31, 2022. The minimum aggregate maturities of long-term debt for each of the five years following 2022 are: $1,194, $860, $679, $141,081, and $10. The obligations arising under the 5.00% senior unsecured notes due 2044, the 5.25% senior unsecured notes due 2054, and the revolving credit facility are guaranteed by the Company and its wholly owned subsidiaries Valmont Telecommunications, Inc., Valmont Coatings, Inc., Valmont Newmark, Inc., and Valmont Queensland Pty. Ltd.

STOCK-BASED COMPENSATION

STOCK-BASED COMPENSATION	12 Months Ended
	Dec. 31, 2022
Share-based Payment Arrangement [Abstract]
STOCK-BASED COMPENSATION	(12) STOCK-BASED COMPENSATION The Company maintains stock‑based compensation plans approved by the shareholders, which provide that the Human Resource Committee of the Board of Directors may grant incentive stock options, nonqualified stock options, stock appreciation rights, restricted stock awards, restricted stock units, and bonuses of common stock. At December 31, 2022, 1,722,643 shares of common stock remained available for issuance under the plans. Shares and options issued and available are subject to changes in capitalization. The Company’s policy is to issue shares upon exercise of stock options or vesting of restricted stock units or issuance of restricted stock from treasury shares held by the Company. Under the stock option plans, the exercise price of each option equals the market price at the time of the grant. Options vest beginning on the first anniversary of the grant in equal amounts over three years or on the fifth anniversary of the grant. Expiration of grants is seven (12) STOCK-BASED COMPENSATION – CONTINUED At December 31, 2022, the amount of unrecognized stock option compensation expense, to be recognized over a weighted average period of 2.37 years, was approximately $6,814. Compensation expense for stock options was $3,120 in 2022, $2,538 in 2021, and $2,628 in 2020. The Company uses a binomial option pricing model to value its stock options. The fair value of each option grant made in 2022, 2021 and 2020 was estimated using the following assumptions: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2022 ​ 2021 ​ 2020 Expected volatility 32.36 % ​ 33.01 % ​ 33.72 % Risk-free interest rate 3.75 % ​ 1.26 % ​ 0.43 % Expected life from vesting date 5.4 yrs ​ 4.0 yrs ​ 4.0 yrs ​ Dividend yield 1.10 % ​ 1.20 % ​ 1.24 % ​ Following is a summary of the stock option activity during 2020, 2021 and 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted ​ ​ ​ ​ ​ ​ ​ Weighted ​ Average ​ ​ ​ ​ ​ ​ ​ Average ​ Remaining ​ Aggregate ​ ​ Number of ​ Exercise ​ Contractual ​ Intrinsic ​ Shares Price Term Value Outstanding at December 28, 2019 488,560 ​ $ 133.13 ​ Granted 66,231 ​ 168.80 ​ Exercised (147,014) ​ 125.43 ​ Forfeited (8,212) ​ 137.49 ​ Outstanding at December 26, 2020 399,565 ​ $ 141.79 4.88 ​ $ 12,103 Options vested or expected to vest at December 26, 2020 389,633 ​ $ 141.56 4.81 ​ 11,890 Options exercisable at December 26, 2020 254,498 ​ $ 138.64 3.38 ​ 8,510 ​ The weighted average per share fair value of options granted during 2020 was $45.49. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted ​ ​ ​ ​ ​ ​ ​ Weighted ​ Average ​ ​ ​ ​ ​ ​ ​ Average ​ Remaining ​ Aggregate ​ ​ Number of ​ Exercise ​ Contractual ​ Intrinsic ​ Shares Price Term Value Outstanding at December 26, 2020 399,565 ​ $ 141.79 ​ Granted 47,223 ​ 252.89 ​ Exercised (169,908) ​ 135.76 ​ Forfeited (416) ​ 132.84 ​ Outstanding at December 25, 2021 276,464 ​ $ 164.48 5.88 ​ $ 22,586 Options vested or expected to vest at December 25, 2021 268,338 ​ $ 163.42 5.80 ​ 22,188 Options exercisable at December 25, 2021 154,860 ​ $ 142.15 4.00 ​ 15,896 ​ The weighted average per share fair value of options granted during 2021 was $67.81. ​ (12) STOCK-BASED COMPENSATION – CONTINUED ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted ​ ​ ​ ​ ​ ​ ​ Weighted ​ Average ​ ​ ​ ​ ​ ​ ​ Average ​ Remaining ​ Aggregate ​ ​ Number of ​ Exercise ​ Contractual ​ Intrinsic ​ Shares Price Term Value Outstanding at December 25, 2021 276,464 ​ $ 164.48 ​ Granted 40,564 ​ 332.63 ​ Exercised (121,163) ​ 139.89 ​ Forfeited (175) ​ 104.47 ​ Outstanding at December 31, 2022 195,690 ​ $ 214.62 7.53 ​ $ 22,644 Options vested or expected to vest at December 31, 2022 189,267 ​ $ 212.69 7.48 ​ 22,261 Options exercisable at December 31, 2022 90,556 ​ $ 172.08 6.40 ​ 14,276 ​ The weighted average per share fair value of options granted during 2022 was $104.01. In accordance with shareholder-approved plans, the Human Resource Committee of the Board of Directors may grant stock under various stock‑based compensation arrangements, including restricted stock awards, restricted stock units, performance based restricted stock units, and stock issued in lieu of cash bonuses. Under such arrangements, stock or cash (as applicable) is issued without direct cost to the employee. The restricted stock units are settled in Company stock when the restriction period ends. Restricted stock units and awards generally vest in equal installments over three years beginning on the first anniversary of the grant. All cash-settled restricted stock units are marked-to-market and presented within other accrued expenses and noncurrent liabilities in the Consolidated Balance Sheets. During fiscal 2022, 2021 and 2020, the Company granted restricted stock units to directors and certain management employees as follows (which are not included in the above stock plan activity tables): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2022 2021 2020 Restricted stock units granted ​ 60,901 ​ 216,971 ​ 85,251 Weighted‑average per share price on grant date ​ $ 313.75 ​ $ 236.28 ​ $ 161.73 Recognized compensation expense ​ $ 22,664 ​ $ 16,147 ​ $ 9,081 ​ During the second half of 2021, the Company granted 159,982 restricted stock units, worth $36,916, to certain employees of Prospera. These restricted stock units vest in equal installments over four years and require the employees to continue employment over those four years. As such, the related compensation expense will be incurred over the vesting period. At December 31, 2022 the amount of deferred stock‑based compensation granted, to be recognized over a weighted‑average period of 2.73 years, was approximately $50,422. Performance-based restricted stock units (“PSU”) awards consist of shares of the Company’s stock which are payable upon the determination that the Company achieve certain established performance targets and can range from 0% to 200% of the targeted payout based on the actual results. PSUs granted in 2022 and 2021 have a performance period of three years. The fair value of each PSU granted is equal to the fair market value of the Company’s common stock on the date of grant. PSUs granted generally have a three years period cliff vesting schedule; however, according to the grant agreements, if certain conditions are met, the employee (or beneficiary) will receive a prorated amount of the award based on active employment during the service period. During fiscal 2022, 2021 and 2020, the Company granted PSU awards as follows (which are not included in the above stock plan activity tables): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2022 2021 2020 Shares granted ​ 33,736 ​ 41,060 ​ 35,181 Weighted‑average per share price on grant date ​ $ 215.15 ​ $ 230.40 ​ $ 125.41 Recognized compensation expense ​ $ 16,066 ​ $ 10,035 ​ $ 3,165 ​ ​

EARNINGS PER SHARE

EARNINGS PER SHARE	12 Months Ended
	Dec. 31, 2022
Earnings Per Share [Abstract]
EARNINGS PER SHARE	(13) EARNINGS PER SHARE The following table provides a reconciliation between basic and diluted earnings per share (“EPS”): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Dilutive ​ ​ ​ ​ ​ ​ Effect of ​ ​ ​ ​ ​ ​ ​ Stock ​ Diluted ​ ​ Basic EPS ​ Options ​ EPS 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ Net earnings attributable to Valmont Industries, Inc. ​ $ 250,863 ​ $ — ​ $ 250,863 Weighted average shares outstanding (000’s) ​ 21,311 ​ 269 ​ 21,580 Per share amount ​ $ 11.77 ​ $ (0.15) ​ $ 11.62 2021: ​ ​ ​ Net earnings attributable to Valmont Industries, Inc. ​ $ 195,630 ​ $ — ​ $ 195,630 Weighted average shares outstanding (000’s) ​ 21,193 ​ 300 ​ 21,493 Per share amount ​ $ 9.23 ​ $ (0.13) ​ $ 9.10 2020: ​ ​ ​ Net earnings attributable to Valmont Industries, Inc. ​ $ 140,693 ​ $ — ​ $ 140,693 Weighted average shares outstanding (000’s) ​ 21,315 ​ 110 ​ 21,425 Per share amount ​ $ 6.60 ​ $ (0.03) ​ $ 6.57 ​ Basic and diluted net earnings and earnings per share in fiscal year 2022 were impacted by a loss from the divestiture of the offshore wind energy structures’ business of $33,273 (no associated tax benefit) ($1.54 per share). Basic and diluted net earnings and earnings per share in fiscal year 2021 were impacted by impairments of long-lived assets (customer relationship intangible asset, trade name, and property, plant and equipment) associated with the offshore wind energy structures business of $21,678 after-tax ($1.01 per share) and a valuation allowance against the deferred tax assets of the offshore wind energy structures business of $5,076 after-tax ($0.24 per share). Basic and diluted net earnings and earnings per share in fiscal year 2020 were impacted by impairments of goodwill and intangible assets in fiscal year 2020 of $16,220 after-tax ($0.76 per share) and restructuring expenses of $17,324 after-tax ($0.81 per share). Earnings per share are computed independently for each of the quarters. Therefore, the sum of the quarterly earnings per share may not equal the total for the year. At the end of fiscal years 2022, 2021, and 2020 there were 40,564, 47,223, and 0 outstanding stock options, respectively, with exercise prices exceeding the market price of common stock that were excluded from the computation of diluted earnings per share, respectively.

EMPLOYEE RETIREMENT SAVINGS PLA

EMPLOYEE RETIREMENT SAVINGS PLAN	12 Months Ended
	Dec. 31, 2022
Retirement Benefits [Abstract]
EMPLOYEE RETIREMENT SAVINGS PLAN	(14) EMPLOYEE RETIREMENT SAVINGS PLAN Established under Internal Revenue Code Section 401(k), the Valmont Employee Retirement Savings Plan (“VERSP”) is a defined contribution plan available to all eligible employees. Participants can elect to contribute up to 60% of annual pay, on a pre-tax and/or after-tax basis. The Company also makes contributions to the VERSP and a non-qualified deferred compensation plan for certain Company executives. The 2022, 2021, and 2020 Company contributions to these plans amounted to approximately $18,300, $16,000, and $14,800, respectively. The Company sponsors a fully‑funded, non-qualified deferred compensation plan for certain Company executives who otherwise would be limited in receiving company contributions into the VERSP under Internal Revenue Service regulations. The invested assets and related liabilities of these participants were $25,008 and $29,982 at December 31, 2022 and December 25, 2021, respectively. Such amounts are included in “Other assets” and “Deferred compensation” on the Consolidated Balance Sheets. Amounts distributed from the Company’s non-qualified deferred compensation plan to participants under the transition rules of section 409A of the Internal Revenue Code were approximately $4,691 and $8,900 at December 31, 2022 and December 25, 2021, respectively. All distributions were made in cash. ​

DISCLOSURES ABOUT THE FAIR VALU

DISCLOSURES ABOUT THE FAIR VALUE OF FINANCIAL INSTRUMENTS	12 Months Ended
	Dec. 31, 2022
Fair Value Disclosures [Abstract]
DISCLOSURES ABOUT THE FAIR VALUE OF FINANCIAL INSTRUMENTS	(15) DISCLOSURES ABOUT THE FAIR VALUE OF FINANCIAL INSTRUMENTS The carrying amount of cash and cash equivalents, receivables, accounts payable, notes payable to banks, and accrued expenses approximate fair value because of the short maturity of these instruments. The fair values of each of the Company’s long-term debt instruments are based on the amount of future cash flows associated with each instrument discounted using the Company’s current borrowing rate for similar debt instruments of comparable maturity (Level 2). The fair value estimates are made at a specific point in time and the underlying assumptions are subject to change based on market conditions. At December 31, 2022, the carrying amount of the Company’s long-term debt was $872,129 with an estimated fair value of approximately $807,281. At December 25, 2021, the carrying amount of the Company’s long-term debt was $951,956 with an estimated fair value of approximately $1,175,332. ASC 820 establishes a three‑level hierarchy for fair value measurements based upon the transparency of inputs to the valuation of an asset or liability as of the measurement date is used. Inputs refers broadly to the assumptions that market participants would use in pricing the asset or liability, including assumptions about risk. Financial assets and liabilities carried at fair value will be classified and disclosed in one of the following three categories: ● Level 1: Quoted market prices in active markets for identical assets or liabilities. ● Level 2: Observable market based inputs or unobservable inputs that are corroborated by market data. ● Level 3: Unobservable inputs that are not corroborated by market data. The categorization within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. Following is a description of the valuation methodologies used for assets and liabilities measured at fair value. Trading Securities: The assets and liabilities recorded for the investments held in the Valmont Deferred Compensation Plan 2021 Derivative Financial Instruments: The fair value of foreign currency and commodity forward and cross currency contracts is based on a valuation model that discounts cash flows resulting from the differential between the contract price and the market-based forward rate. Mutual Funds: The Company has short-term investments in various mutual funds. Marketable Securities: The Company’s marketable securities consist of short-term investments in certificates of deposit. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurement Using: ​ ​ ​ Quoted Prices in Significant Other Significant ​ ​ ​ ​ ​ Active Markets ​ Observable ​ Unobservable ​ ​ Carrying Value ​ for Identical ​ Inputs ​ Inputs ​ ​ December 31, 2022 ​ Assets (Level 1) ​ (Level 2) ​ (Level 3) Assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Trading securities ​ $ 25,008 ​ $ 25,008 ​ $ — ​ $ — Derivative financial instruments, net ​ $ 1,404 ​ $ — ​ $ 1,404 ​ $ — Cash and cash equivalents - mutual funds ​ $ 7,205 ​ $ 7,205 ​ $ — ​ $ — Cash and cash equivalents - marketable securities ​ $ 136 ​ $ — ​ $ 136 ​ $ — ​ (15) DISCLOSURES ABOUT THE FAIR VALUE OF FINANCIAL INSTRUMENTS – CONTINUED ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurement Using: ​ ​ ​ Quoted Prices in Significant Other Significant ​ ​ Carrying Value ​ Active Markets ​ Observable ​ Unobservable ​ ​ December 25, ​ for Identical ​ Inputs ​ Inputs ​ ​ 2021 ​ Assets (Level 1) ​ (Level 2) ​ (Level 3) Assets (Liabilities): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Trading securities ​ $ 30,076 ​ $ 30,076 ​ $ — ​ $ — Derivative financial instruments, net ​ $ (4,007) ​ $ — ​ $ (4,007) ​ $ — ​

DERIVATIVE FINANCIAL INSTRUMENT

DERIVATIVE FINANCIAL INSTRUMENTS	12 Months Ended
	Dec. 31, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVE FINANCIAL INSTRUMENTS	(16) DERIVATIVE FINANCIAL INSTRUMENTS The Company manages interest rate risk, commodity price risk, and foreign currency risk related to foreign currency denominated transactions and investments in foreign subsidiaries. Depending on the circumstances, the Company may manage these risks by utilizing derivative financial instruments. Some derivative financial instruments are marked to market and recorded in the Company’s Consolidated Statements of Earnings, while others may be accounted for as fair value, cash flow, or net investment hedges. The Company had open foreign currency forward contracts that are marked to market at December 31, 2022 and December 25, 2021, which are insignificant and thus excluded from the tables below. Derivative financial instruments have credit and market risk. The Company manages these risks of derivative instruments by monitoring limits as to the types and degree of risk that can be taken, and by entering into transactions with counterparties who are recognized, stable multinational banks. Fair value of derivative instruments at December 31, 2022 and December 25, 2021 are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives designated as hedging instruments: Balance sheet location ​ 2022 ​ 2021 Commodity forward contracts ​ Accrued expenses ​ $ (3,854) ​ $ (5,802) Foreign currency forward contracts Prepaid expenses and other assets ​ ​ 83 ​ 149 Foreign currency forward contracts Accrued expenses ​ ​ — ​ (118) Cross currency swap contracts Prepaid expenses and other assets ​ ​ 5,385 ​ 1,764 Cross currency swap contracts Accrued expenses ​ ​ (210) ​ — ​ ​ ​ ​ $ 1,404 ​ $ (4,007) ​ Gains (losses) on derivatives recognized in the Consolidated Statements of Earnings for the years ended December 31, 2022, December 25, 2021, and December 26, 2020 are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives designated as hedging instruments: ​ Statements of earnings location ​ ​ 2022 ​ 2021 ​ 2020 Commodity forward contracts ​ Product cost of sales ​ ​ $ (5,212) ​ $ 25,821 ​ $ — Foreign currency forward contracts ​ Product sales ​ ​ ​ — ​ ​ — ​ ​ 1,598 Foreign currency forward contracts ​ Other income ​ ​ ​ (45) ​ (40) ​ 187 Interest rate hedge amortization ​ Interest expense ​ ​ ​ (64) ​ (64) ​ (64) Cross currency swap contracts ​ Loss from divestiture of wind energy structures business ​ ​ ​ 4,827 ​ — ​ — Cross currency swap contracts ​ Interest expense ​ ​ ​ 2,875 ​ 2,780 ​ 2,738 ​ ​ ​ ​ ​ $ 2,381 ​ $ 28,497 ​ $ 4,459 ​ Cash Flow Hedges During 2021, the Company entered into steel hot rolled coil (“HRC”) forward contracts that qualify as a cash flow hedge of the variability in cash flows attributable to future steel purchases. The forward contracts had a notional amount of $93,498 for the total purchase of 86,100 short tons. During the second quarter of 2022, the Company entered into additional steel HRC forward contracts that qualify as a cash flow hedge of the variability in cash flows attributable to future steel purchases. The forward contracts had a notional amount of $14,010 for the total purchase of 15,000 short tons. As of December 31, 2022, the forward contracts had a notional amount of $9,766 for the total purchase of 10,300 short tons from January 2023 to March 2023. The gain (loss) realized upon settlement will be recorded in product cost of sales in the Consolidated Statements of Earnings over average inventory turns. ​ (16) DERIVATIVE FINANCIAL INSTRUMENTS – CONTINUED During the third quarter of 2022, the Company entered into natural gas commodity forward contracts that qualify as a cash flow hedge of the variability in cash flows attributable to future natural gas purchases. The forward contracts had a notional amount of $5,211 for the total purchase of 770,000 mmBtu from October 2022 to October 2023. During the fourth quarter of 2022, the Company entered into additional natural gas commodity forward contracts that also qualify as a cash flow hedge. The forward contracts had a notional amount of $3,088 for the total purchase of 620,000 mmBtu from January 2023 to October 2024. As of December 31, 2022, the forward contracts had a notional amount of $7,043 for the total purchase of 1,230,000 mmBtu from January 2023 to October 2024. The gain (loss) realized upon settlement will be recorded in “Product cost of sales” in the Consolidated Statements of Earnings in the period consumed. During the third quarter of 2022, a subsidiary with a euro functional currency entered into a foreign currency forward contract to mitigate foreign currency risk related to a large customer order denominated in U.S. dollars. The forward contract, which qualifies as a fair value hedge, matures in February 2023 and has a notional amount to sell $1,800 in exchange for a stated amount of euros. During 2021, a Brazilian subsidiary with a real functional currency entered into foreign currency forward contracts to mitigate foreign currency risk related to a customer order with components purchased in euros. The forward contracts, which qualified as a cash flow hedge, matured in July and September 2021 and had notional amounts to buy 3,800 euros in exchange for a stated amount of Brazilian real. During 2021, a subsidiary with a euro functional currency entered into a foreign currency forward contract to mitigate foreign currency risk related to a large customer order denominated in U.S. dollars. The forward contract, which qualified as a fair value hedge, matured in December 2021 and a notional amount to sell $2,000 in exchange for a stated amount of euros. In 2020, a Brazilian subsidiary with a real functional currency entered into foreign currency forward contracts to mitigate foreign currency risk related to a customer order with components purchased in euros. The forward contracts, which qualified as a cash flow hedge, matured in December 2020 and a notional amount to buy 4,500 euros in exchange for a stated amount of Brazilian real. In 2020, a subsidiary with a euro functional currency entered into foreign currency forward contracts to mitigate foreign currency risk related to a large customer order denominated in U.S. dollars. The forward contracts, which qualified as a cash flow hedge, matured in June 2021 and a notional amount to sell $27,500 in exchange for a stated amount of euros. Net Investment Hedges In the second quarter of 2020, the Company early settled its Australian dollar denominated foreign currency forward contracts and received proceeds of $11,983. Amounts will remain in OCI until either the sale or substantially complete liquidation of the related subsidiaries. In the second quarter of 2019, the Company entered into two fixed-for-fixed cross currency swaps ("CCS"), swapping U.S. dollar principal and interest payments on a portion of its 5.00% senior unsecured notes due 2044 for Danish krone (“DKK”) and euro denominated payments. The CCS were entered into in order to mitigate foreign currency risk on the Company’s euro and DKK investments and to reduce interest expense. Interest is exchanged twice per year on April 1 and October 1. The Company designated the full notional amount of the two CCS ($130,000) as a hedge of the net investment in certain Danish and European subsidiaries under the spot method, with all changes in the fair value of the CCS that are included in the assessment of effectiveness (changes due to spot foreign exchange rates) are recorded as cumulative foreign currency translation within AOCI. Net interest receipts will be recorded as a reduction of interest expense over the life of the CCS. During the second half of 2022, the Company settled the DKK CCS and received proceeds of $3,532. Due to the sale of the offshore wind energy structures business in the fourth quarter of 2022, the Company reclassified the cumulative net investment hedge gain of $4,827 ($3,620 after tax) from OCI to “Loss from divestiture of offshore wind energy structures business” in the Consolidated Statements of Earnings. Key terms of the Euro CCS are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Notional ​ ​ ​ Swapped ​ Set Settlement Currency ​ Amount ​ Termination Date ​ Interest Rate ​ Amount Euro ​ $ 80,000 ​ April 1, 2024 2.825% ​ € 71,550 ​ ​

GUARANTEES

GUARANTEES	12 Months Ended
	Dec. 31, 2022
Guarantees [Abstract]
GUARANTEES	(17) GUARANTEES The Company’s product warranty accrual reflects management’s best estimate of probable liability under its product warranties. Historical product claims data is used to estimate the cost of product warranties at the time revenue is recognized. Changes in the product warranty accrual, which is recorded in “Accrued expenses”, for the years ended December 31, 2022 and December 25, 2021, were as follows: ​ ​ ​ ​ ​ ​ ​ ​ 2022 2021 Balance, beginning of period ​ $ 21,308 ​ $ 14,787 Payments made ​ (10,569) ​ (6,444) Change in liability for warranties issued during the period ​ 12,866 ​ 13,534 Change in liability for pre-existing warranties ​ (3,832) ​ (569) Balance, end of period ​ $ 19,773 ​ $ 21,308 ​

COMMITMENTS & CONTINGENCIES

COMMITMENTS & CONTINGENCIES	12 Months Ended
	Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS & CONTINGENCIES	(18) COMMITMENTS & CONTINGENCIES Various claims and lawsuits are pending against Company and certain of its subsidiaries. The Company cannot fully determine the effect of all asserted and unasserted claims on its consolidated results of operations, financial condition, or liquidity. Where asserted and unasserted claims are considered probable and reasonably estimable, a liability has been recorded. The Company does not expect that any known lawsuits, claims, environmental costs, commitments, or contingent liabilities will have a material adverse effect on the consolidated results of operations, financial condition, or liquidity.

DEFINED BENEFIT RETIREMENT PLAN

DEFINED BENEFIT RETIREMENT PLAN	12 Months Ended
	Dec. 31, 2022
Retirement Benefits [Abstract]
DEFINED BENEFIT RETIREMENT PLAN	(19) DEFINED BENEFIT RETIREMENT PLAN Delta Ltd., a wholly-owned subsidiary of the Company, is the sponsor of the Delta Pension Plan ("Plan"). The Plan provides defined benefit retirement income to eligible employees in the United Kingdom. Pension retirement benefits to qualified employees are 1.67% of final salary per year of service upon reaching the age of 65 years. This Plan has no active employees as members at December 31, 2022. Funded Status The Company recognizes the overfunded or underfunded status of the pension plan as an asset or liability. The funded status represents the difference between the projected benefit obligation (“PBO”) and the fair value of the plan assets. The PBO is the present value of benefits earned to date by plan participants, including the effect of assumed future salary increases (if applicable) and inflation. Plan assets are measured at fair value. Because the pension plan is denominated in British pounds sterling, the Company used exchange rates of $1.209/£ and $1.356/£ to translate the net pension liability into U.S. dollars at December 31, 2022 and December 25, 2021, respectively. The PBO was $435,711 at December 31, 2022. The net funded status of $24,216 at December 31, 2022 is recorded as a noncurrent asset reflecting, in part, a significant actuarial gain for the period from December 25, 2021 to December 31, 2022 attributed to an increase in the discount rate. Projected Benefit Obligation and Fair Value of Plan Assets As there are no active employees in the plan, the ABO is equal to the PBO for all years presented. The overfunded ABO represents the difference between the PBO and the fair value of plan assets. (19) DEFINED BENEFIT RETIREMENT PLAN – CONTINUED Changes in the PBO and fair value of plan assets for the pension plan for the period from December 26, 2020 to December 25, 2021 were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Projected ​ ​ ​ ​ ​ ​ Benefit ​ Plan ​ Funded ​ ​ Obligation ​ Assets ​ status Fair Value at December 26, 2020 ​ $ 860,173 ​ $ 741,650 ​ $ (118,523) Employer contributions ​ ​ — ​ ​ 1,924 ​ ​ Interest cost ​ 9,896 ​ — ​ Actual return on plan assets ​ — ​ 48,637 ​ Benefits paid ​ (22,952) ​ (22,952) ​ Actuarial gain ​ (77,379) ​ — ​ Currency translation ​ (8,032) ​ (8,089) ​ Fair Value at December 25, 2021 ​ $ 761,706 ​ $ 761,170 ​ $ (536) ​ Changes in the PBO and fair value of plan assets for the pension plan for the period from December 25, 2021 to December 31, 2022 were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Projected ​ ​ ​ ​ ​ ​ Benefit ​ Plan ​ Funded ​ ​ Obligation ​ Assets ​ status Fair Value at December 25, 2021 ​ $ 761,706 ​ $ 761,170 ​ $ (536) Employer contributions ​ ​ — ​ ​ 17,155 ​ ​ Interest cost ​ 12,551 ​ — ​ Actual return on plan assets ​ — ​ (228,493) ​ Benefits paid ​ (20,175) ​ (20,175) ​ Actuarial gain ​ (248,252) ​ — ​ Currency translation ​ (70,119) ​ (69,730) ​ Fair Value at December 31, 2022 ​ $ 435,711 ​ $ 459,927 ​ $ 24,216 ​ Actuarial gain decreased the projected benefit obligation resulted from an increase in the discount rate to 4.80% in 2022 versus 1.90%. Pre-tax amounts recognized in accumulated other comprehensive income (loss) as of December 31, 2022 and December 25, 2021 consisted of actuarial gains (losses): ​ ​ ​ ​ Balance December 26, 2020 $ (165,258) Actuarial gain ​ 102,529 Prior service costs amortization ​ 550 Currency translation gain ​ 1,239 Balance December 25, 2021 ​ (60,940) Actuarial loss ​ (2,915) Prior service costs amortization ​ 493 Currency translation gain ​ 5,451 Balance December 31, 2022 ​ $ (57,911) ​ Assumptions ​ ​ ​ ​ ​ ​ ​ ​ Percentages 2022 2021 Discount rate 4.80 % ​ 1.90 % Salary increase N/A ​ N/A ​ CPI inflation 2.35 % ​ 2.70 % RPI inflation 3.25 % ​ 3.30 % ​ (19) DEFINED BENEFIT RETIREMENT PLAN – CONTINUED Expense/(Benefit) Pension benefit is determined based upon the annual service cost of benefits (the actuarial cost of benefits earned during a period) and the interest cost on those liabilities, less the expected return on plan assets. The interest cost component is calculated using the full yield curve approach to estimate the interest cost by applying the specific spot rates along the yield curve used to determine the present value of the benefit plan obligations to relevant cash outflows for the corresponding year. The expected long-term rate of return on plan assets is applied to the fair value of plan assets. Differences in actual experience in relation to assumptions are not recognized in net earnings immediately, but are deferred and, if necessary, amortized as pension expense. ​ The components of the net periodic pension benefit for the fiscal years ended December 31, 2022 and December 25, 2021 were as follows: ​ ​ ​ ​ ​ ​ ​ Net periodic (benefit) expense: ​ 2022 2021 Interest cost ​ $ 12,551 ​ $ 9,896 Expected return on plan assets ​ (23,131) ​ (27,763) Amortization of prior service cost ​ 493 ​ 550 Amortization of actuarial loss ​ — ​ 2,750 Net periodic benefit ​ $ (10,087) ​ $ (14,567) ​ Assumptions ​ ​ ​ ​ ​ ​ ​ ​ Percentages 2022 ​ 2021 Discount rate for benefit obligations 1.90 % ​ 1.40 % Discount rate for interest cost ​ 1.80 % ​ 1.15 % Expected return on plan assets 3.48 % ​ 3.96 % CPI Inflation 2.70 % ​ 2.00 % RPI Inflation 3.30 % ​ 2.90 % ​ The discount rate is based on the yields of AA-rated corporate bonds with durational periods similar to that of the pension liabilities. The expected return on plan assets is based on the asset allocation mix and the historical return, taking into account current and expected market conditions. The expected return of plan assets decreased from 3.96% to 3.48% for 2022 as the investment composition has more liability matching versus return seeking assets. Inflation is based on expected changes in the consumer price index or the retail price index in the U.K. depending on the relevant plan provisions. Cash Contributions The Company completed negotiations with Plan trustees in 2022 regarding annual funding for the Plan. The annual contributions into the Plan are $16,000 (/£13,100) per annum as part of the Plan’s recovery plan, along with a contribution to cover the administrative costs of the Plan of approximately $1,600 (/£1,300) per annum. In December 2020, the Company made its required 2021 annual contribution in addition to the required 2020 annual contribution that was made earlier in fiscal 2020. Benefit Payments The following table details expected pension benefit payments for the years 2023 through 2032: ​ ​ ​ ​ 2023 $ 20,432 2024 ​ 21,036 2025 ​ 21,641 2026 ​ 22,366 2027 ​ 22,970 Years 2028 - 2032 ​ 125,733 ​ ​ (19) DEFINED BENEFIT RETIREMENT PLAN – CONTINUED Asset Allocation Strategy The investment strategy for pension plan assets is to maintain a diversified portfolio consisting of ● Long-term fixed ‑ income securities that are investment grade or government ‑ backed in nature; ● Common stock mutual funds in U.K. and non-U.K. companies, and ● Diversified growth funds, which are invested in a number of investments, including common stock, fixed income funds, properties and commodities. The Plan, as required by U.K. law, has an independent trustee that sets investment policy. The general strategy is to invest approximately 50% of the assets of the plan in common stock mutual funds and diversified growth funds, with the remainder of the investments in long-term fixed income securities, including corporate bonds and index-linked U.K. gilts. The trustees regularly consult with representatives of the plan sponsor and independent advisors on such matters. The pension plan investments are held in a trust. The weighted‑average maturity of the corporate bond portfolio was 13 years at December 31, 2022. Fair Value Measurements The pension plan assets are valued at fair value. The following is a description of the valuation methodologies used for the investments measured at fair value, including the general classification of such instruments pursuant to the valuation hierarchy. Leveraged Inflation-Linked Gilts (“LDIs”) Temporary Cash Investments Corporate Bonds Corporate Stock Secured Income Asset (“SIA”) Funds (19) DEFINED BENEFIT RETIREMENT PLAN – CONTINUED At December 31, 2022 and December 25, 2021, the pension plan assets measured at fair value on a recurring basis were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Quoted Prices in Significant Other Significant ​ ​ ​ ​ Active Markets ​ Observable ​ Unobservable ​ ​ ​ ​ ​ for Identical ​ Inputs ​ Inputs ​ ​ ​ December 31, 2022 ​ Inputs (Level 1) ​ (Level 2) ​ (Level 3) ​ Total Plan assets at fair value: ​ ​ ​ ​ Temporary cash investments ​ $ 5,916 ​ $ — ​ $ — ​ $ 5,916 Total plan net assets at fair value ​ $ 5,916 ​ $ — ​ $ — ​ $ 5,916 Plan assets at NAV: ​ ​ ​ ​ Leveraged inflation-linked gilt funds ​ ​ ​ ​ ​ ​ 206,555 Corporate bonds ​ ​ ​ ​ ​ ​ 63,953 Corporate stock ​ ​ ​ ​ ​ ​ 55,379 Secured income asset funds ​ ​ ​ ​ ​ ​ 128,124 Total plan assets at NAV ​ ​ ​ ​ ​ ​ 454,011 Total plan assets ​ ​ ​ ​ ​ ​ $ 459,927 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Quoted Prices in Significant Other Significant ​ ​ ​ ​ Active Markets ​ Observable ​ Unobservable ​ ​ ​ ​ ​ for Identical ​ Inputs ​ Inputs ​ ​ ​ December 25, 2021 ​ Inputs (Level 1) ​ (Level 2) ​ ​ (Level 3) ​ Total Plan assets at fair value: ​ ​ ​ ​ Temporary cash investments ​ $ 14,000 ​ $ — ​ $ — ​ $ 14,000 Total plan net assets at fair value ​ $ 14,000 ​ $ — ​ $ — ​ $ 14,000 Plan assets at NAV: ​ ​ ​ ​ Leveraged inflation-linked gilt funds ​ ​ ​ ​ ​ ​ 283,288 Corporate bonds ​ ​ ​ ​ ​ ​ 107,945 Corporate stock ​ ​ ​ ​ ​ ​ 212,730 Secured income asset funds ​ ​ ​ ​ ​ ​ 143,207 Total plan assets at NAV ​ ​ ​ ​ ​ ​ 747,170 Total plan assets ​ ​ ​ ​ ​ ​ $ 761,170 ​

LEASES

LEASES	12 Months Ended
	Dec. 31, 2022
Leases [Abstract]
LEASES	(20) LEASES The Company has operating leases for plant locations, corporate offices, sales offices, and certain equipment. Outstanding leases at December 31, 2022 have remaining lease terms of one year to twenty-five years, some of which include options to extend leases for up to ten years. The Company does not have any financing leases. The Company elected practical expedients not to reassess whether existing contracts are or contain leases, to not reassess the lease classification of any existing leases, to not reassess initial direct costs for any existing leases, to use hindsight in determining the lease term and in assessing impairment of the right-of-use asset, and to not separate lease and non-lease components for all classes of underlying assets. The Company determines if an arrangement is a lease at inception. Operating leases are included in “Other assets”, “Other accrued expenses”, and “Operating lease liabilities” in the Consolidated Balance Sheets. ROU assets represent the right to use an underlying asset for the lease term and lease liabilities represent the obligation to make future lease payments arising from the lease. Operating lease ROU assets and liabilities are recognized at commencement date based on the present value of lease payments over the lease term. The Company used its collateralized incremental borrowing rate in determining the present value of future lease payments. The operating lease ROU asset also includes any lease payments made and excludes any lease incentives and impairments. Some of the Company’s facility leases include options to extend the lease when it is reasonably certain that the option will be exercised. Lease expense is recognized on a straight-line basis over the lease term. The Company commenced on a new corporate headquarters operating lease with straight-line annual expense of approximately $5,100, a 2% annual increase in lease payment, and a 25-year term during 2021. In recognition of this lease, an operating lease asset of $71,853 and an operating long-term liability of $71,196 was recognized. (20) LEASES – CONTINUED Lease cost and other information related to the Company’s operating leases at December 31, 2022 and December 25, 2021 are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fifty-three ​ Fifty-two ​ ​ ​ weeks ended ​ weeks ended ​ ​ ​ December 31, ​ December 25, ​ ​ 2022 ​ 2021 ​ Operating lease cost ​ $ 31,062 ​ ​ $ 27,421 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Operating cash outflows from operating leases ​ $ 33,150 ​ $ 27,793 ​ ROU assets obtained in exchange for lease obligations ​ $ 27,480 ​ $ 86,481 ​ Weighted average remaining lease term ​ 17 years ​ 17 years ​ Weighted average discount rate ​ 4.2 % ​ 4.0 % ​ ​ Operating lease cost includes approximately $1,600 for short-term lease costs and approximately $4,400 for variable lease payments in 2022. Supplemental balance sheet information related to operating leases as of December 31, 2022 and December 25, 2021 is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, December 25, ​ ​ Classification ​ 2022 ​ 2021 Operating lease assets Other assets ​ $ 162,930 ​ $ 152,664 ​ ​ ​ ​ ​ ​ ​ ​ ​ Operating lease short-term liabilities Other accrued expenses ​ 16,857 ​ 16,754 Operating lease long-term liabilities Operating lease liabilities ​ 155,469 ​ 147,759 Total lease liabilities ​ ​ ​ $ 172,326 ​ $ 164,513 ​ Minimum lease payments under operating leases expiring subsequent to December 31, 2022 are as follows: ​ ​ ​ ​ Fiscal year ending: ​ 2023 ​ $ 23,815 2024 ​ 20,689 2025 ​ 19,615 2026 ​ 17,333 2027 ​ 13,924 Subsequent ​ 147,767 Total minimum lease payments ​ $ 243,143 Less: Interest ​ $ 70,817 Present value of minimum lease payments ​ $ 172,326 ​ ​

BUSINESS SEGMENTS

BUSINESS SEGMENTS	12 Months Ended
	Dec. 31, 2022
Segment Reporting [Abstract]
BUSINESS SEGMENTS	(21) BUSINESS SEGMENTS During the first quarter of 2022, the Company’s CODM changed the Company’s management structure and began to manage the business, allocate resources, and evaluate performance based on the new structure. As a result, the Company has realigned to a two reportable segment structure organized by market dynamics (Infrastructure and Agriculture). Three operating segments resulted from the new management structure and two are aggregated into the Agriculture reportable segment. The Company considers gross profit margins, nature of products sold, nature of the production processes, type and class of customer, and methods used to distribute products when assessing aggregation of operating segments. The Infrastructure segment includes the previous reportable segments of Utility Support Structures, Engineered Support Structures, and Coatings. All prior period segment information has been recast to reflect this change in reportable segments. The Company has two reportable segments based on its management structure. Each segment is global in nature with a manager responsible for segment operational performance and the allocation of capital within the segment. Net corporate expense is net of certain service‑related expenses that are allocated to business units generally on the basis of employee headcounts and sales dollars. Reportable segments are as follows: INFRASTRUCTURE: AGRICULTURE: In addition to these two reportable segments, the Company had a business and related activities that is not more than 10% of consolidated sales, operating income or assets. This includes the offshore wind energy structures business and was reported in the “Other” segment until its divestiture in 2022. The accounting policies of the reportable segments are the same as those described in Note 1. The Company evaluates the performance of its business segments based upon operating income and invested capital. The Company’s operating income for segment purposes excludes unallocated corporate general and administrative expenses, interest expense, non-operating income and deductions, or income taxes. ​ (21) BUSINESS SEGMENTS – CONTINUED Summary by Business ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2022 ​ 2021 ​ 2020 SALES: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Infrastructure ​ ​ $ 2,928,419 ​ $ 2,372,100 ​ $ 2,141,741 Agriculture ​ ​ ​ 1,346,672 ​ ​ 1,028,717 ​ ​ 645,831 Other ​ ​ ​ 100,219 ​ ​ 123,001 ​ ​ 120,063 Total ​ ​ ​ 4,375,310 ​ ​ 3,523,818 ​ ​ 2,907,635 INTERSEGMENT SALES: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Infrastructure ​ ​ ​ (18,673) ​ ​ (10,576) ​ ​ (6,541) Agriculture ​ ​ ​ (11,387) ​ ​ (11,667) ​ ​ (5,739) Other ​ ​ ​ — ​ ​ — ​ ​ — Total ​ ​ ​ (30,060) ​ ​ (22,243) ​ ​ (12,280) NET SALES: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Infrastructure ​ ​ ​ 2,909,746 ​ ​ 2,361,524 ​ ​ 2,135,200 Agriculture ​ ​ ​ 1,335,285 ​ ​ 1,017,050 ​ ​ 640,092 Other ​ ​ ​ 100,219 ​ ​ 123,001 ​ ​ 120,063 Total ​ ​ $ 4,345,250 ​ $ 3,501,575 ​ $ 2,895,355 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ OPERATING INCOME (LOSS): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Infrastructure ​ ​ ​ 354,499 ​ ​ 273,598 ​ ​ 217,364 Agriculture ​ ​ ​ 179,263 ​ ​ 137,027 ​ ​ 83,046 Other ​ ​ ​ 2,259 ​ ​ (40,192) ​ ​ (8,192) Corporate ​ ​ ​ (102,772) ​ ​ (83,648) ​ ​ (66,265) Total ​ ​ $ 433,249 ​ $ 286,785 ​ $ 225,953 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fifty-three weeks ended December 31, 2022 ​ ​ Infrastructure Agriculture ​ Other Intersegment Sales Consolidated Geographical market: ​ ​ ​ ​ ​ ​ ​ North America ​ $ 2,234,339 ​ $ 766,929 ​ $ — ​ $ (26,248) ​ $ 2,975,020 International ​ 694,080 ​ 579,743 ​ 100,219 ​ (3,812) ​ 1,370,230 Total ​ $ 2,928,419 ​ $ 1,346,672 ​ $ 100,219 ​ $ (30,060) ​ $ 4,345,250 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Product line: ​ ​ ​ ​ ​ Transmission, Distribution, and Substation ​ $ 1,184,660 ​ $ — ​ $ — ​ $ — ​ $ 1,184,660 Lighting and Transportation ​ 940,462 ​ — ​ — ​ — ​ 940,462 Coatings ​ 356,707 ​ — ​ — ​ (15,327) ​ 341,380 Telecommunications ​ 320,342 ​ — ​ — ​ — ​ 320,342 Renewable Energy ​ 126,248 ​ — ​ 100,219 ​ (3,346) ​ 223,121 Irrigation Equipment and Parts, excluding Technology ​ — ​ 1,231,587 ​ — ​ (11,387) ​ 1,220,200 Technology Products and Services ​ — ​ 115,085 ​ — ​ — ​ 115,085 Total ​ $ 2,928,419 ​ $ 1,346,672 ​ $ 100,219 ​ $ (30,060) ​ $ 4,345,250 ​ (21) BUSINESS SEGMENTS – CONTINUED ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fifty-two weeks ended December 25, 2021 ​ ​ Infrastructure Agriculture ​ Other Intersegment Sales Consolidated Geographical market: ​ ​ ​ ​ ​ ​ ​ North America ​ $ 1,724,531 ​ $ 545,574 ​ $ — ​ $ (22,243) ​ $ 2,247,862 International ​ 647,569 ​ 483,143 ​ 123,001 ​ — ​ 1,253,713 Total ​ $ 2,372,100 ​ $ 1,028,717 ​ $ 123,001 ​ $ (22,243) ​ $ 3,501,575 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Product line: ​ ​ ​ ​ ​ Transmission, Distribution, and Substation ​ $ 935,099 ​ $ — ​ $ — ​ $ — ​ $ 935,099 Lighting and Transportation ​ 825,923 ​ — ​ — ​ — ​ 825,923 Coatings ​ 309,647 ​ — ​ — ​ (10,575) ​ 299,072 Telecommunications ​ 238,527 ​ — ​ — ​ — ​ 238,527 Renewable Energy ​ 62,904 ​ — ​ 123,001 ​ — ​ 185,905 Irrigation Equipment and Parts, excluding Technology ​ — ​ 930,858 ​ — ​ (11,668) ​ 919,190 Technology Products and Services ​ — ​ 97,859 ​ — ​ — ​ 97,859 Total ​ $ 2,372,100 ​ $ 1,028,717 ​ $ 123,001 ​ $ (22,243) ​ $ 3,501,575 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fifty-two weeks ended December 26, 2020 ​ ​ Infrastructure Agriculture ​ Other Intersegment Sales Consolidated Geographical market: ​ ​ ​ ​ ​ ​ ​ North America ​ $ 1,574,802 ​ $ 378,424 ​ $ — ​ $ (12,280) ​ $ 1,940,946 International ​ 566,939 ​ 267,407 ​ 120,063 ​ — ​ 954,409 Total ​ $ 2,141,741 ​ $ 645,831 ​ $ 120,063 ​ $ (12,280) ​ $ 2,895,355 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Product line: ​ ​ ​ ​ ​ Transmission, Distribution, and Substation ​ $ 795,693 ​ $ — ​ $ — ​ $ — ​ $ 795,693 Lighting and Transportation ​ 797,335 ​ — ​ — ​ — ​ 797,335 Coatings ​ 276,087 ​ — ​ — ​ (6,541) ​ 269,546 Telecommunications ​ 186,244 ​ — ​ — ​ — ​ 186,244 Renewable Energy ​ 86,382 ​ — ​ 120,063 ​ — ​ 206,445 Irrigation Equipment and Parts, excluding Technology ​ — ​ 578,686 ​ — ​ (5,739) ​ 572,947 Technology Products and Services ​ — ​ 67,145 ​ — ​ — ​ 67,145 Total ​ $ 2,141,741 ​ $ 645,831 ​ $ 120,063 ​ $ (12,280) ​ $ 2,895,355 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2022 2021 2020 OPERATING INCOME (LOSS): ​ ​ ​ ​ ​ ​ ​ ​ ​ Infrastructure ​ $ 354,499 ​ $ 273,598 ​ $ 217,364 Agriculture ​ 179,263 ​ 137,027 ​ 83,046 Other ​ ​ 2,259 ​ ​ (40,192) ​ ​ (8,192) Corporate ​ (102,772) ​ (83,648) ​ (66,265) Total ​ 433,249 ​ 286,785 ​ 225,953 Interest expense, net ​ (45,519) ​ (41,420) ​ (38,701) Loss from divestiture of wind energy structures business ​ ​ (33,273) ​ — ​ — Other ​ 9,431 ​ 14,718 ​ 5,516 Earnings before income taxes and equity in earnings of nonconsolidated subsidiaries ​ $ 363,888 ​ $ 260,083 ​ $ 192,768 ​ (21) BUSINESS SEGMENTS – CONTINUED ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2022 2021 2020 TOTAL ASSETS: ​ ​ ​ Infrastructure ​ $ 2,267,800 ​ $ 2,102,851 ​ $ 1,933,970 Agriculture ​ 1,112,588 ​ 1,027,272 ​ 465,322 Other ​ ​ — ​ ​ 67,592 ​ ​ 137,316 Corporate ​ 176,608 ​ 249,534 ​ 416,552 Total ​ $ 3,556,996 ​ $ 3,447,249 ​ $ 2,953,160 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2022 2021 2020 CAPITAL EXPENDITURES: ​ ​ ​ ​ ​ ​ ​ ​ ​ Infrastructure $ 53,228 $ 72,129 $ 81,074 Agriculture ​ 32,886 ​ 17,509 ​ 16,740 Other ​ ​ — ​ ​ 345 ​ ​ — Corporate ​ 7,174 ​ 17,807 ​ 8,886 Total ​ $ 93,288 ​ $ 107,790 ​ $ 106,700 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2022 2021 2020 DEPRECIATION AND AMORTIZATION: ​ ​ ​ ​ ​ ​ ​ ​ ​ Infrastructure ​ $ 62,398 ​ $ 59,748 ​ $ 58,985 Agriculture ​ 23,681 ​ 17,813 ​ 12,098 Other ​ ​ 1,393 ​ ​ 5,988 ​ ​ 5,848 Corporate ​ 9,695 ​ 9,028 ​ 5,961 Total ​ $ 97,167 ​ $ 92,577 ​ $ 82,892 ​ Summary by Geographical Area by Location of Valmont Facilities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2022 2021 2020 NET SALES: ​ ​ ​ ​ ​ ​ ​ ​ ​ United States ​ $ 2,965,673 ​ $ 2,260,198 ​ $ 1,919,136 Australia ​ 292,072 ​ 297,720 ​ 252,253 Brazil ​ 354,497 ​ 200,402 ​ 103,591 Denmark ​ 100,219 ​ 123,001 ​ 120,063 Other ​ 632,789 ​ 620,254 ​ 500,312 Total ​ $ 4,345,250 ​ $ 3,501,575 ​ $ 2,895,355 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ LONG-LIVED ASSETS: ​ ​ ​ United States ​ $ 1,246,956 ​ $ 1,172,552 ​ $ 748,886 Australia ​ 82,290 ​ 173,240 ​ 179,673 Brazil ​ 42,259 ​ 28,583 ​ 17,151 Denmark ​ — ​ 21,232 ​ 61,546 Other ​ 404,906 ​ 338,879 ​ 391,279 Total ​ $ 1,776,411 ​ $ 1,734,486 ​ $ 1,398,535 ​ No single customer accounted for more than 10% of net sales in 2022, 2021, or 2020. Net sales by geographical area are based on the location of the facility producing the sales and do not include sales to other operating units of the Company. Brazil and Australia accounted for approximately 8% and 7% of the Company’s net sales in 2022, respectively; no other foreign country accounted for more than 3% of the Company’s net sales. Operating income by business segment are based on net sales less identifiable operating expenses and allocations and includes profits recorded on sales to other operating units of the Company. Long-lived assets consist of property, plant, and equipment, net of depreciation, goodwill, other intangible assets, and other assets. Long-lived assets by geographical area are based on location of facilities.

SUMMARY OF SIGNIFICANT ACCOUN_2

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	12 Months Ended
	Dec. 31, 2022
Accounting Policies [Abstract]
Principles of Consolidation	Principles of Consolidation The consolidated financial statements include the accounts of Valmont Industries, Inc. and its wholly and majority‑owned subsidiaries (the “Company”). Investments in 20% to 50% owned affiliates and joint ventures are accounted for by the equity method. Investments in less than 20% owned affiliates are accounted for by the cost method. All intercompany items have been eliminated.
Cash Overdrafts	Cash Overdrafts Cash book overdrafts totaling $25,075 and $19,670 were classified as accounts payable at December 31, 2022 and December 25, 2021, respectively. The Company’s policy is to report the change in book overdrafts as an operating activity in the Consolidated Statements of Cash Flows.
Change in Reportable Segments	Change in Reportable Segments During the first quarter of 2022, the Company’s Chief Executive Officer, as the chief operating decision maker, made changes to the Company’s management structure and began to manage the business, allocate resources, and evaluate performance under the new structure. As a result, the Company has realigned its reportable segment structure. All prior period segment information has been recast to reflect this change in reportable segments. Refer to Note 21 for additional information. The Company has two reportable segments based on its management structure. Each segment is global in nature with a manager responsible for segment operational performance and allocation of capital within the segment. Reportable segments are as follows: INFRASTRUCTURE: This segment consists of the manufacture and distribution of products and solutions to serve the infrastructure markets of utility, renewable energy, lighting, transportation, and telecommunications, and coatings services to preserve metal products. AGRICULTURE: This segment consists of the manufacture of center pivot components and linear irrigation equipment for agricultural markets, including parts and tubular products, and advanced technology solutions for precision agriculture. In addition to these two reportable segments, the Company had a business and related activities that was not more than 10% of consolidated sales, operating income, or assets. This includes the offshore wind energy structures business and is reported in the “Other” segment until its divestiture in 2022.
Fiscal Year	Fiscal Year The Company operates on a 52 or 53 week fiscal year with each year ending on the last Saturday in December. Accordingly, the Company’s fiscal year ended December 31, 2022 consisted of 53 weeks and the Company’s fiscal years ended December 25, 2021 and December 26, 2020 consisted of 52 weeks. The estimated impact on the Company's results of operations due to the extra week in fiscal year 2022 was additional net sales of approximately $80,800 and additional net earnings of approximately $5,300.
Accounts Receivable	Accounts Receivable Accounts receivable are reported on the balance sheet net of any allowance for doubtful accounts. Allowances are maintained in amounts considered to be appropriate in relation to the outstanding receivables based on age of the receivable, economic conditions and customer credit quality. As the Company’s international business has grown, the exposure to potential losses in international markets has also increased. These exposures can be difficult to estimate, particularly in areas of political instability, with governments with which the Company has limited experience, or where there is a lack of transparency as to the current credit condition of governmental units. ​ (1) SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES – CONTINUED The following table details the balances of the allowance for doubtful receivables and changes therein: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance at Charged to Currency Deductions Balance at ​ ​ Beginning of ​ Profit and ​ Translation ​ from ​ Close of For periods ended: ​ Period ​ Loss ​ Adjustment ​ Reserves ​ Period December 31, 2022 ​ $ 18,050 ​ $ 4,237 ​ $ (522) ​ $ (875) ​ $ 20,890 December 25, 2021 ​ 15,952 ​ 3,379 ​ (339) ​ (942) ​ 18,050 December 26, 2020 ​ 9,548 ​ 7,957 ​ 260 ​ (1,813) ​ 15,952 ​ The Company sells trade accounts receivable at a discount under uncommitted trade accounts receivable sale programs to third party financial institutions without recourse. As these accounts receivable are sold without recourse, the Company does not retain the associated risks following the transfer of such accounts receivable to the financial institutions. Transfers of accounts receivable are accounted for as sales and, accordingly, accounts receivables sold are excluded from “Receivables, less allowance” on the Consolidated Balance Sheets and cash proceeds are reflected in “Cash flows from operating activities” on the Consolidated Statements of Cash Flows. The difference between the carrying amount of the trade accounts receivables sold and the cash received, or discount, is recorded in “Other” expenses on the Consolidated Statements of Earnings. At December 31, 2022 and December 25, 2021, the Company sold trade accounts receivable of $100.0 million and $25.4 million, respectively. The fees associated with trade accounts receivables sold are immaterial.
Inventories	Inventories Inventory is valued at the lower of cost, determined on the first-in, first-out (“FIFO”) method, or net realizable value. Finished goods and manufactured goods inventories include the costs of acquired raw materials and related factory labor and overhead charges required to convert raw materials to manufactured and finished goods.
Long-Lived Assets	Long-Lived Assets Property, plant, and equipment are recorded at historical cost. The Company generally uses the straight-line method in computing depreciation and amortization for financial reporting purposes and accelerated methods for income tax purposes. The annual provisions for depreciation and amortization have been computed principally in accordance with the following ranges of asset lives: buildings and improvements 15 to 40 years, machinery and equipment 3 to 12 years, transportation equipment 3 to 24 years, office furniture and equipment 3 to 7 years, and intangible assets 5 to 20 years. Depreciation expense in fiscal 2022, 2021, and 2020 was $73,938, $70,223, and $63,890, respectively. An impairment loss is recognized if the carrying amount of an asset may not be recoverable and exceeds estimated future undiscounted cash flows of the asset. A recognized impairment loss reduces the carrying amount of the asset to its estimated fair value. The Company recognized a pre-tax $27,900 impairment of long-lived assets (property, plant, and equipment, customer relationship intangible asset, and trade name) in 2021 when it determined that its offshore wind energy business reporting unit would not generate sufficient cash flows to recover the carrying values. An impairment test was required in November 2021 when the Company received clarifying information on the competitive environment of this reporting unit in Europe. Impairment losses were recorded in 2020 as facilities were closed and future plans for certain fixed assets changed in connection with the Company’s restructuring plans. The Company evaluates its reporting units for impairment of goodwill during the third fiscal quarter of each year, or when events or changes in circumstances indicate the carrying value may not be recoverable. Reporting units are evaluated using after-tax operating cash flows (less capital expenditures) discounted to present value (“discounted cash flows”). For the solar tracking reporting unit, the Company valued this reporting unit using a blend of the discounted cash flows and multiple of earnings before interest, taxes, depreciation, and amortization (“EBITDA”) approach. Indefinite‑lived intangible assets are assessed separately from goodwill as part of the annual impairment testing, using a relief-from-royalty method. If the underlying assumptions related to the valuation of a reporting unit’s goodwill or an indefinite‑lived intangible asset change materially before or after the annual impairment testing, the reporting unit or asset is evaluated for potential impairment. In these evaluations, management considers recent operating performance, expected future performance, industry conditions, and other indicators of potential impairment. See footnote 8 for details of impairments recognized during 2021.
Leases	Leases The Company's operating leases are included in “Other assets” and “Operating lease liabilities” in the Consolidated Balance Sheets.
Income Taxes	Income Taxes The Company uses the asset and liability method to calculate deferred income taxes. Deferred tax assets and liabilities are recognized on temporary differences between financial statement and tax bases of assets and liabilities using enacted tax rates. The effect of tax rate changes on deferred tax assets and liabilities is recognized in income during the period that includes the enactment date.
Warranties	Warranties The Company’s provision for product warranty reflects management’s best estimate of probable liability under its product warranties. Estimated future warranty costs are recorded at the time a sale is recognized. Future warranty liability is determined based on applying historical claim rate experience to units sold that are still within the warranty period. In addition, the Company records provisions for known warranty claims.
Pension Benefits	Pension Benefits Certain expenses are incurred in connection with a defined benefit pension plan. In order to measure expense and the related benefit obligation, various assumptions are made including discount rates used to value the obligation, expected return on plan assets used to fund these expenses, and estimated future inflation rates. These assumptions are based on historical experience as well as current facts and circumstances. An actuarial analysis is used to measure the expense and liability associated with pension benefits.
Stock Plans	Stock Plans The Company maintains stock-based compensation plans approved by the shareholders, which provide that the Human Resource Committee of the Board of Directors may grant incentive stock options, nonqualified stock options, stock appreciation rights, restricted stock awards, restricted stock units, and bonuses of common stock.
Fair Value	Fair Value The Company applies the provisions of Accounting Standards Codification 820, Fair Value Measurement
Derivative Instrument	Derivative Instruments The Company may enter into derivative financial instruments to manage risk associated with fluctuation in interest rates, foreign currency rates, or commodities. Where applicable, the Company may elect to account for such derivatives as either a cash flow, fair value, or net investment hedge. (1) SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES – CONTINUED
Comprehensive Income	Comprehensive Income (Loss) Comprehensive income (loss) includes net earnings, currency translation adjustments, certain derivative-related activity, and changes in net actuarial gains / losses from a pension plan. Results of operations for foreign subsidiaries are translated using the average exchange rates during the period. Assets and liabilities are translated at the exchange rates in effect on the balance sheet dates. The components of accumulated other comprehensive income (loss) consisted of the following: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Foreign ​ ​ ​ ​ Accumulated ​ ​ Currency ​ ​ ​ Defined ​ Other ​ ​ Translation ​ Hedging ​ Benefit ​ Comprehensive ​ ​ Adjustments ​ Activities ​ Pension Plan ​ Income (Loss) Balance at December 25, 2021 ​ $ (243,350) ​ $ 15,777 ​ $ (35,554) ​ $ (263,127) Current period comprehensive income (loss) ​ (43,426) ​ 7,942 ​ 1,345 ​ (34,139) Divestiture of offshore wind energy structures business ​ ​ 25,977 ​ ​ (3,620) ​ ​ — ​ ​ 22,357 Balance at December 31, 2022 ​ $ (260,799) ​ $ 20,099 ​ $ (34,209) ​ $ (274,909) ​
Revenue Recognition	Revenue Recognition The Company determines the appropriate revenue recognition for contracts by analyzing the type, terms, and conditions of each contract or arrangement with a customer. Contracts with customers for all businesses are fixed-price with sales tax excluded from revenue and do not include variable consideration. Discounts included in contracts with customers, typically early pay discounts, are recorded as a reduction of net sales in the period in which the sale is recognized. Contract revenues are classified as product sales when the performance obligation is related to the manufacturing of goods. Contract revenues are classified as service sales when the performance obligation is the performance of a service. Service revenue is primarily related to the Coatings and Technology Products and Services product lines. Customer acceptance provisions exist primarily in the design stage of products (on a limited basis, the Company may agree to other acceptance terms), and acceptance of the design by the customer is required before the project is manufactured and delivered to the customer. The Company is not entitled to any compensation solely based on design of the product and does not recognize this service as a separate performance obligation and, therefore, no revenue is recognized with the design stage. No general rights of return exist for customers once the product has been delivered and the Company establishes provisions for estimated warranties. The Company does not sell extended warranties for any of its products. Shipping and handling costs associated with sales are recorded as costs of goods sold. The Company elected to use the practical expedient of treating freight as a fulfillment obligation instead of a separate performance obligation and ratably recognize freight expense as the structure is being manufactured, when the revenue from the associated customer contract is being recognized over time. With the exception of the transmission, distribution, and substation structures ("TD&S") product line, the renewable energy product line, and the telecommunication structures product line, the Company’s inventory is interchangeable for a variety of each segment’s customers. The Company has elected to not disclose the partially satisfied performance obligation at the end of the period when the contract has an original expected duration of one year or less. In addition, the Company does not adjust the amount of consideration to be received in a contract for any significant financing component if payment is expected within twelve months of transfer of control of goods or services. The Company’s contract assets as of December 31, 2022 and December 25, 2021 totaled $174,539 and $142,643, respectively. While most of the Infrastructure segment customers are generally invoiced upon shipment or delivery of the goods to the customer’s specified location, certain customers are also invoiced by advanced billings or progress billings. At December 31, 2022 and December 25, 2021, total contract liabilities were $178,531 and $213,203, respectively. At December 31, 2022, $172,915 was recorded as contract liabilities and $5,616 was recorded as other noncurrent liabilities on the consolidated balance sheets. Additional details are as follows: ​ (1) SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES – CONTINUED ● During the fiscal year ended December 31, 2022 and December 25, 2021, the Company recognized $96,373 and $105,406 of revenue that was included in the total contract liability as of December 25, 2021 and December 26, 2020, respectively. The revenue recognized was due to applying advance payments received for performance obligations completed during the period. ● At December 31, 2022, the Company had $11,080 of remaining performance obligations on contracts with an original expected duration of one year or more and expects to complete the remaining performance obligations on these contracts within the next 12 to 24 months . Segment and Product Line Revenue Recognition Infrastructure Segment Steel and concrete utility structures within the TD&S product lines are engineered to customer specifications resulting in limited ability to sell the structure to a different customer if an order is canceled after production commences. The continuous transfer of control to the customer is evidenced either by contractual termination clauses or by rights to payment for work performed to-date plus a reasonable profit as the products do not have an alternative use to the Company. Since control is transferring over time, revenue is recognized based on the extent of progress towards completion of the performance obligation. The selection of the method to measure progress towards completion requires judgment. For the TD&S and telecommunication structure product lines, the Company generally recognizes revenue on an inputs basis, using total production hours incurred to-date for each order as a percentage of total hours estimated to produce the order. The completion percentage is applied to the order’s total revenue and total estimated costs to determine reported revenue, cost of goods sold, and gross profit. Production of an order, once started, is typically completed within three months. Depending on the product sold, revenue from renewable energy is recognized both upon shipment or delivery of goods to the customer depending on contract terms, or by using an inputs method, based on the ratio of costs incurred to-date to the total estimated costs at completion of the performance obligation. External sales agents are used in certain TD&S sales and the Company has chosen to expense estimated commissions owed to third parties by recognizing them proportionately as the goods are manufactured. For the structures sold for lighting and transportation and for the majority of telecommunication products, revenue is recognized upon shipment or delivery of goods to the customer depending on contract terms, which is the same point in time that the customer is billed. There are also large regional customers who have unique product specifications for telecommunication structures. When the customer contract includes a cancellation clause that would require them to pay for work completed plus a reasonable margin if an order was canceled, revenue is recognized over time based on hours worked as a percent of total estimated hours to complete production. The Coatings product line revenues are derived by providing coating services to customers’ products, which include galvanizing, anodizing, and powder coating. Revenue is recognized once the coating service has been performed and the goods are ready to be picked up or delivered to the customer which is the same time that the customer is billed. Agriculture Segment Revenue recognition from the manufacture of irrigation equipment and related parts and services (including tubular products for industrial customers) is generally upon shipment of the goods to the customer which is the same point in time that the customer is billed. The remote monitoring subscription services recognized as part of technology services product line are primarily billed annually and revenue is recognized on a straight-line basis over the subsequent twelve months (contract terms). (1) SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES – CONTINUED Disaggregation of revenue by product line is disclosed in the “Business Segments” footnote. A breakdown by segment of revenue recognized over time and revenue recognized at a point in time for the fiscal years ended December 31, 2022 and December 25, 2021 is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fiscal Year 2022 ​ Fiscal Year 2021 ​ Fiscal Year 2020 ​ ​ Point in ​ Over ​ Point in ​ Over ​ Point in ​ Over ​ Time Time Time Time Time Time Infrastructure ​ $ 1,687,458 ​ $ 1,222,288 ​ $ 1,388,297 ​ $ 973,227 ​ $ 1,296,497 ​ $ 838,703 Agriculture ​ 1,307,681 ​ 27,604 ​ 996,278 ​ 20,772 ​ 624,831 ​ 15,261 Other ​ ​ — ​ ​ 100,219 ​ ​ — ​ ​ 123,001 ​ ​ — ​ ​ 120,063 Total ​ $ 2,995,139 ​ $ 1,350,111 ​ $ 2,384,575 ​ $ 1,117,000 ​ $ 1,921,328 ​ $ 974,027 ​
Use of Estimates	Use of Estimates Management of the Company has made a number of estimates and assumptions relating to the reporting of assets and liabilities, the reported amounts of revenue and expenses, and the disclosure of contingent assets and liabilities to prepare these financial statements in conformity with generally accepted accounting principles. Actual results could differ from those estimates.
Equity Method Investments	Equity Method Investments The Company has equity method investments in non-consolidated subsidiaries which are recorded within “Other assets” on the Consolidated Balance Sheets.
Treasury Stock	Treasury Stock Repurchased shares are recorded as “Cost of treasury stock” and result in a reduction of “Shareholders’ equity.” When treasury shares are reissued, the Company uses the last-in, first-out method, and the difference between the repurchase cost and re-issuance price is charged or credited to “Additional paid-in capital”. In May 2014, the Company announced a capital allocation philosophy which covered a share repurchase program. Specifically, the Board of Directors at that time authorized the purchase of up to $500,000 of the Company’s outstanding common stock from time to time over twelve months at prevailing market prices, through open market or privately-negotiated transactions. In February 2015 and again in October 2018, the Board of Directors authorized an additional purchase of up to $250,000 of the Company’s outstanding common stock with no stated expiration date. As of December 31, 2022, the Company has acquired 6,613,018 shares for approximately $918,600 under this share repurchase program. Subsequent to year end, on February 27, 2023, the Board of Directors increased the amount remaining under the program by an additional $400,000, with no stated expiration date.
Research and Development	Research and Development Research and development costs are charged to operations in the year incurred. These costs are a component of “Selling, general, and administrative expenses” on the Consolidated Statements of Earnings. Research and development expenses were approximately $46,000 in 2022, $37,000 in 2021, and $21,400 in 2020.
Recently Issued Accounting Pronouncements (not yet adopted)	Recently Adopted Accounting Pronouncements In March 2020, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update No. 2020-04 (ASU 2020-04), Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting Reference Rate Reform (Topic 848): Deferral of the Sunset Date of Topic 848 ​ (1) SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES – CONTINUED Recently Issued Accounting Pronouncements (Not Yet Adopted) In September 2022, the FASB issued Accounting Standards Update No. 2022-04 (ASU 2022-04), Liabilities - Supplier Finance Programs (Topic 450-50): Disclosure of Supplier Finance Program Obligations

SUMMARY OF SIGNIFICANT ACCOUN_3

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)	12 Months Ended
	Dec. 31, 2022
Accounting Policies [Abstract]
Schedule of Components of Accumulated Other Comprehensive Income (Loss)	The components of accumulated other comprehensive income (loss) consisted of the following: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Foreign ​ ​ ​ ​ Accumulated ​ ​ Currency ​ ​ ​ Defined ​ Other ​ ​ Translation ​ Hedging ​ Benefit ​ Comprehensive ​ ​ Adjustments ​ Activities ​ Pension Plan ​ Income (Loss) Balance at December 25, 2021 ​ $ (243,350) ​ $ 15,777 ​ $ (35,554) ​ $ (263,127) Current period comprehensive income (loss) ​ (43,426) ​ 7,942 ​ 1,345 ​ (34,139) Divestiture of offshore wind energy structures business ​ ​ 25,977 ​ ​ (3,620) ​ ​ — ​ ​ 22,357 Balance at December 31, 2022 ​ $ (260,799) ​ $ 20,099 ​ $ (34,209) ​ $ (274,909) ​
Schedule of Disaggregation of Revenue	Disaggregation of revenue by product line is disclosed in the “Business Segments” footnote. A breakdown by segment of revenue recognized over time and revenue recognized at a point in time for the fiscal years ended December 31, 2022 and December 25, 2021 is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fiscal Year 2022 ​ Fiscal Year 2021 ​ Fiscal Year 2020 ​ ​ Point in ​ Over ​ Point in ​ Over ​ Point in ​ Over ​ Time Time Time Time Time Time Infrastructure ​ $ 1,687,458 ​ $ 1,222,288 ​ $ 1,388,297 ​ $ 973,227 ​ $ 1,296,497 ​ $ 838,703 Agriculture ​ 1,307,681 ​ 27,604 ​ 996,278 ​ 20,772 ​ 624,831 ​ 15,261 Other ​ ​ — ​ ​ 100,219 ​ ​ — ​ ​ 123,001 ​ ​ — ​ ​ 120,063 Total ​ $ 2,995,139 ​ $ 1,350,111 ​ $ 2,384,575 ​ $ 1,117,000 ​ $ 1,921,328 ​ $ 974,027 ​
Accounts Receivable, Allowance for Credit Loss	(1) SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES – CONTINUED The following table details the balances of the allowance for doubtful receivables and changes therein: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance at Charged to Currency Deductions Balance at ​ ​ Beginning of ​ Profit and ​ Translation ​ from ​ Close of For periods ended: ​ Period ​ Loss ​ Adjustment ​ Reserves ​ Period December 31, 2022 ​ $ 18,050 ​ $ 4,237 ​ $ (522) ​ $ (875) ​ $ 20,890 December 25, 2021 ​ 15,952 ​ 3,379 ​ (339) ​ (942) ​ 18,050 December 26, 2020 ​ 9,548 ​ 7,957 ​ 260 ​ (1,813) ​ 15,952 ​

ACQUISITIONS (Tables)

ACQUISITIONS (Tables)	12 Months Ended
	Dec. 31, 2022
Conceal Fab
Business Acquisition [Line Items]
Schedule of Business Acquisitions, by Acquisition	​ ​ ​ ​ ​ ​ As of June 1, ​ ​ 2022 Current assets ​ $ 21,133 Customer relationships ​ 26,200 Trade name ​ 5,000 Property, plant & equipment ​ 3,813 Other assets ​ 9,108 Goodwill ​ 42,465 Total fair value of assets acquired ​ $ 107,719 Current liabilities ​ 6,658 Long-term debt ​ 2,038 Operating lease liabilities ​ 7,812 Deferred taxes ​ 5,464 Other noncurrent liabilities ​ 12 Total fair value of liabilities assumed ​ $ 21,984 Non-controlling interest in consolidated subsidiaries ​ 41,693 Net assets acquired ​ $ 44,042 ​
Prospera
Business Acquisition [Line Items]
Schedule of Business Acquisitions, by Acquisition	​ ​ ​ ​ ​ ​ As of May 12, ​ ​ 2021 Current assets ​ $ 647 Developed technology ​ 32,900 Trade name ​ 2,850 Property, plant & equipment ​ 1,063 Goodwill ​ 273,453 Total fair value of assets acquired ​ $ 310,913 Current liabilities ​ 2,690 Deferred taxes ​ 8,223 Total fair value of liabilities assumed ​ $ 10,913 Net assets acquired ​ $ 300,000 ​

DIVESTITURES - Assets and liabi

DIVESTITURES - Assets and liabilities (Tables)	12 Months Ended
	Dec. 31, 2022
Discontinued Operations and Disposal Groups [Abstract]
Schedule of assets and liabilities, pre-tax loss from divestiture	​ ​ ​ ​ ​ Cash and cash equivalents ​ $ 12,420 Receivables, net ​ ​ 35,407 Inventories ​ 1,144 Contract assets ​ ​ 19,127 Prepaid expenses and other assets ​ ​ 1,852 Net property, plant, and equipment ​ 12,915 Intangible assets ​ ​ 5,579 Other assets ​ ​ 1,103 Total assets ​ $ 89,547 ​ ​ ​ ​ Accounts payable ​ $ 23,611 Contract liabilities ​ ​ 34,814 Accrued expenses ​ ​ 4,737 Deferred income taxes ​ ​ 1,375 Total liabilities ​ $ 64,537 ​ ​ ​ ​ Net assets ​ $ 25,010 ​ ​ ​ ​ ​ ​ Pre-tax loss from divestitures, before recognition of currency translation loss ​ $ 12,123 Recognition of cumulative currency translation loss and hedges (reclassified from OCI) ​ 21,150 Net pre-tax loss from divestiture of offshore wind energy structures business ​ $ 33,273 ​

RESTRUCTURING ACTIVITIES (Table

RESTRUCTURING ACTIVITIES (Tables)	12 Months Ended
	Dec. 31, 2022
Restructuring and Related Activities [Abstract]
Schedule of Restructuring Activities	The Company recorded the following pre-tax expenses: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Infrastructure ​ Agriculture ​ Other ​ Corporate ​ Total Severance ​ $ 1,139 ​ $ — ​ $ — ​ $ — ​ $ 1,139 Other cash restructuring expenses ​ 1,847 ​ — ​ — ​ — ​ 1,847 Impairments of fixed assets/net loss on disposals ​ 3,751 ​ — ​ — ​ — ​ 3,751 Total cost of sales ​ 6,737 ​ — ​ — ​ — ​ 6,737 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Severance ​ 7,873 ​ 2,968 ​ 1,192 ​ 1,761 ​ 13,794 Other cash restructuring expenses ​ 1,852 ​ — ​ 79 ​ 244 ​ 2,175 Impairments of assets / net loss on disposals ​ 349 ​ — ​ 94 ​ — ​ 443 Total selling, general and administrative expenses ​ 10,074 ​ 2,968 ​ 1,365 ​ 2,005 ​ 16,412 Consolidated total ​ $ 16,811 ​ $ 2,968 ​ $ 1,365 ​ $ 2,005 ​ $ 23,149

CASH FLOW SUPPLEMENTARY INFOR_2

CASH FLOW SUPPLEMENTARY INFORMATION (Tables)	12 Months Ended
	Dec. 31, 2022
Supplemental Cash Flow Elements [Abstract]
Schedule of Cash Payments For Interest And Income Taxes (Net of Refunds)	Cash payments for interest and income taxes (net of refunds) for the fifty-three weeks ended December 31, 2022 and the fifty-two weeks ended December 25, 2021 and December 26, 2020 were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2022 2021 2020 Interest ​ ​ $ 46,653 ​ $ 41,159 ​ $ 40,209 Income taxes ​ ​ 93,109 ​ 60,366 ​ 54,801 ​

INVENTORIES (Tables)

INVENTORIES (Tables)	12 Months Ended
	Dec. 31, 2022
Inventory Disclosure [Abstract]
Schedule of Components of Inventories	Inventories consisted of the following at December 31, 2022 and December 25, 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ December 25, ​ ​ 2022 2021 Raw materials and purchased parts ​ $ 258,814 ​ $ 278,107 Work-in-process ​ 44,453 ​ 63,628 Finished goods and manufactured goods ​ 425,495 ​ 387,099 ​ ​ $ 728,762 ​ $ 728,834

PROPERTY, PLANT AND EQUIPMENT (

PROPERTY, PLANT AND EQUIPMENT (Tables)	12 Months Ended
	Dec. 31, 2022
Property, Plant and Equipment [Abstract]
Schedule of Property, Plant And Equipment, at Cost	Property, plant, and equipment, at cost, consist of the following: ​ ​ ​ ​ ​ ​ ​ ​ 2022 2021 Land and improvements ​ $ 113,188 ​ $ 112,236 Buildings and improvements ​ 390,435 ​ 413,884 Machinery and equipment ​ 721,223 ​ 672,319 Transportation equipment ​ 30,610 ​ 27,020 Office furniture and equipment ​ 128,922 ​ 117,757 Construction in progress ​ 48,773 ​ 78,885 ​ ​ $ 1,433,151 ​ $ 1,422,101

GOODWILL AND INTANGIBLE ASSETS

GOODWILL AND INTANGIBLE ASSETS (Tables)	12 Months Ended
	Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Components of Amortized Intangible Assets	The components of amortized intangible assets at December 31, 2022 and December 25, 2021 were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2022 ​ ​ Gross ​ ​ ​ ​ Weighted ​ ​ Carrying ​ Accumulated ​ Average ​ Amount Amortization Life Customer Relationships ​ $ 222,716 ​ $ 145,502 ​ 13 years Patents & Proprietary Technology ​ 58,404 ​ 21,291 9 years Trade Name ​ 2,850 ​ 645 7 years Other ​ 2,462 ​ 2,164 5 years ​ ​ $ 286,432 ​ $ 169,602 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 25, 2021 ​ ​ Gross ​ ​ ​ ​ Weighted ​ ​ Carrying ​ Accumulated ​ Average ​ ​ Amount Amortization Life Customer Relationships ​ $ 224,597 ​ $ 160,626 ​ 13 years Patents & Proprietary Technology ​ 58,699 ​ 13,955 9 years Trade Name ​ ​ 2,850 ​ ​ 183 ​ 7 years Other ​ 4,534 ​ 3,959 6 years ​ ​ $ 290,680 ​ $ 178,723 ​ ​ ​
Schedule of Future Estimated Amortization Expense	(8) GOODWILL AND INTANGIBLE ASSETS – CONTINUED Estimated annual amortization expense related to finite‑lived intangible assets is as follows: ​ ​ ​ ​ ​ Estimated ​ ​ Amortization ​ ​ Expense 2023 ​ $ 20,825 2024 ​ 18,888 2025 ​ 17,454 2026 ​ 12,933 2027 ​ 9,695 ​
Schedule of Non-Amortized Intangible Assets	The carrying values of these trade names at December 31, 2022 and December 25, 2021 were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, December 25, Year ​ ​ 2022 ​ 2021 ​ Acquired Newmark ​ $ 11,111 ​ $ 11,111 2004 Convert Italia S.p.A. ​ 8,024 ​ 8,479 2018 Webforge ​ ​ 7,107 ​ ​ 7,877 ​ 2010 Ingal EPS / Ingal Civil Products ​ 6,891 ​ 7,637 2010 Valmont SM ​ — ​ 6,082 2014 ConcealFab ​ 5,000 ​ — 2022 Shakespeare ​ 4,000 ​ 4,000 2014 Walpar ​ 3,500 ​ 3,500 2018 Other ​ 14,152 ​ 14,721 Various ​ ​ $ 59,785 ​ $ 63,407 ​ ​ ​
Schedule of Carrying Amount of Goodwill	The carrying amount of goodwill by segment as of December 31, 2022 and December 25, 2021 was as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Infrastructure ​ Agriculture ​ Other ​ Total Gross balance at December 25, 2021 ​ $ 442,521 ​ $ 313,512 ​ $ 14,355 ​ $ 770,388 Accumulated impairment losses ​ (47,467) ​ — ​ (14,355) ​ (61,822) Balance at December 25, 2021 ​ 395,054 ​ 313,512 ​ — ​ $ 708,566 Acquisitions ​ 42,465 ​ — ​ — ​ 42,465 Foreign currency translation ​ (11,435) ​ 265 ​ — ​ (11,170) Balance at December 31, 2022 ​ $ 426,084 ​ $ 313,777 ​ $ — ​ $ 739,861 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Infrastructure ​ Agriculture ​ Other ​ Total Gross balance at December 26, 2020 ​ $ 447,612 ​ $ 30,177 ​ $ 14,355 ​ $ 492,144 Accumulated impairment losses ​ (47,467) ​ — ​ (14,355) ​ (61,822) Balance at December 26, 2020 ​ 400,145 ​ 30,177 ​ — ​ 430,322 Acquisitions ​ — ​ 284,253 ​ — ​ 284,253 Foreign currency translation ​ (5,091) ​ (918) ​ — ​ (6,009) Balance at December 25, 2021 ​ $ 395,054 ​ $ 313,512 ​ $ — ​ $ 708,566 ​

INCOME TAXES (Tables)

INCOME TAXES (Tables)	12 Months Ended
	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Schedule of Income Before Income Tax, Domestic and Foreign	Earnings before income taxes and equity in earnings of nonconsolidated subsidiaries are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2022 2021 2020 United States ​ $ 224,370 ​ $ 202,051 ​ $ 169,281 Foreign ​ 139,518 ​ 58,032 ​ 23,487 ​ ​ $ 363,888 ​ $ 260,083 ​ $ 192,768 ​
Schedule of Income Tax Expense (Benefit)	(10) INCOME TAXES – CONTINUED Income tax expense (benefit) consists of: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2022 2021 2020 Current: ​ ​ ​ Federal ​ $ 48,309 ​ $ 30,031 ​ $ 30,431 State ​ 11,888 ​ 8,891 ​ 8,302 Foreign ​ 48,273 ​ 20,644 ​ 12,730 ​ ​ 108,470 ​ 59,566 ​ 51,463 Non-current: ​ 1,442 ​ 1,777 ​ (451) Deferred: ​ ​ ​ Federal ​ (7,544) ​ 4,587 ​ (6,086) State ​ (1,973) ​ 558 ​ (822) Foreign ​ 8,292 ​ (5,074) ​ 5,511 ​ ​ (1,225) ​ 71 ​ (1,397) ​ ​ $ 108,687 ​ $ 61,414 ​ $ 49,615 ​
Schedule of Reconciliation of Statutory Federal Income Tax Rate and Effective Tax Rate	The reconciliations of the statutory federal income tax rate and the effective tax rate follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2022 ​ 2021 ​ 2020 Statutory federal income tax rate 21.0 % ​ 21.0 % ​ 21.0 % State income taxes, net of federal benefit 2.3 ​ 2.9 ​ 3.5 ​ Carryforwards, credits and changes in valuation allowances 1.0 ​ 1.5 ​ (1.6) ​ Foreign jurisdictional tax rate differences 4.2 ​ (0.1) ​ (1.7) ​ Changes in unrecognized tax benefits 0.3 ​ 0.7 ​ 0.2 ​ Goodwill and intangible impairment — ​ — ​ 2.4 ​ Loss on divestiture of offshore wind energy structures business ​ 2.2 ​ — ​ — ​ Other (1.1) ​ (2.4) ​ 1.9 ​ ​ 29.9 % ​ 23.6 % ​ 25.7 % ​
Schedule of Tax Effects of Significant Items Comprising Net Deferred Income Tax Liabilities	The tax effects of significant items comprising the Company’s net deferred income tax assets/liabilities are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ 2022 2021 Deferred income tax assets: ​ ​ Accrued expenses and allowances ​ $ 33,577 ​ $ 21,241 Tax credits and loss carryforwards ​ 67,249 ​ 83,690 Defined benefit pension liability ​ — ​ 134 Inventory allowances ​ 7,912 ​ 2,818 Accrued compensation and benefits ​ 24,398 ​ 24,302 Lease liabilities ​ 40,709 ​ 41,128 Deferred compensation ​ 16,308 ​ 10,893 Gross deferred income tax assets ​ 190,153 ​ 184,206 Valuation allowance ​ (48,974) ​ (54,256) Net deferred income tax assets ​ 141,179 ​ 129,950 Deferred income tax liabilities: ​ ​ Property, plant and equipment ​ 45,300 ​ 37,686 Intangible assets ​ 52,750 ​ 48,244 Defined benefit pension asset ​ 6,054 ​ — Lease assets ​ 40,708 ​ 41,128 Other deferred tax liabilities ​ 4,941 ​ 5,041 Total deferred income tax liabilities ​ 149,753 ​ 132,099 Net deferred income tax asset (liability) ​ $ (8,574) ​ $ (2,149) ​
Schedule of Deferred Income Tax Assets (Liabilities) Presented on the Consolidated Balance Sheets	Deferred income tax assets (liabilities) are presented as follows on the Consolidated Balance Sheets: ​ ​ ​ ​ ​ ​ ​ Balance Sheet Caption 2022 2021 Other assets ​ $ 32,517 ​ $ 45,700 Deferred income taxes ​ (41,091) ​ (47,849) Net deferred income tax asset (liability) ​ $ (8,574) ​ $ (2,149) ​
Schedule of Activity Related to Unrecognized Tax Benefits	The following summarizes the activity related to the unrecognized tax benefits in 2022 and 2021: ​ ​ ​ ​ ​ ​ ​ ​ 2022 2021 Gross unrecognized tax benefits—beginning of year ​ $ 2,664 ​ $ 1,864 Gross increases—tax positions in prior period ​ 1,133 ​ 1,315 Gross decreases—tax positions in prior period ​ — ​ (6) Gross increases—current‑period tax positions ​ 523 ​ 240 Settlements with taxing authorities ​ (1,576) ​ — Lapse of statute of limitations ​ (208) ​ (749) Gross unrecognized tax benefits—end of year ​ $ 2,536 ​ $ 2,664 ​

LONG-TERM DEBT (Tables)

LONG-TERM DEBT (Tables)	12 Months Ended
	Dec. 31, 2022
Debt Disclosure [Abstract]
Schedule of Long-Term Debt	Long-term debt is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, December 25, ​ 2022 2021 5.00% senior unsecured notes due 2044 (a) ​ $ 450,000 ​ $ 450,000 5.25% senior unsecured notes due 2054 (b) ​ 305,000 ​ 305,000 Unamortized discount on 5.00% and 5.25% senior unsecured notes (a) (b) ​ (20,053) ​ (20,436) Revolving credit agreement (c) ​ 140,513 ​ 218,897 Other notes ​ 3,587 ​ 5,684 Debt issuance costs ​ (6,918) ​ (7,189) Long-term debt ​ 872,129 ​ 951,956 Less: Current installments of long-term debt ​ 1,194 ​ 4,884 Long-term debt, excluding current installments ​ $ 870,935 ​ $ 947,072 ​ (a) The 5.00% senior unsecured notes due 2044 include an aggregate principal amount of $450,000 on which interest is paid and an unamortized discount balance of $12,820 at December 31, 2022. The notes bear interest at 5.000% per annum and are due on October 1, 2044. The discount will be amortized and recognized as interest expense as interest payments are made over the term of the notes. The notes may be repurchased prior to maturity in whole, or in part, at any time at 100% of their principal amount plus a make-whole premium and accrued and unpaid interest. These notes are guaranteed by certain subsidiaries of the Company. (b) The 5.25% senior unsecured notes due 2054 include an aggregate principal amount of $305,000 on which interest is paid and an unamortized discount balance of $7,233 at December 31, 2022. The notes bear interest at 5.250% per annum and are due on October 1, 2054. The discount will be amortized and recognized as interest expense as interest payments are made over the term of the notes. The notes may be repurchased prior to maturity in whole, or in part, at any time at 100% of their principal amount plus a make-whole premium and accrued and unpaid interest. These notes are guaranteed by certain subsidiaries of the Company. (11) LONG-TERM DEBT – CONTINUED (c) On October 18, 2021, the Company along with its wholly-owned subsidiaries Valmont Industries Holland B.V. and Valmont Group Pty. Ltd., as borrowers, entered into an amendment and restatement of the revolving credit agreement with the Company’s lenders. The maturity date of the revolving credit facility was extended to October 18, 2026. The credit facility provides for $800,000 of committed unsecured revolving credit loans with available borrowings thereunder to $400,000 in foreign currencies. The Company may increase the credit facility by up to an additional $300,000 at any time, subject to lenders increasing the amount of their commitments. The interest rate on the borrowings will be, at the Company’s option, either: (i) term SOFR (based on a 1-, 3-, or 6-month interest period, as selected by the Company) plus a 10 basis point adjustment plus a spread of 100 to 162.5 basis points, depending on the credit rating of the Company’s senior, unsecured, long-term debt published by Standard & Poor’s Rating Services and Moody’s Investors Service, Inc.; (ii) the higher of ● the prime lending rate , ● the overnight bank rate plus 50 basis points, and ● term SOFR (based on a 1 month interest period) plus 100 basis points, plus, in each case, 0 to 62.5 basis points, depending on the credit rating of the Company’s senior, unsecured, debt published by Standard & Poor’s Rating Services and Mood’s Investors Service, Inc.; or (iii) daily simple SOFR plus a 10 basis point adjustment plus a spread of 100 to 162.5 basis points, depending on the credit rating of the Company’s senior, unsecured, long-term debt published by Standard & Poor’s Rating Services and Mood’s Investors Service, Inc. At December 31, 2022, the Company had $140,513 outstanding borrowings under the revolving credit facility. The revolving credit facility has a maturity date of October 18, 2026, and contains a financial covenant that may limit additional borrowing capability under the agreement. At December 31, 2022, the Company had the ability to borrow $659,401 under this facility, after consideration of standby letters of credit of $162 associated with certain insurance obligations. The Company also maintains certain short-term bank lines of credit totaling $125,034, of which $119,188 was unused at December 31, 2022.

STOCK-BASED COMPENSATION (Table

STOCK-BASED COMPENSATION (Tables)	12 Months Ended
	Dec. 31, 2022
Share-based Payment Arrangement [Abstract]
Schedule of Assumptions Used in Estimating Fair Value of Each Option Grant	The fair value of each option grant made in 2022, 2021 and 2020 was estimated using the following assumptions: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2022 ​ 2021 ​ 2020 Expected volatility 32.36 % ​ 33.01 % ​ 33.72 % Risk-free interest rate 3.75 % ​ 1.26 % ​ 0.43 % Expected life from vesting date 5.4 yrs ​ 4.0 yrs ​ 4.0 yrs ​ Dividend yield 1.10 % ​ 1.20 % ​ 1.24 % ​
Summary of Activity of Stock Plans	Following is a summary of the stock option activity during 2020, 2021 and 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted ​ ​ ​ ​ ​ ​ ​ Weighted ​ Average ​ ​ ​ ​ ​ ​ ​ Average ​ Remaining ​ Aggregate ​ ​ Number of ​ Exercise ​ Contractual ​ Intrinsic ​ Shares Price Term Value Outstanding at December 28, 2019 488,560 ​ $ 133.13 ​ Granted 66,231 ​ 168.80 ​ Exercised (147,014) ​ 125.43 ​ Forfeited (8,212) ​ 137.49 ​ Outstanding at December 26, 2020 399,565 ​ $ 141.79 4.88 ​ $ 12,103 Options vested or expected to vest at December 26, 2020 389,633 ​ $ 141.56 4.81 ​ 11,890 Options exercisable at December 26, 2020 254,498 ​ $ 138.64 3.38 ​ 8,510 ​ The weighted average per share fair value of options granted during 2020 was $45.49. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted ​ ​ ​ ​ ​ ​ ​ Weighted ​ Average ​ ​ ​ ​ ​ ​ ​ Average ​ Remaining ​ Aggregate ​ ​ Number of ​ Exercise ​ Contractual ​ Intrinsic ​ Shares Price Term Value Outstanding at December 26, 2020 399,565 ​ $ 141.79 ​ Granted 47,223 ​ 252.89 ​ Exercised (169,908) ​ 135.76 ​ Forfeited (416) ​ 132.84 ​ Outstanding at December 25, 2021 276,464 ​ $ 164.48 5.88 ​ $ 22,586 Options vested or expected to vest at December 25, 2021 268,338 ​ $ 163.42 5.80 ​ 22,188 Options exercisable at December 25, 2021 154,860 ​ $ 142.15 4.00 ​ 15,896 ​ The weighted average per share fair value of options granted during 2021 was $67.81. ​ (12) STOCK-BASED COMPENSATION – CONTINUED ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted ​ ​ ​ ​ ​ ​ ​ Weighted ​ Average ​ ​ ​ ​ ​ ​ ​ Average ​ Remaining ​ Aggregate ​ ​ Number of ​ Exercise ​ Contractual ​ Intrinsic ​ Shares Price Term Value Outstanding at December 25, 2021 276,464 ​ $ 164.48 ​ Granted 40,564 ​ 332.63 ​ Exercised (121,163) ​ 139.89 ​ Forfeited (175) ​ 104.47 ​ Outstanding at December 31, 2022 195,690 ​ $ 214.62 7.53 ​ $ 22,644 Options vested or expected to vest at December 31, 2022 189,267 ​ $ 212.69 7.48 ​ 22,261 Options exercisable at December 31, 2022 90,556 ​ $ 172.08 6.40 ​ 14,276 ​ The weighted average per share fair value of options granted during 2022 was $104.01.
Schedule of Non-Vested Stock and Restricted Stock Units	During fiscal 2022, 2021 and 2020, the Company granted restricted stock units to directors and certain management employees as follows (which are not included in the above stock plan activity tables): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2022 2021 2020 Restricted stock units granted ​ 60,901 ​ 216,971 ​ 85,251 Weighted‑average per share price on grant date ​ $ 313.75 ​ $ 236.28 ​ $ 161.73 Recognized compensation expense ​ $ 22,664 ​ $ 16,147 ​ $ 9,081 ​
Share-based Payment Arrangement, Performance Shares, Outstanding Activity	During fiscal 2022, 2021 and 2020, the Company granted PSU awards as follows (which are not included in the above stock plan activity tables): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2022 2021 2020 Shares granted ​ 33,736 ​ 41,060 ​ 35,181 Weighted‑average per share price on grant date ​ $ 215.15 ​ $ 230.40 ​ $ 125.41 Recognized compensation expense ​ $ 16,066 ​ $ 10,035 ​ $ 3,165 ​

EARNINGS PER SHARE (Tables)

EARNINGS PER SHARE (Tables)	12 Months Ended
	Dec. 31, 2022
Earnings Per Share [Abstract]
Schedule of Reconciliation of Basic and Diluted Earnings Per Share (EPS)	The following table provides a reconciliation between basic and diluted earnings per share (“EPS”): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Dilutive ​ ​ ​ ​ ​ ​ Effect of ​ ​ ​ ​ ​ ​ ​ Stock ​ Diluted ​ ​ Basic EPS ​ Options ​ EPS 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ Net earnings attributable to Valmont Industries, Inc. ​ $ 250,863 ​ $ — ​ $ 250,863 Weighted average shares outstanding (000’s) ​ 21,311 ​ 269 ​ 21,580 Per share amount ​ $ 11.77 ​ $ (0.15) ​ $ 11.62 2021: ​ ​ ​ Net earnings attributable to Valmont Industries, Inc. ​ $ 195,630 ​ $ — ​ $ 195,630 Weighted average shares outstanding (000’s) ​ 21,193 ​ 300 ​ 21,493 Per share amount ​ $ 9.23 ​ $ (0.13) ​ $ 9.10 2020: ​ ​ ​ Net earnings attributable to Valmont Industries, Inc. ​ $ 140,693 ​ $ — ​ $ 140,693 Weighted average shares outstanding (000’s) ​ 21,315 ​ 110 ​ 21,425 Per share amount ​ $ 6.60 ​ $ (0.03) ​ $ 6.57 ​

DISCLOSURES ABOUT THE FAIR VA_2

DISCLOSURES ABOUT THE FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)	12 Months Ended
	Dec. 31, 2022
Fair Value Disclosures [Abstract]
Schedule of Trading Securities Measured at Fair Value	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurement Using: ​ ​ ​ Quoted Prices in Significant Other Significant ​ ​ ​ ​ ​ Active Markets ​ Observable ​ Unobservable ​ ​ Carrying Value ​ for Identical ​ Inputs ​ Inputs ​ ​ December 31, 2022 ​ Assets (Level 1) ​ (Level 2) ​ (Level 3) Assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Trading securities ​ $ 25,008 ​ $ 25,008 ​ $ — ​ $ — Derivative financial instruments, net ​ $ 1,404 ​ $ — ​ $ 1,404 ​ $ — Cash and cash equivalents - mutual funds ​ $ 7,205 ​ $ 7,205 ​ $ — ​ $ — Cash and cash equivalents - marketable securities ​ $ 136 ​ $ — ​ $ 136 ​ $ — ​ (15) DISCLOSURES ABOUT THE FAIR VALUE OF FINANCIAL INSTRUMENTS – CONTINUED ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurement Using: ​ ​ ​ Quoted Prices in Significant Other Significant ​ ​ Carrying Value ​ Active Markets ​ Observable ​ Unobservable ​ ​ December 25, ​ for Identical ​ Inputs ​ Inputs ​ ​ 2021 ​ Assets (Level 1) ​ (Level 2) ​ (Level 3) Assets (Liabilities): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Trading securities ​ $ 30,076 ​ $ 30,076 ​ $ — ​ $ — Derivative financial instruments, net ​ $ (4,007) ​ $ — ​ $ (4,007) ​ $ —

DERIVATIVE FINANCIAL INSTRUME_2

DERIVATIVE FINANCIAL INSTRUMENTS (Tables)	12 Months Ended
	Dec. 31, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Fair Value of Derivative Instruments	Fair value of derivative instruments at December 31, 2022 and December 25, 2021 are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives designated as hedging instruments: Balance sheet location ​ 2022 ​ 2021 Commodity forward contracts ​ Accrued expenses ​ $ (3,854) ​ $ (5,802) Foreign currency forward contracts Prepaid expenses and other assets ​ ​ 83 ​ 149 Foreign currency forward contracts Accrued expenses ​ ​ — ​ (118) Cross currency swap contracts Prepaid expenses and other assets ​ ​ 5,385 ​ 1,764 Cross currency swap contracts Accrued expenses ​ ​ (210) ​ — ​ ​ ​ ​ $ 1,404 ​ $ (4,007) ​
Schedule of Gains (Losses) on Derivatives Recognized on Statements of Earnings	Gains (losses) on derivatives recognized in the Consolidated Statements of Earnings for the years ended December 31, 2022, December 25, 2021, and December 26, 2020 are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives designated as hedging instruments: ​ Statements of earnings location ​ ​ 2022 ​ 2021 ​ 2020 Commodity forward contracts ​ Product cost of sales ​ ​ $ (5,212) ​ $ 25,821 ​ $ — Foreign currency forward contracts ​ Product sales ​ ​ ​ — ​ ​ — ​ ​ 1,598 Foreign currency forward contracts ​ Other income ​ ​ ​ (45) ​ (40) ​ 187 Interest rate hedge amortization ​ Interest expense ​ ​ ​ (64) ​ (64) ​ (64) Cross currency swap contracts ​ Loss from divestiture of wind energy structures business ​ ​ ​ 4,827 ​ — ​ — Cross currency swap contracts ​ Interest expense ​ ​ ​ 2,875 ​ 2,780 ​ 2,738 ​ ​ ​ ​ ​ $ 2,381 ​ $ 28,497 ​ $ 4,459 ​
Schedule of notional amounts of outstanding derivative	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Notional ​ ​ ​ Swapped ​ Set Settlement Currency ​ Amount ​ Termination Date ​ Interest Rate ​ Amount Euro ​ $ 80,000 ​ April 1, 2024 2.825% ​ € 71,550 ​

GUARANTEES (Tables)

GUARANTEES (Tables)	12 Months Ended
	Dec. 31, 2022
Guarantees [Abstract]
Schedule of Changes in the Product Warranty Accrual	Changes in the product warranty accrual, which is recorded in “Accrued expenses”, for the years ended December 31, 2022 and December 25, 2021, were as follows: ​ ​ ​ ​ ​ ​ ​ ​ 2022 2021 Balance, beginning of period ​ $ 21,308 ​ $ 14,787 Payments made ​ (10,569) ​ (6,444) Change in liability for warranties issued during the period ​ 12,866 ​ 13,534 Change in liability for pre-existing warranties ​ (3,832) ​ (569) Balance, end of period ​ $ 19,773 ​ $ 21,308

DEFINED BENEFIT RETIREMENT PL_2

DEFINED BENEFIT RETIREMENT PLAN (Tables)	12 Months Ended
	Dec. 31, 2022
Retirement Benefits [Abstract]
Schedule of Changes in PBO and Fair Value of Plan Assets for Pension Plan	(19) DEFINED BENEFIT RETIREMENT PLAN – CONTINUED Changes in the PBO and fair value of plan assets for the pension plan for the period from December 26, 2020 to December 25, 2021 were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Projected ​ ​ ​ ​ ​ ​ Benefit ​ Plan ​ Funded ​ ​ Obligation ​ Assets ​ status Fair Value at December 26, 2020 ​ $ 860,173 ​ $ 741,650 ​ $ (118,523) Employer contributions ​ ​ — ​ ​ 1,924 ​ ​ Interest cost ​ 9,896 ​ — ​ Actual return on plan assets ​ — ​ 48,637 ​ Benefits paid ​ (22,952) ​ (22,952) ​ Actuarial gain ​ (77,379) ​ — ​ Currency translation ​ (8,032) ​ (8,089) ​ Fair Value at December 25, 2021 ​ $ 761,706 ​ $ 761,170 ​ $ (536) ​ Changes in the PBO and fair value of plan assets for the pension plan for the period from December 25, 2021 to December 31, 2022 were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Projected ​ ​ ​ ​ ​ ​ Benefit ​ Plan ​ Funded ​ ​ Obligation ​ Assets ​ status Fair Value at December 25, 2021 ​ $ 761,706 ​ $ 761,170 ​ $ (536) Employer contributions ​ ​ — ​ ​ 17,155 ​ ​ Interest cost ​ 12,551 ​ — ​ Actual return on plan assets ​ — ​ (228,493) ​ Benefits paid ​ (20,175) ​ (20,175) ​ Actuarial gain ​ (248,252) ​ — ​ Currency translation ​ (70,119) ​ (69,730) ​ Fair Value at December 31, 2022 ​ $ 435,711 ​ $ 459,927 ​ $ 24,216 ​
Schedule of Pre-Tax Amounts Recognized in Accumulated Other Comprehensive Income (Loss)	Pre-tax amounts recognized in accumulated other comprehensive income (loss) as of December 31, 2022 and December 25, 2021 consisted of actuarial gains (losses): ​ ​ ​ ​ Balance December 26, 2020 $ (165,258) Actuarial gain ​ 102,529 Prior service costs amortization ​ 550 Currency translation gain ​ 1,239 Balance December 25, 2021 ​ (60,940) Actuarial loss ​ (2,915) Prior service costs amortization ​ 493 Currency translation gain ​ 5,451 Balance December 31, 2022 ​ $ (57,911) ​
Schedule of Weighted-Average Actuarial Assumptions Used to Determine the Benefit Obligation	The weighted-average actuarial assumptions used to determine the benefit obligation at December 31, 2022 and December 25, 2021 were as follows: ​ ​ ​ ​ ​ ​ ​ ​ Percentages 2022 2021 Discount rate 4.80 % ​ 1.90 % Salary increase N/A ​ N/A ​ CPI inflation 2.35 % ​ 2.70 % RPI inflation 3.25 % ​ 3.30 % ​
Schedule of Components of the Net Periodic Pension (Benefit) Expense	​ The components of the net periodic pension benefit for the fiscal years ended December 31, 2022 and December 25, 2021 were as follows: ​ ​ ​ ​ ​ ​ ​ Net periodic (benefit) expense: ​ 2022 2021 Interest cost ​ $ 12,551 ​ $ 9,896 Expected return on plan assets ​ (23,131) ​ (27,763) Amortization of prior service cost ​ 493 ​ 550 Amortization of actuarial loss ​ — ​ 2,750 Net periodic benefit ​ $ (10,087) ​ $ (14,567) ​
Schedule of Weighted-Average Actuarial Assumptions Used to Determine Expense	The weighted-average actuarial assumptions used to determine expense are as follows for fiscal years 2022 and 2021: ​ ​ ​ ​ ​ ​ ​ ​ Percentages 2022 ​ 2021 Discount rate for benefit obligations 1.90 % ​ 1.40 % Discount rate for interest cost ​ 1.80 % ​ 1.15 % Expected return on plan assets 3.48 % ​ 3.96 % CPI Inflation 2.70 % ​ 2.00 % RPI Inflation 3.30 % ​ 2.90 % ​
Schedule of Expected Pension Benefit Payments	The following table details expected pension benefit payments for the years 2023 through 2032: ​ ​ ​ ​ 2023 $ 20,432 2024 ​ 21,036 2025 ​ 21,641 2026 ​ 22,366 2027 ​ 22,970 Years 2028 - 2032 ​ 125,733 ​
Schedule of Pension Plan Assets Measured at Fair Value on a Recurring Basis	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Quoted Prices in Significant Other Significant ​ ​ ​ ​ Active Markets ​ Observable ​ Unobservable ​ ​ ​ ​ ​ for Identical ​ Inputs ​ Inputs ​ ​ ​ December 31, 2022 ​ Inputs (Level 1) ​ (Level 2) ​ (Level 3) ​ Total Plan assets at fair value: ​ ​ ​ ​ Temporary cash investments ​ $ 5,916 ​ $ — ​ $ — ​ $ 5,916 Total plan net assets at fair value ​ $ 5,916 ​ $ — ​ $ — ​ $ 5,916 Plan assets at NAV: ​ ​ ​ ​ Leveraged inflation-linked gilt funds ​ ​ ​ ​ ​ ​ 206,555 Corporate bonds ​ ​ ​ ​ ​ ​ 63,953 Corporate stock ​ ​ ​ ​ ​ ​ 55,379 Secured income asset funds ​ ​ ​ ​ ​ ​ 128,124 Total plan assets at NAV ​ ​ ​ ​ ​ ​ 454,011 Total plan assets ​ ​ ​ ​ ​ ​ $ 459,927 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Quoted Prices in Significant Other Significant ​ ​ ​ ​ Active Markets ​ Observable ​ Unobservable ​ ​ ​ ​ ​ for Identical ​ Inputs ​ Inputs ​ ​ ​ December 25, 2021 ​ Inputs (Level 1) ​ (Level 2) ​ ​ (Level 3) ​ Total Plan assets at fair value: ​ ​ ​ ​ Temporary cash investments ​ $ 14,000 ​ $ — ​ $ — ​ $ 14,000 Total plan net assets at fair value ​ $ 14,000 ​ $ — ​ $ — ​ $ 14,000 Plan assets at NAV: ​ ​ ​ ​ Leveraged inflation-linked gilt funds ​ ​ ​ ​ ​ ​ 283,288 Corporate bonds ​ ​ ​ ​ ​ ​ 107,945 Corporate stock ​ ​ ​ ​ ​ ​ 212,730 Secured income asset funds ​ ​ ​ ​ ​ ​ 143,207 Total plan assets at NAV ​ ​ ​ ​ ​ ​ 747,170 Total plan assets ​ ​ ​ ​ ​ ​ $ 761,170

LEASES (Tables)

LEASES (Tables)	12 Months Ended
	Dec. 31, 2022
Leases [Abstract]
Schedule of Lease Cost	(20) LEASES – CONTINUED Lease cost and other information related to the Company’s operating leases at December 31, 2022 and December 25, 2021 are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fifty-three ​ Fifty-two ​ ​ ​ weeks ended ​ weeks ended ​ ​ ​ December 31, ​ December 25, ​ ​ 2022 ​ 2021 ​ Operating lease cost ​ $ 31,062 ​ ​ $ 27,421 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Operating cash outflows from operating leases ​ $ 33,150 ​ $ 27,793 ​ ROU assets obtained in exchange for lease obligations ​ $ 27,480 ​ $ 86,481 ​ Weighted average remaining lease term ​ 17 years ​ 17 years ​ Weighted average discount rate ​ 4.2 % ​ 4.0 % ​ ​
Schedule of Assets and Liabilities Lessee	Supplemental balance sheet information related to operating leases as of December 31, 2022 and December 25, 2021 is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, December 25, ​ ​ Classification ​ 2022 ​ 2021 Operating lease assets Other assets ​ $ 162,930 ​ $ 152,664 ​ ​ ​ ​ ​ ​ ​ ​ ​ Operating lease short-term liabilities Other accrued expenses ​ 16,857 ​ 16,754 Operating lease long-term liabilities Operating lease liabilities ​ 155,469 ​ 147,759 Total lease liabilities ​ ​ ​ $ 172,326 ​ $ 164,513 ​
Schedule of Future Minimum Lease Payments	Minimum lease payments under operating leases expiring subsequent to December 31, 2022 are as follows: ​ ​ ​ ​ Fiscal year ending: ​ 2023 ​ $ 23,815 2024 ​ 20,689 2025 ​ 19,615 2026 ​ 17,333 2027 ​ 13,924 Subsequent ​ 147,767 Total minimum lease payments ​ $ 243,143 Less: Interest ​ $ 70,817 Present value of minimum lease payments ​ $ 172,326 ​

BUSINESS SEGMENTS (Tables)

BUSINESS SEGMENTS (Tables)	12 Months Ended
	Dec. 31, 2022
Segment Reporting [Abstract]
Schedule of Segment Reporting Information of Sales and Operating Income	(21) BUSINESS SEGMENTS – CONTINUED Summary by Business ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2022 ​ 2021 ​ 2020 SALES: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Infrastructure ​ ​ $ 2,928,419 ​ $ 2,372,100 ​ $ 2,141,741 Agriculture ​ ​ ​ 1,346,672 ​ ​ 1,028,717 ​ ​ 645,831 Other ​ ​ ​ 100,219 ​ ​ 123,001 ​ ​ 120,063 Total ​ ​ ​ 4,375,310 ​ ​ 3,523,818 ​ ​ 2,907,635 INTERSEGMENT SALES: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Infrastructure ​ ​ ​ (18,673) ​ ​ (10,576) ​ ​ (6,541) Agriculture ​ ​ ​ (11,387) ​ ​ (11,667) ​ ​ (5,739) Other ​ ​ ​ — ​ ​ — ​ ​ — Total ​ ​ ​ (30,060) ​ ​ (22,243) ​ ​ (12,280) NET SALES: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Infrastructure ​ ​ ​ 2,909,746 ​ ​ 2,361,524 ​ ​ 2,135,200 Agriculture ​ ​ ​ 1,335,285 ​ ​ 1,017,050 ​ ​ 640,092 Other ​ ​ ​ 100,219 ​ ​ 123,001 ​ ​ 120,063 Total ​ ​ $ 4,345,250 ​ $ 3,501,575 ​ $ 2,895,355 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ OPERATING INCOME (LOSS): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Infrastructure ​ ​ ​ 354,499 ​ ​ 273,598 ​ ​ 217,364 Agriculture ​ ​ ​ 179,263 ​ ​ 137,027 ​ ​ 83,046 Other ​ ​ ​ 2,259 ​ ​ (40,192) ​ ​ (8,192) Corporate ​ ​ ​ (102,772) ​ ​ (83,648) ​ ​ (66,265) Total ​ ​ $ 433,249 ​ $ 286,785 ​ $ 225,953 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fifty-three weeks ended December 31, 2022 ​ ​ Infrastructure Agriculture ​ Other Intersegment Sales Consolidated Geographical market: ​ ​ ​ ​ ​ ​ ​ North America ​ $ 2,234,339 ​ $ 766,929 ​ $ — ​ $ (26,248) ​ $ 2,975,020 International ​ 694,080 ​ 579,743 ​ 100,219 ​ (3,812) ​ 1,370,230 Total ​ $ 2,928,419 ​ $ 1,346,672 ​ $ 100,219 ​ $ (30,060) ​ $ 4,345,250 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Product line: ​ ​ ​ ​ ​ Transmission, Distribution, and Substation ​ $ 1,184,660 ​ $ — ​ $ — ​ $ — ​ $ 1,184,660 Lighting and Transportation ​ 940,462 ​ — ​ — ​ — ​ 940,462 Coatings ​ 356,707 ​ — ​ — ​ (15,327) ​ 341,380 Telecommunications ​ 320,342 ​ — ​ — ​ — ​ 320,342 Renewable Energy ​ 126,248 ​ — ​ 100,219 ​ (3,346) ​ 223,121 Irrigation Equipment and Parts, excluding Technology ​ — ​ 1,231,587 ​ — ​ (11,387) ​ 1,220,200 Technology Products and Services ​ — ​ 115,085 ​ — ​ — ​ 115,085 Total ​ $ 2,928,419 ​ $ 1,346,672 ​ $ 100,219 ​ $ (30,060) ​ $ 4,345,250 ​ (21) BUSINESS SEGMENTS – CONTINUED ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fifty-two weeks ended December 25, 2021 ​ ​ Infrastructure Agriculture ​ Other Intersegment Sales Consolidated Geographical market: ​ ​ ​ ​ ​ ​ ​ North America ​ $ 1,724,531 ​ $ 545,574 ​ $ — ​ $ (22,243) ​ $ 2,247,862 International ​ 647,569 ​ 483,143 ​ 123,001 ​ — ​ 1,253,713 Total ​ $ 2,372,100 ​ $ 1,028,717 ​ $ 123,001 ​ $ (22,243) ​ $ 3,501,575 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Product line: ​ ​ ​ ​ ​ Transmission, Distribution, and Substation ​ $ 935,099 ​ $ — ​ $ — ​ $ — ​ $ 935,099 Lighting and Transportation ​ 825,923 ​ — ​ — ​ — ​ 825,923 Coatings ​ 309,647 ​ — ​ — ​ (10,575) ​ 299,072 Telecommunications ​ 238,527 ​ — ​ — ​ — ​ 238,527 Renewable Energy ​ 62,904 ​ — ​ 123,001 ​ — ​ 185,905 Irrigation Equipment and Parts, excluding Technology ​ — ​ 930,858 ​ — ​ (11,668) ​ 919,190 Technology Products and Services ​ — ​ 97,859 ​ — ​ — ​ 97,859 Total ​ $ 2,372,100 ​ $ 1,028,717 ​ $ 123,001 ​ $ (22,243) ​ $ 3,501,575 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fifty-two weeks ended December 26, 2020 ​ ​ Infrastructure Agriculture ​ Other Intersegment Sales Consolidated Geographical market: ​ ​ ​ ​ ​ ​ ​ North America ​ $ 1,574,802 ​ $ 378,424 ​ $ — ​ $ (12,280) ​ $ 1,940,946 International ​ 566,939 ​ 267,407 ​ 120,063 ​ — ​ 954,409 Total ​ $ 2,141,741 ​ $ 645,831 ​ $ 120,063 ​ $ (12,280) ​ $ 2,895,355 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Product line: ​ ​ ​ ​ ​ Transmission, Distribution, and Substation ​ $ 795,693 ​ $ — ​ $ — ​ $ — ​ $ 795,693 Lighting and Transportation ​ 797,335 ​ — ​ — ​ — ​ 797,335 Coatings ​ 276,087 ​ — ​ — ​ (6,541) ​ 269,546 Telecommunications ​ 186,244 ​ — ​ — ​ — ​ 186,244 Renewable Energy ​ 86,382 ​ — ​ 120,063 ​ — ​ 206,445 Irrigation Equipment and Parts, excluding Technology ​ — ​ 578,686 ​ — ​ (5,739) ​ 572,947 Technology Products and Services ​ — ​ 67,145 ​ — ​ — ​ 67,145 Total ​ $ 2,141,741 ​ $ 645,831 ​ $ 120,063 ​ $ (12,280) ​ $ 2,895,355 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2022 2021 2020 OPERATING INCOME (LOSS): ​ ​ ​ ​ ​ ​ ​ ​ ​ Infrastructure ​ $ 354,499 ​ $ 273,598 ​ $ 217,364 Agriculture ​ 179,263 ​ 137,027 ​ 83,046 Other ​ ​ 2,259 ​ ​ (40,192) ​ ​ (8,192) Corporate ​ (102,772) ​ (83,648) ​ (66,265) Total ​ 433,249 ​ 286,785 ​ 225,953 Interest expense, net ​ (45,519) ​ (41,420) ​ (38,701) Loss from divestiture of wind energy structures business ​ ​ (33,273) ​ — ​ — Other ​ 9,431 ​ 14,718 ​ 5,516 Earnings before income taxes and equity in earnings of nonconsolidated subsidiaries ​ $ 363,888 ​ $ 260,083 ​ $ 192,768 ​ (21) BUSINESS SEGMENTS – CONTINUED ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2022 2021 2020 TOTAL ASSETS: ​ ​ ​ Infrastructure ​ $ 2,267,800 ​ $ 2,102,851 ​ $ 1,933,970 Agriculture ​ 1,112,588 ​ 1,027,272 ​ 465,322 Other ​ ​ — ​ ​ 67,592 ​ ​ 137,316 Corporate ​ 176,608 ​ 249,534 ​ 416,552 Total ​ $ 3,556,996 ​ $ 3,447,249 ​ $ 2,953,160 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2022 2021 2020 CAPITAL EXPENDITURES: ​ ​ ​ ​ ​ ​ ​ ​ ​ Infrastructure $ 53,228 $ 72,129 $ 81,074 Agriculture ​ 32,886 ​ 17,509 ​ 16,740 Other ​ ​ — ​ ​ 345 ​ ​ — Corporate ​ 7,174 ​ 17,807 ​ 8,886 Total ​ $ 93,288 ​ $ 107,790 ​ $ 106,700 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2022 2021 2020 DEPRECIATION AND AMORTIZATION: ​ ​ ​ ​ ​ ​ ​ ​ ​ Infrastructure ​ $ 62,398 ​ $ 59,748 ​ $ 58,985 Agriculture ​ 23,681 ​ 17,813 ​ 12,098 Other ​ ​ 1,393 ​ ​ 5,988 ​ ​ 5,848 Corporate ​ 9,695 ​ 9,028 ​ 5,961 Total ​ $ 97,167 ​ $ 92,577 ​ $ 82,892 ​ Summary by Geographical Area by Location of Valmont Facilities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2022 2021 2020 NET SALES: ​ ​ ​ ​ ​ ​ ​ ​ ​ United States ​ $ 2,965,673 ​ $ 2,260,198 ​ $ 1,919,136 Australia ​ 292,072 ​ 297,720 ​ 252,253 Brazil ​ 354,497 ​ 200,402 ​ 103,591 Denmark ​ 100,219 ​ 123,001 ​ 120,063 Other ​ 632,789 ​ 620,254 ​ 500,312 Total ​ $ 4,345,250 ​ $ 3,501,575 ​ $ 2,895,355 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ LONG-LIVED ASSETS: ​ ​ ​ United States ​ $ 1,246,956 ​ $ 1,172,552 ​ $ 748,886 Australia ​ 82,290 ​ 173,240 ​ 179,673 Brazil ​ 42,259 ​ 28,583 ​ 17,151 Denmark ​ — ​ 21,232 ​ 61,546 Other ​ 404,906 ​ 338,879 ​ 391,279 Total ​ $ 1,776,411 ​ $ 1,734,486 ​ $ 1,398,535 ​
Summary by Geographical Area by Location	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2022 2021 2020 DEPRECIATION AND AMORTIZATION: ​ ​ ​ ​ ​ ​ ​ ​ ​ Infrastructure ​ $ 62,398 ​ $ 59,748 ​ $ 58,985 Agriculture ​ 23,681 ​ 17,813 ​ 12,098 Other ​ ​ 1,393 ​ ​ 5,988 ​ ​ 5,848 Corporate ​ 9,695 ​ 9,028 ​ 5,961 Total ​ $ 97,167 ​ $ 92,577 ​ $ 82,892 ​

SUMMARY OF SIGNIFICANT ACCOUN_4

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details)	12 Months Ended
	Dec. 31, 2022 USD ($) segment	Dec. 24, 2022 segment	Dec. 25, 2021 USD ($)	Dec. 26, 2020 USD ($)
Cash overdrafts
Cash book overdrafts	$ 25,075,000		$ 19,670,000
Segments
Number of reportable segments | segment	2	2
Accounts receivable
Trade accounts receivable sold	$ 100,000,000		$ 25,400,000
Fiscal Year
Length of fiscal year, 53 weeks			371 days
Length of fiscal year 2020, 2019, 2018	364 days		364 days	364 days
Additional net sales	$ 80,800,000
Additional net earnings	5,300,000
Research and Development [Abstract]
Research and development expense	$ 46,000,000		$ 37,000,000	$ 21,400,000
Minimum | Owned Affiliates And Joint Ventures [Member]
Principles of Consolidation
Equity method investment in affiliates, ownership percentage	20%
Maximum
Principles of Consolidation
Cost method investment in affiliates, ownership percentage	20%
Maximum | Owned Affiliates And Joint Ventures [Member]
Principles of Consolidation
Equity method investment in affiliates, ownership percentage	50%

SUMMARY OF SIGNIFICANT ACCOUN_5

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Allowance for Doubtful Receivables (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 25, 2021	Dec. 26, 2020
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	$ 18,050	$ 15,952	$ 9,548
Charged to Profit and Loss	4,237	3,379	7,957
Currency Translation Adjustment	(522)	(339)	260
Deductions from Reserves	(875)	(942)	(1,813)
Balance at Close of Period	$ 20,890	$ 18,050	$ 15,952

SUMMARY OF SIGNIFICANT ACCOUN_6

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - PP&E (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 25, 2021	Dec. 26, 2020
Long-lived assets
Depreciation expense	$ 73,938	$ 70,223	$ 63,890
Impairment of long-lived assets	$ 27,900
Buildings and improvements | Minimum
Long-lived assets
Estimated useful lives	15 years
Buildings and improvements | Maximum
Long-lived assets
Estimated useful lives	40 years
Machinery and equipment | Minimum
Long-lived assets
Estimated useful lives	3 years
Machinery and equipment | Maximum
Long-lived assets
Estimated useful lives	12 years
Transportation equipment | Minimum
Long-lived assets
Estimated useful lives	3 years
Transportation equipment | Maximum
Long-lived assets
Estimated useful lives	24 years
Office furniture and equipment
Long-lived assets
Estimated useful lives	7 years
Office furniture and equipment | Minimum
Long-lived assets
Estimated useful lives	3 years

SUMMARY OF SIGNIFICANT ACCOUN_7

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Intangible Assets (Details)	12 Months Ended
	Dec. 31, 2022
Minimum
Indefinite-lived Intangible Assets [Line Items]
Intangible assets lives	5 years
Maximum
Indefinite-lived Intangible Assets [Line Items]
Intangible assets lives	20 years

SUMMARY OF SIGNIFICANT ACCOUN_8

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Comprehensive Income (Loss) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($)
Components of accumulated other comprehensive income (loss)
Beginning balance	$ 1,413,597
Ending balance	1,641,712
Foreign Currency Translation Adjustments
Components of accumulated other comprehensive income (loss)
Beginning balance	(243,350)
Current-period comprehensive income (loss)	(43,426)
Divestiture of offshore wind energy structures business	25,977
Ending balance	(260,799)
Gain on Hedging Activities
Components of accumulated other comprehensive income (loss)
Beginning balance	15,777
Current-period comprehensive income (loss)	7,942
Divestiture of offshore wind energy structures business	(3,620)
Ending balance	20,099
Defined Benefit Pension Plan
Components of accumulated other comprehensive income (loss)
Beginning balance	(35,554)
Current-period comprehensive income (loss)	1,345
Ending balance	(34,209)
Accumulated Other Comprehensive Income (Loss)
Components of accumulated other comprehensive income (loss)
Beginning balance	(263,127)
Current-period comprehensive income (loss)	(34,139)
Divestiture of offshore wind energy structures business	22,357
Ending balance	$ (274,909)

SUMMARY OF SIGNIFICANT ACCOUN_9

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 24, 2022	Dec. 25, 2021	Dec. 26, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net sales	$ 4,345,250	$ 4,345,250	$ 3,501,575	$ 2,895,355
Contract assets	174,539		142,643
Contract liabilities	178,531		213,203
Contract liabilities, current	172,915		135,746
Revenue recognized from contract liability	96,373		105,406
Remaining performance obligation	11,080
Contract Liabilities
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Contract liabilities, current	172,915
Other Noncurrent Liabilities
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Contract liabilities, noncurrent	5,616
Agriculture
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net sales		$ 1,335,285	1,017,050	640,092
Point in Time
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net sales	2,995,139		2,384,575	1,921,328
Point in Time | Infrastructure
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net sales	1,687,458		1,388,297	1,296,497
Point in Time | Agriculture
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net sales	1,307,681		996,278	624,831
Over Time
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net sales	1,350,111		1,117,000	974,027
Over Time | Infrastructure
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net sales	1,222,288		973,227	838,703
Over Time | Agriculture
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net sales	27,604		20,772	15,261
Over Time | Other
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net sales	$ 100,219		$ 123,001	$ 120,063
Minimum
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Expected timing of performance obligation satisfaction	12 months
Maximum
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Expected timing of performance obligation satisfaction	24 months

SUMMARY OF SIGNIFICANT ACCOU_10

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Share Repurchases (Details) - USD ($)	1 Months Ended	12 Months Ended			103 Months Ended
	May 31, 2014	Dec. 31, 2022	Dec. 25, 2021	Dec. 26, 2020	Dec. 31, 2022	Feb. 27, 2023	Oct. 31, 2018	Feb. 28, 2015
Equity, Class of Treasury Stock [Line Items]
Authorized amount	$ 500,000,000						$ 250,000,000	$ 250,000,000
Length of authorization period	12 months
Shares acquired under share repurchase program		137,612	111,833	441,119	6,613,018
Amount paid for share repurchase		$ 40,474,000	$ 26,100,000	$ 56,491,000	$ 918,600,000
Subsequent Event [Member]
Equity, Class of Treasury Stock [Line Items]
Directors increased the amount remaining under the program						$ 400,000,000

ACQUISITIONS - Narrative (Detai

ACQUISITIONS - Narrative (Details) - USD ($)

1 Months Ended

3 Months Ended

Jun. 01, 2022

May 12, 2021

Apr. 20, 2021

May 29, 2020

Mar. 06, 2020

Aug. 31, 2022

May 31, 2022

Dec. 26, 2020

Feb. 29, 2020

Jun. 26, 2021

Mar. 28, 2020

Dec. 31, 2022

Dec. 25, 2021

Business Acquisition [Line Items]

Goodwill

$ 430,322,000

$ 739,861,000

$ 708,566,000

Operating lease liabilities

172,326,000

164,513,000

Non-controlling interest in consolidated subsidiaries

$ 60,865,000

$ 26,750,000

Energia Solar do Brasil

Business Acquisition [Line Items]

Cash paid to acquire business

$ 4,308,000

Percentage acquired

55%

Goodwill

$ 3,341,000

Contingent consideration liability, current

646,000

Goodwill expected to be tax deductible

0

Conceal Fab

Business Acquisition [Line Items]

Cash paid to acquire business

$ 39,287,000

Percentage acquired

51%

Current assets

$ 21,133,000

Property, plant, and equipment acquired

3,813,000

Other assets

9,108,000

Goodwill

42,465,000

Total fair value of assets acquired

107,719,000

Current Liabilities

6,658,000

Long-term debt

2,038,000

Operating lease liabilities

7,812,000

Deferred taxes

5,464,000

Other noncurrent liabilities

12,000

Total fair value of liabilities assumed

21,984,000

Non-controlling interest in consolidated subsidiaries

41,693,000

Net assets acquired

44,042,000

Contingent consideration liability, current

1,850,000

KC Utility Packaging

Business Acquisition [Line Items]

Cash paid to acquire business

$ 4,200,000

Percentage acquired

75%

Goodwill

$ 1,100,000

Contingent consideration liability, current

400,000

AgSense

Business Acquisition [Line Items]

Percentage acquired

49%

100%

Consideration transferred

$ 43,983,000

Holdback payment

$ 2,200,000

Deferred tax asset recognized

$ 7,700,000

Torrent Engineering and Equipment

Business Acquisition [Line Items]

Percentage acquired

40%

Consideration transferred

$ 3,500,000

Convert

Business Acquisition [Line Items]

Percentage acquired

9%

16%

Consideration transferred

$ 3,046,000

$ 11,750,000

Convert | Minority Interest Owner

Business Acquisition [Line Items]

Percentage not owned by the Company

25%

Prospera

Business Acquisition [Line Items]

Cash paid to acquire business

$ 300,000,000

Current assets

647,000

Property, plant, and equipment acquired

1,063,000

Goodwill

273,453,000

Total fair value of assets acquired

310,913,000

Current Liabilities

2,690,000

Deferred taxes

8,223,000

Total fair value of liabilities assumed

10,913,000

Net assets acquired

300,000,000

Goodwill expected to be tax deductible

0

PivoTrac

Business Acquisition [Line Items]

Cash paid to acquire business

$ 12,500,000

Goodwill

10,800,000

Contingent consideration liability, current

1,500,000

Consideration transferred

14,000,000

Goodwill expected to be tax deductible

0

Valmont West Coast Engineering

Business Acquisition [Line Items]

Percentage acquired

20%

Consideration transferred

$ 4,292,000

Customer Relationships | Energia Solar do Brasil

Business Acquisition [Line Items]

Intangible assets

$ 3,718,000

Useful life

8 years

Customer Relationships | KC Utility Packaging

Business Acquisition [Line Items]

Intangible assets

4,000,000

Customer Relationships | PivoTrac

Business Acquisition [Line Items]

Intangible assets

$ 2,627,000

Useful life

8 years

Other | KC Utility Packaging

Business Acquisition [Line Items]

Intangible assets

$ 500,000

Technology-Based Intangible Assets | Conceal Fab

Business Acquisition [Line Items]

Intangible assets

26,200,000

Technology-Based Intangible Assets | Prospera

Business Acquisition [Line Items]

Intangible assets

$ 32,900,000

Useful life

5 years

Trade Name | Conceal Fab

Business Acquisition [Line Items]

Intangible assets

$ 5,000,000

Trade Name | Prospera

Business Acquisition [Line Items]

Intangible assets

$ 2,850,000

Useful life

7 years

DIVESTITURES - Assets and lia_2

DIVESTITURES - Assets and liabilities (Details) - Valmont SM, Offshore Wind Business [Member] kr in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($)	Dec. 31, 2022 DKK (kr)	Dec. 25, 2021 USD ($)	Dec. 31, 2022 DKK (kr)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Operating income	$ 2,259		$ 40,192
Cash received	12,570	kr 90,000
Impairment of long-lived assets			$ 27,900
Escrow deposit	4,027			kr 28,000
Cash and cash equivalents	12,420
Receivables, net	35,407
Inventories	1,144
Contract assets	19,127
Prepaid expenses and other assets	1,852
Net property, plant, and equipment	12,915
Intangible assets	5,579
Other assets	1,103
Total assets	89,547
Accounts payable	23,611
Contract liabilities	34,814
Accrued expenses	4,737
Deferred income taxes	1,375
Total liabilities	64,537
Net assets	$ 25,010

DIVESTITURES - Pre-tax loss (De

DIVESTITURES - Pre-tax loss (Details) - Valmont SM, Offshore Wind Business [Member] $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on divesture of business	$ 12,123
Pre-tax loss from divestitures, before recognition of currency translation loss	12,123
Recognition of cumulative currency translation loss and hedges (out of OCI)	21,150
Net pre-tax loss from divestiture of offshore wind business	$ 33,273

RESTRUCTURING ACTIVITIES - Sche

RESTRUCTURING ACTIVITIES - Schedule of Restructuring Activities (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($) facility
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 23,149
Coatings | Facility Closing
Restructuring Cost and Reserve [Line Items]
Number of facilities closed | facility	1
Infrastructure
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 16,811
Agriculture
Restructuring Cost and Reserve [Line Items]
Restructuring charges	2,968
Other
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1,365
Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring charges	2,005
Cost of Sales
Restructuring Cost and Reserve [Line Items]
Restructuring charges	6,737
Cost of Sales | Severance
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1,139
Cost of Sales | Other cash restructuring expenses
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1,847
Cost of Sales | Impairments of fixed assets/net loss on disposals
Restructuring Cost and Reserve [Line Items]
Restructuring charges	3,751
Cost of Sales | Infrastructure
Restructuring Cost and Reserve [Line Items]
Restructuring charges	6,737
Cost of Sales | Infrastructure | Severance
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1,139
Cost of Sales | Infrastructure | Other cash restructuring expenses
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1,847
Cost of Sales | Infrastructure | Impairments of fixed assets/net loss on disposals
Restructuring Cost and Reserve [Line Items]
Restructuring charges	3,751
Cost of Sales | Agriculture
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0
Cost of Sales | Agriculture | Severance
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0
Cost of Sales | Agriculture | Other cash restructuring expenses
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0
Cost of Sales | Agriculture | Impairments of fixed assets/net loss on disposals
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0
Cost of Sales | Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0
Cost of Sales | Corporate | Severance
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0
Cost of Sales | Corporate | Other cash restructuring expenses
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0
Cost of Sales | Corporate | Impairments of fixed assets/net loss on disposals
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0
Selling, General and Administrative Expenses
Restructuring Cost and Reserve [Line Items]
Restructuring charges	16,412
Selling, General and Administrative Expenses | Severance
Restructuring Cost and Reserve [Line Items]
Restructuring charges	13,794
Selling, General and Administrative Expenses | Other cash restructuring expenses
Restructuring Cost and Reserve [Line Items]
Restructuring charges	2,175
Selling, General and Administrative Expenses | Impairments of fixed assets/net loss on disposals
Restructuring Cost and Reserve [Line Items]
Restructuring charges	443
Selling, General and Administrative Expenses | Infrastructure
Restructuring Cost and Reserve [Line Items]
Restructuring charges	10,074
Selling, General and Administrative Expenses | Infrastructure | Severance
Restructuring Cost and Reserve [Line Items]
Restructuring charges	7,873
Selling, General and Administrative Expenses | Infrastructure | Other cash restructuring expenses
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1,852
Selling, General and Administrative Expenses | Infrastructure | Impairments of fixed assets/net loss on disposals
Restructuring Cost and Reserve [Line Items]
Restructuring charges	349
Selling, General and Administrative Expenses | Agriculture
Restructuring Cost and Reserve [Line Items]
Restructuring charges	2,968
Selling, General and Administrative Expenses | Agriculture | Severance
Restructuring Cost and Reserve [Line Items]
Restructuring charges	2,968
Selling, General and Administrative Expenses | Agriculture | Other cash restructuring expenses
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0
Selling, General and Administrative Expenses | Agriculture | Impairments of fixed assets/net loss on disposals
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0
Selling, General and Administrative Expenses | Other
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1,365
Selling, General and Administrative Expenses | Other | Severance
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1,192
Selling, General and Administrative Expenses | Other | Other cash restructuring expenses
Restructuring Cost and Reserve [Line Items]
Restructuring charges	79
Selling, General and Administrative Expenses | Other | Impairments of fixed assets/net loss on disposals
Restructuring Cost and Reserve [Line Items]
Restructuring charges	94
Selling, General and Administrative Expenses | Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring charges	2,005
Selling, General and Administrative Expenses | Corporate | Severance
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1,761
Selling, General and Administrative Expenses | Corporate | Other cash restructuring expenses
Restructuring Cost and Reserve [Line Items]
Restructuring charges	244
Selling, General and Administrative Expenses | Corporate | Impairments of fixed assets/net loss on disposals
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 0

CASH FLOW SUPPLEMENTARY INFOR_3

CASH FLOW SUPPLEMENTARY INFORMATION (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 25, 2021	Dec. 26, 2020
Noncash or Part Noncash Acquisitions [Line Items]
Interest	$ 46,653	$ 41,159	$ 40,209
Income taxes	$ 93,109	$ 60,366	54,801
Larson Camouflage
Noncash or Part Noncash Acquisitions [Line Items]
Consideration transferred			$ 1,046

INVENTORIES (Details)

INVENTORIES (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 25, 2021
Inventory Disclosure [Abstract]
Raw materials and purchased parts	$ 258,814	$ 278,107
Work-in-process	44,453	63,628
Finished goods and manufactured goods	425,495	387,099
Net inventory	$ 728,762	$ 728,834

PROPERTY, PLANT AND EQUIPMENT_2

PROPERTY, PLANT AND EQUIPMENT (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 25, 2021
Long-lived assets
Property, plant, and equipment, at cost	$ 1,433,151	$ 1,422,101
Land and improvements
Long-lived assets
Property, plant, and equipment, at cost	113,188	112,236
Buildings and improvements
Long-lived assets
Property, plant, and equipment, at cost	390,435	413,884
Machinery and equipment
Long-lived assets
Property, plant, and equipment, at cost	721,223	672,319
Transportation equipment
Long-lived assets
Property, plant, and equipment, at cost	30,610	27,020
Office furniture and equipment
Long-lived assets
Property, plant, and equipment, at cost	128,922	117,757
Construction in progress
Long-lived assets
Property, plant, and equipment, at cost	$ 48,773	$ 78,885

GOODWILL AND INTANGIBLE ASSET_2

GOODWILL AND INTANGIBLE ASSETS - Amortized Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 25, 2021	Dec. 31, 2022	Dec. 25, 2021	Dec. 26, 2020
Components of amortized intangible assets
Gross Carrying Amount	$ 290,680	$ 286,432	$ 290,680
Accumulated Amortization	178,723	169,602	178,723
Amortization expense for intangible assets		22,120	21,320	$ 18,147
Estimated Amortization Expense
2023		20,825
2024		18,888
2025		17,454
2026		12,933
2027		9,695
Customer Relationships
Components of amortized intangible assets
Gross Carrying Amount	224,597	222,716	224,597
Accumulated Amortization	160,626	$ 145,502	$ 160,626
Weighted Average Life		13 years	13 years
Impairment charge for intangible assets	4,483
Patents & Proprietary Technology
Components of amortized intangible assets
Gross Carrying Amount	58,699	$ 58,404	$ 58,699
Accumulated Amortization	13,955	$ 21,291	$ 13,955
Weighted Average Life		9 years	9 years
Trade Name
Components of amortized intangible assets
Gross Carrying Amount	2,850	$ 2,850	$ 2,850
Accumulated Amortization	183	$ 645	$ 183
Weighted Average Life		7 years	7 years
Other
Components of amortized intangible assets
Gross Carrying Amount	4,534	$ 2,462	$ 4,534
Accumulated Amortization	$ 3,959	$ 2,164	$ 3,959
Weighted Average Life		5 years	6 years

GOODWILL AND INTANGIBLE ASSET_3

GOODWILL AND INTANGIBLE ASSETS - Non-Amortized Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 25, 2021
Newmark
Non-amortized intangible assets
Carrying value of trade names	$ 11,111	$ 11,111
Webforge
Non-amortized intangible assets
Carrying value of trade names	7,107	7,877
Valmont SM
Non-amortized intangible assets
Carrying value of trade names		6,082
Ingal EPS/Ingal Civil Products
Non-amortized intangible assets
Carrying value of trade names	6,891	7,637
Shakespeare
Non-amortized intangible assets
Carrying value of trade names	4,000	4,000
Walpar
Non-amortized intangible assets
Carrying value of trade names	3,500	3,500
Conceal Fab
Non-amortized intangible assets
Carrying value of trade names	5,000
Convert
Non-amortized intangible assets
Carrying value of trade names	8,024	8,479
Other
Non-amortized intangible assets
Carrying value of trade names	14,152	14,721
Trade Name
Non-amortized intangible assets
Carrying value of trade names	$ 59,785	$ 63,407

GOODWILL AND INTANGIBLE ASSET_4

GOODWILL AND INTANGIBLE ASSETS - Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 25, 2021	Dec. 26, 2020
Goodwill [Line Items]
Goodwill, Gross		$ 770,388	$ 492,144
Accumulated impairment losses		(61,822)	(61,822)
Carrying amount of goodwill
Balance at the beginning of the period	$ 708,566	430,322
Acquisitions	42,465	284,253
Impairment	0
Foreign currency translation	(11,170)	(6,009)
Balance at the end of the period	739,861	708,566
Infrastructure
Goodwill [Line Items]
Goodwill, Gross		442,521	447,612
Accumulated impairment losses		(47,467)	(47,467)
Carrying amount of goodwill
Balance at the beginning of the period	395,054	400,145
Acquisitions	42,465
Foreign currency translation	(11,435)	(5,091)
Balance at the end of the period	426,084	395,054
Agriculture
Goodwill [Line Items]
Goodwill, Gross		313,512	30,177
Carrying amount of goodwill
Balance at the beginning of the period	313,512	30,177
Acquisitions		284,253
Foreign currency translation	265	(918)
Balance at the end of the period	$ 313,777	313,512
Other Segments
Goodwill [Line Items]
Goodwill, Gross		14,355	14,355
Accumulated impairment losses		$ (14,355)	$ (14,355)

GOODWILL AND INTANGIBLE ASSET_5

GOODWILL AND INTANGIBLE ASSETS - Narrative (Details) $ in Thousands		3 Months Ended	12 Months Ended
	Aug. 27, 2022 USD ($)	Dec. 25, 2021 USD ($)	Dec. 31, 2022 USD ($)	Dec. 26, 2020 USD ($) item
Indefinite-lived Intangible Assets
Number of trade names impaired | item				2
Goodwill impairment			$ 0
Trade Name
Indefinite-lived Intangible Assets
Impairment of intangible assets	$ 0			$ 3,900
Valmont SM
Indefinite-lived Intangible Assets
Impairment of intangible assets		$ 2,013

BANK CREDIT ARRANGEMENTS (Detai

BANK CREDIT ARRANGEMENTS (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 25, 2021
Bank Credit Arrangements
Outstanding amount	$ 5,846	$ 13,439
Short-term borrowings
Bank Credit Arrangements
Total line of credit facility for short-term borrowings	125,034
Outstanding amount	$ 5,846	$ 13,439
Weighted average interest rate on short-term borrowings	6.52%
Unused and available borrowings	$ 119,188

INCOME TAXES (Details)

INCOME TAXES (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 25, 2021	Dec. 26, 2020
Earnings before income taxes and equity in earnings of nonconsolidated subsidiaries
United States	$ 224,370	$ 202,051	$ 169,281
Foreign	139,518	58,032	23,487
Earnings before income taxes	363,888	260,083	192,768
Current:
Federal	48,309	30,031	30,431
State	11,888	8,891	8,302
Foreign	48,273	20,644	12,730
Total	108,470	59,566	51,463
Non-current:	1,442	1,777	(451)
Deferred:
Federal	(7,544)	4,587	(6,086)
State	(1,973)	558	(822)
Foreign	8,292	(5,074)	5,511
Total	(1,225)	71	(1,397)
Total income tax expense (benefit)	$ (108,687)	$ (61,414)	$ (49,615)
Reconciliations of statutory federal income tax rate and effective tax rate
Statutory federal income tax rate	21%	21%	21%
State income taxes, net of federal benefit	2.30%	2.90%	3.50%
Carryforwards, credits and changes in valuation allowances	1%	1.50%	(1.60%)
Foreign tax rate differences	4.20%	(0.10%)	(1.70%)
Changes in unrecognized tax benefits	0.30%	0.70%	0.20%
Goodwill and intangible impairment	0%	0%	2.40%
Loss on divestiture of offshore wind energy structures business	2.20%
Other	(1.10%)	(2.40%)	1.90%
Total	29.90%	23.60%	25.70%
Deferred income tax assets:
Accrued expenses and allowances	$ 33,577	$ 21,241
Tax credits and loss carryforwards	67,249	83,690
Defined benefit pension liability		134
Inventory allowances	7,912	2,818
Accrued compensation and benefits	24,398	24,302
Lease liabilities	40,709	41,128
Deferred compensation	16,308	10,893
Gross deferred income tax assets	190,153	184,206
Valuation allowance	(48,974)	(54,256)
Net deferred income tax assets	141,179	129,950
Deferred income tax liabilities:
Property, plant and equipment	45,300	37,686
Intangible assets	52,750	48,244
Defined benefit pension asset	6,054	0
Lease assets	40,708	41,128
Other deferred tax liabilities	4,941	5,041
Total deferred income tax liabilities	149,753	132,099
Net deferred income tax asset (liability)	8,574	2,149
Deferred income tax assets (liabilities), Balance Sheet Caption
Other assets	32,517	45,700
Deferred income taxes	(41,091)	(47,849)
Net deferred income tax asset (liability)	8,574	2,149
Tax expense related to the divestiture of the offshore wind energy structures business	8,166
Benefit recorded	0
Income tax benefits related to foreign taxes paid		(1,894)
Income tax expense due to nondeductible restructuring charges			$ 1,100
Valuation allowance		5,102
Income tax expense due to nondeductible goodwill impairment			4,651
Tax credit and net operating loss carryforwards related to the defined benefit pension obligation	67,249	83,690
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Gross Unrecognized Tax Benefits beginning of year	2,664	1,864
Gross increases-tax positions in prior period	1,133	1,315
Gross decreases-tax positions in prior period		(6)
Gross increases-currentperiod tax positions	523	240
Settlements with taxing authorities	(1,576)	0
Lapse of statute of limitations	(208)	(749)
Gross Unrecognized Tax Benefits end of year	2,536	2,664	$ 1,864
Uncertain tax positions for which reversal is reasonably possible during the next 12 months	1,141
Reduction of income tax expense, due to expiration of statutes of limitation	165	592
Accrued interest and penalties relating to unrecognized tax benefits	172	1,758
Unrecognized tax benefits that, if recognized, would affect effective tax rate	2,447	4,324
Valuation Allowance [Line Items]
Valuation allowance	$ 48,974	54,256
Denmark
Deferred income tax assets:
Valuation allowance		(5,102)
Valuation Allowance [Line Items]
Valuation allowance		5,102
Prospera
Deferred income tax assets:
Valuation allowance		(6,472)
Valuation Allowance [Line Items]
Valuation allowance		$ 6,472

LONG-TERM DEBT (Details)

LONG-TERM DEBT (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 25, 2021
Long-term debt:
Debt issuance costs	$ (6,918,000)	$ (7,189,000)
Total long-term debt	872,129,000	951,956,000
Less current installments of long-term debt	1,194,000	4,884,000
Long-term debt, excluding current installments	870,935,000	947,072,000
Minimum aggregate maturities of long-term debt
2023	1,194,000
2024	860,000
2025	679,000
2026	141,081,000
2027	$ 10,000
Senior Unsecured Notes 5.00% Due 2044
Long-term debt:
Interest rate on notes	5%
Redemption price of notes, stated as a percentage of principal amount	100%
Senior Unsecured Notes 5.25% Due 2054
Long-term debt:
Aggregate amount	$ 305,000,000
Interest rate on notes	5.25%
Unamortized debt discount	$ 7,233,000
Redemption price of notes, stated as a percentage of principal amount	100%
Unamortized discount on 5.00% and 5.25% senior unsecured notes
Long-term debt:
Unamortized premium on senior unsecured notes	$ (20,053,000)	(20,436,000)
Revolving credit agreement
Long-term debt:
Total long-term debt	140,513,000	$ 218,897,000
Outstanding line of credit	162,000
Unused and available borrowings	$ 659,401,000
Revolving credit agreement | Minimum
Long-term debt:
Basis points added to variable rate	0%
Revolving credit agreement | Maximum
Long-term debt:
Basis points added to variable rate	0.625%
Revolving credit agreement | Prime lending rate
Long-term debt:
Variable interest rate basis	prime lending rate
Revolving credit agreement | Federal Funds rate
Long-term debt:
Variable interest rate basis	overnight bank rate
Basis points added to variable rate	0.50%
Revolving credit agreement | LIBOR
Long-term debt:
Basis points added to variable rate	1%
Debt instrument	SOFR (based on a 1-, 3-, or 6-month interest period, as selected by the Company)
Revolving credit agreement | LIBOR | Minimum
Long-term debt:
Basis points added to variable rate	1%
Revolving credit agreement | LIBOR | Maximum
Long-term debt:
Basis points added to variable rate	162.50%
Revolving credit agreement | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Long-term debt:
Basis points added to variable rate	0.10%
Variable interest rate, base period	1 month
Revolving credit agreement | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | Minimum
Long-term debt:
Basis points added to variable rate	1%
Revolving credit agreement | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | Maximum
Long-term debt:
Basis points added to variable rate	1.625%	1.625%
Other notes
Long-term debt:
Total long-term debt	$ 3,587,000	$ 5,684,000
Short Term Bank Lines Of Credit
Long-term debt:
Balance	125,034,000
Unused and available borrowings	119,188,000
Senior Unsecured Notes 5.00% Due 2044 | Senior Notes
Long-term debt:
Aggregate amount	450,000,000	450,000,000
Unamortized debt discount	12,820,000
Senior Unsecured Notes 5.25% Due 2054 | Senior Notes
Long-term debt:
Aggregate amount	305,000,000	$ 305,000,000
Revolving Credit Facility
Long-term debt:
Total line of credit facility for short-term borrowings	800,000,000
Additional borrowing capacity	300,000,000
Unused and available borrowings	400,000,000
Revolving Credit Facility | Revolving credit agreement
Long-term debt:
Outstanding line of credit	$ 140,513,000

STOCK-BASED COMPENSATION (Detai

STOCK-BASED COMPENSATION (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 25, 2021	Dec. 26, 2020
Stock Based Compensation
Shares of common stock available for issuance	1,722,643
Number of Shares
Exercised (in shares)	(121,163)	(169,908)	(147,014)
Share-based Payment Arrangement, Option
Stock Based Compensation
Compensation expense	$ 3,120	$ 2,538	$ 2,628
Tax benefits associated with compensation expense	$ 10,463	$ 7,180	$ 3,719
Weighted average period over which unrecognized stock option compensation cost would be recognized	2 years 4 months 13 days
Unrecognized stock option compensation expense	$ 6,814
Assumptions used in estimating fair value of each option grant
Expected volatility	32.36%	33.01%	33.72%
Risk-free interest rate	3.75%	1.26%	0.43%
Expected life from vesting date	5 years 4 months 24 days	4 years	4 years
Dividend yield	1.10%	1.20%	1.24%
Number of Shares
Balance at the beginning of the period (in shares)	276,464	399,565	488,560
Granted (in shares)	40,564	47,223	66,231
Exercised (in shares)	(121,163)	(169,908)	(147,014)
Forfeited (in shares)	(175)	(416)	(8,212)
Balance at the end of the period (in shares)	195,690	276,464	399,565
Options vested or expected to vest (in shares)	189,267	268,338	389,633
Options exercisable (in shares)	90,556	154,860	254,498
Weighted Average Exercise Price
Balance at the beginning of the period (in dollars per share)	$ 164.48	$ 141.79	$ 133.13
Granted (in dollars per share)	332.63	252.89	168.80
Exercised (in dollars per share)	139.89	135.76	125.43
Forfeited (in dollars per share)	104.47	132.84	137.49
Balance at the end of the period (in dollars per share)	214.62	164.48	141.79
Options vested or expected to vest (in dollars per share)	212.69	163.42	141.56
Options exercisable (in dollars per share)	$ 172.08	$ 142.15	$ 138.64
Weighted Average Remaining Contractual Term
Options outstanding	7 years 6 months 10 days	5 years 10 months 17 days	4 years 10 months 17 days
Options vested or expected to vest	7 years 5 months 23 days	5 years 9 months 18 days	4 years 9 months 21 days
Options exercisable	6 years 4 months 24 days	4 years	3 years 4 months 17 days
Aggregate Intrinsic Value
Options outstanding	$ 22,644	$ 22,586	$ 12,103
Options vested or expected to vest	22,261	22,188	11,890
Options exercisable	$ 14,276	$ 15,896	$ 8,510
Other option disclosures
Weighted average per share fair value of option granted	$ 104.01	$ 67.81	$ 45.49
Share-based Payment Arrangement, Option | Maximum
Stock Based Compensation
Expiration period of grant	10 years
Share-based Payment Arrangement, Option | Minimum
Stock Based Compensation
Vesting period of options	3 years
Expiration period of grant	7 years
Restricted Stock and Awards
Stock Based Compensation
Compensation expense	$ 41,850	$ 28,720	$ 14,874
Assumptions used in estimating fair value of each option grant
Expected life from vesting date	3 years

STOCK-BASED COMPENSATION - Sche

STOCK-BASED COMPENSATION - Schedule of Non-Vested Stock and Restricted Stock Units (Details) - Directors and certain management employees - Non-vested stock and restricted stock units - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2022	Dec. 25, 2021	Dec. 26, 2020
Stock Based Compensation
Shares granted		60,901	216,971	85,251
Weightedaverage per share price on grant date		$ 313.75	$ 236.28	$ 161.73
Recognized compensation expense		$ 22,664	$ 16,147	$ 9,081
Weighted-average period for grant of stock-based compensation		2 years 8 months 23 days
Deferred stock-based compensation granted		$ 50,422
Prospera
Stock Based Compensation
Shares granted	159,982
Recognized compensation expense	$ 36,916
Vesting period of options	4 years

STOCK- BASED COMPENSATION - Per

STOCK- BASED COMPENSATION - Performance-based Restricted Stock Units (Details) - Performance-based Restricted Stock Unit - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 25, 2021	Dec. 26, 2020
Stock Based Compensation
Vesting period of performance-based stock units	3 years	3 years
Shares granted	33,736	41,060	35,181
Weightedaverage per share price on grant date	$ 215.15	$ 230.40	$ 125.41
Recognized compensation expense	$ 16,066	$ 10,035	$ 3,165
Minimum
Stock Based Compensation
Performance target (percent)	0%
Maximum
Stock Based Compensation
Performance target (percent)	200%

EARNINGS PER SHARE - Schedule o

EARNINGS PER SHARE - Schedule of Reconciliation of Basic and Diluted Earnings Per Share (EPS) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 25, 2021	Dec. 26, 2020
Basic EPS
Net earnings attributable to Valmont Industries, Inc.	$ 250,863	$ 195,630	$ 140,693
Shares outstanding basic (in shares)	21,311	21,193	21,315
Per share amount basic (in dollars per share)	$ 11.77	$ 9.23	$ 6.60
Dilutive Effect of Stock Options
Dilutive Effect of Stock Options	$ 0	$ 0	$ 0
Dilutive effect of stock options number of shares (in shares)	269	300	110
Dilutive effect of stock options (in dollars per share)	$ (0.15)	$ (0.13)	$ (0.03)
Diluted EPS
Diluted EPS	$ 250,863	$ 195,630	$ 140,693
Shares outstanding dilutive (in shares)	21,580	21,493	21,425
Per share amount diluted (in dollars per share)	$ 11.62	$ 9.10	$ 6.57

EARNINGS PER SHARE - Narrative

EARNINGS PER SHARE - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 25, 2021	Dec. 26, 2020
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Loss from divestiture of offshore wind energy structures business	$ (33,273)
Associated tax benefit	0
Impairment of goodwill & intangible assets	27,900
Restructuring expenses	$ 23,149
Outstanding stock options with exercise prices exceeding the market price of common stock, excluded from the computation of diluted earnings per share (in shares)	40,564	47,223	0
Valmont SM, Offshore Wind Business [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Associated tax benefit	$ 0
Valuation allowance		$ 5,076
Valuation allowance (in dollars per share)		$ 0.24
Offshore and Other Complex Steel Structures | Valmont SM, Offshore Wind Business [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Loss from divestiture of offshore wind energy structures business	$ 33,273
Loss from divestiture of offshore wind energy structures business, per share	$ 1.54
Goodwill And Indefinite-lived Intangible Assets
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Impairment of goodwill & intangible assets			$ 16,220
Impairment of goodwill and intangible assets (in dollars per share)			$ 0.76
long | Valmont SM, Offshore Wind Business [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Impairment of goodwill & intangible assets		$ 21,678
Impairment of goodwill and intangible assets (in dollars per share)		$ 1.01
2020 Restructuring Plan
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Restructuring expenses			$ 17,324
Restructuring expenses, (in dollars per share)			$ 0.81

EMPLOYEE RETIREMENT SAVINGS P_2

EMPLOYEE RETIREMENT SAVINGS PLAN (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 25, 2021	Dec. 26, 2020
Retirement Benefits [Abstract]
Employee contribution limit per calendar year to 401 (k) plan	60%
Company contributions	$ 18,300	$ 16,000	$ 14,800
Assets related to non-qualified deferred compensation plan included in other assets	25,008	29,982
Total amount distributed from non-qualified deferred compensation plan	$ 4,691	$ 8,900

DISCLOSURES ABOUT THE FAIR VA_3

DISCLOSURES ABOUT THE FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 25, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets recorded for the investments held	$ 25,008	$ 29,982
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	25,008	30,076
Marketable Securities	0
Mutual funds	7,205
Derivative financial instruments, net	0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0	0
Marketable Securities	136
Mutual funds	0
Derivative financial instruments, net	1,404	4,007
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0	0
Marketable Securities	0
Mutual funds	0
Derivative financial instruments, net	0	0
Reported Value Measurement [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	872,129	951,956
Trading securities	25,008	30,076
Marketable Securities	136
Mutual funds	7,205
Derivative financial instruments, net	1,404	4,007
Estimate of Fair Value Measurement [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	807,281	1,175,332
Delta E M D Pty Ltd [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of remaining ownership	0	94
Valmont Deferred Compensation Plan [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets recorded for the investments held	25,008	29,982
Liabilities recorded for the investments held	$ 25,008	$ 29,982

DERIVATIVE FINANCIAL INSTRUME_3

DERIVATIVE FINANCIAL INSTRUMENTS - Fair Value of Derivatives (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 25, 2021	Dec. 26, 2020
Derivatives, Fair Value [Line Items]
Derivative assets (liabilities), at fair value, net	$ 1,404	$ (4,007)
Derivative, gain (loss) on derivative, net	2,381	28,497	$ 4,459
Commodity forward contracts | Accrued expenses
Derivatives, Fair Value [Line Items]
Derivative assets (liabilities), at fair value, net	(3,854)	(5,802)
Foreign currency forward contracts | Prepaid expenses and other assets
Derivatives, Fair Value [Line Items]
Derivative assets (liabilities), at fair value, net	83	149
Foreign currency forward contracts | Accrued expenses
Derivatives, Fair Value [Line Items]
Derivative assets (liabilities), at fair value, net	0	(118)
Cross currency swap contracts | Prepaid expenses and other assets
Derivatives, Fair Value [Line Items]
Derivative assets (liabilities), at fair value, net	5,385	1,764
Cross currency swap contracts | Accrued expenses
Derivatives, Fair Value [Line Items]
Derivative assets (liabilities), at fair value, net	$ (210)	$ 0

DERIVATIVE FINANCIAL INSTRUME_4

DERIVATIVE FINANCIAL INSTRUMENTS - Gain (Loss) on Derivatives (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 25, 2021	Dec. 26, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, gain (loss) on derivative, net	$ 2,381	$ 28,497	$ 4,459
Commodity forward contracts | Product cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, gain (loss) on derivative, net	(5,212)	25,821	0
Foreign currency forward contracts | Product Sales
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, gain (loss) on derivative, net	0	0	1,598
Foreign currency forward contracts | Other income
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, gain (loss) on derivative, net	(45)	(40)	187
Interest rate contracts | Interest expense
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, gain (loss) on derivative, net	(64)	(64)	(64)
Cross currency swap contracts | Loss from divestiture of wind energy structures business
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, gain (loss) on derivative, net	4,827	0	0
Cross currency swap contracts | Interest expense
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, gain (loss) on derivative, net	$ 2,875	$ 2,780	$ 2,738

DERIVATIVE FINANCIAL INSTRUME_5

DERIVATIVE FINANCIAL INSTRUMENTS - Narrative (Details) € in Thousands, $ in Thousands	3 Months Ended					12 Months Ended
	Dec. 31, 2022 USD ($) T	Sep. 24, 2022 USD ($) T	Jun. 25, 2022 USD ($) T	Jun. 27, 2020 USD ($)	Jun. 29, 2019 EUR (€)	Dec. 25, 2021 USD ($) T	Dec. 25, 2021 EUR (€)	Dec. 26, 2020 USD ($)	Dec. 26, 2020 EUR (€)	Dec. 28, 2019 USD ($) derivative	Jun. 29, 2019 USD ($) derivative
Cash Flow Hedging | Designated as Hedging Instrument | Long
Derivative [Line Items]
Derivative, nonmonetary notional amount, mass | T	620,000
Cash Flow Hedging | Designated as Hedging Instrument | Commodity forward contracts | Long
Derivative [Line Items]
Derivative, notional amount	$ 7,043
Derivative, nonmonetary notional amount, mass | T	1,230,000
Cash Flow Hedging | Designated as Hedging Instrument | Steel hot rolled coil ("HRC") forward contracts | Long
Derivative [Line Items]
Derivative, notional amount	$ 9,766		$ 14,010			$ 93,498
Derivative, nonmonetary notional amount, mass | T	10,300		15,000			86,100
Cash Flow Hedging | Designated as Hedging Instrument | Foreign currency forward contracts
Derivative [Line Items]
Derivative, notional amount		$ 5,211
Derivative, nonmonetary notional amount, mass | T		770,000
Cash Flow Hedging | Designated as Hedging Instrument | A2022 commodity contract | Long
Derivative [Line Items]
Derivative, notional amount	$ 3,088
Net Investment Hedging | Cross currency swap contracts
Derivative [Line Items]
Derivative, notional amount											$ 80,000
Senior Unsecured Notes 5.00% Due 2044 | Cross currency swap contracts | Senior Notes [Member]
Derivative [Line Items]
Derivative, number of instruments held | derivative											2
Stated rate											5%
Senior Unsecured Notes 5.00% Due 2044 | Net Investment Hedging | Cross currency swap contracts | Senior Notes [Member]
Derivative [Line Items]
Derivative, notional amount										$ 130,000
Derivative, number of instruments held | derivative										2
Other comprehensive income (loss), foreign currency transaction upon sale or liquidation, net of tax	3,620		$ 3,532
Other Comprehensive Income (Loss) before Tax	$ 4,827
Australia, Dollars | Net Investment Hedging | Designated as Hedging Instrument | Foreign currency forward contracts
Derivative [Line Items]
Other comprehensive income (loss), foreign currency transaction upon sale or liquidation, net of tax				$ 11,983
Euro Member Countries, Euro | Cash Flow Hedging | Designated as Hedging Instrument | Foreign currency forward contracts
Derivative [Line Items]
Derivative, notional amount		$ 1,800				$ 2,000	€ 3,800	$ 27,500	€ 4,500
Euro Member Countries, Euro | Net Investment Hedging | Cross currency swap contracts
Derivative [Line Items]
Received proceeds | €					€ 71,550

DERIVATIVE FINANCIAL INSTRUME_6

DERIVATIVE FINANCIAL INSTRUMENTS - Schedule of Notional Amounts Outstanding (Details) - 3 months ended Jun. 29, 2019 - Net Investment Hedging € in Thousands, $ in Thousands	EUR (€)	USD ($)
Cross currency swap contracts
Derivative [Line Items]
Derivative, notional amount | $		$ 80,000
Euro Member Countries, Euro
Derivative [Line Items]
Swapped Interest Rate		2.825%
Euro Member Countries, Euro | Cross currency swap contracts
Derivative [Line Items]
Set Settlement Amount | €	€ 71,550

GUARANTEES (Details)

GUARANTEES (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 25, 2021
Changes in the product warranty accrual recorded in accrued expenses
Balance, beginning of period	$ 21,308	$ 14,787
Payments made	(10,569)	(6,444)
Change in liability for warranties issued during the period	12,866	13,534
Change in liability for pre-existing warranties	(3,832)	(569)
Balance, end of period	$ 19,773	$ 21,308

DEFINED BENEFIT RETIREMENT PL_3

DEFINED BENEFIT RETIREMENT PLAN (Details) £ in Thousands, $ in Thousands	12 Months Ended				24 Months Ended
	Dec. 31, 2022 USD ($) item $ / £	Dec. 31, 2022 GBP (£) item	Dec. 25, 2021 USD ($) $ / £	Dec. 26, 2020 USD ($)	Dec. 31, 2022 USD ($) $ / £
Retirement Benefits [Abstract]
Pension retirement benefits to qualified employees as percent of final salary per year of service	1.67%	1.67%
Eligibility age	65 years	65 years
Active members of defined benefit retirement income plan | item	0	0
Foreign currency exchange rate used to translate the net pension liability | $ / £	1.209		1.356		1.209
Projected Benefit Obligation
Beginning balance	$ 761,706		$ 860,173		$ 860,173
Interest cost	12,551		9,896
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Interest Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]					Interest Expense
Benefits paid	(20,175)		(22,952)
Actuarial (gain) loss	(248,252)		(77,379)
Currency translation	(70,119)		(8,032)
Ending balance	435,711		761,706	$ 860,173	$ 435,711
Plan Assets
Fair value beginning balance	761,170		741,650		741,650
Employer contributions	17,155		1,924
Actual return on plan assets	(228,493)		48,637
Benefits paid	(20,175)		(22,952)
Currency translation	(69,730)		(8,089)
Fair value ending balance	459,927		761,170	741,650	459,927
Funded status
Funded status	24,216		(536)	(118,523)	24,216
Accumulated other comprehensive income (loss)
Balance at the beginning of the period	(60,940)		(165,258)		(165,258)
Actuarial gain (loss)	(2,915)		102,529		(2,915)
Currency translation gain	5,451		1,239		5,451
Prior service costs amortization	493		550		493
Balance at the end of the period	$ (57,911)		$ (60,940)	$ (165,258)	$ (57,911)
Weighted average actuarial assumptions used to determine the benefit obligation
Discount rate for benefit obligations	4.80%		1.90%		4.80%
CPI inflation	2.35%		2.70%		2.35%
RPI inflation	3.25%		3.30%		3.25%
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Interest cost	$ 12,551		$ 9,896
Expected return on plan assets	$ (23,131)		$ (27,763)
Defined Benefit Plan Net Periodic Benefit Cost Credit Expected Return Loss Statement Of Income Or Comprehensive Income Extensible List Not Disclosed Flag	true	true	true
Amortization of prior service cost	$ 493		$ 550
Amortization of actuarial loss			2,750
Defined Benefit Plan Net Periodic Benefit Cost Credit Amortization Of Gain Loss Statement Of Income Or Comprehensive Income Extensible List Not Disclosed Flag				true
Net periodic benefit	$ (10,087)		$ (14,567)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Amortization of Prior Service Cost (Credit), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)
Weighted average actuarial assumptions used to determine expense
Discount rate for benefit obligations	1.90%	1.90%	1.40%
Discount rate for interest cost	1.80%	1.80%	1.15%
Expected return on plan assets	3.48%	3.48%	3.96%
CPI Inflation	2.70%	2.70%	2%
RPI Inflation	3.30%	3.30%	2.90%
Limit on employer contributions per annum	$ 16,000	£ 13,100
Administrative costs of the Plan	1,600	£ 1,300
Expected pension benefit payments
2023	20,432				$ 20,432
2024	21,036				21,036
2025	21,641				21,641
2026	22,366				22,366
2027	22,970				22,970
Years 2028 - 2032	$ 125,733				$ 125,733
Weighted average maturity period of corporate bond portfolio	13 years	13 years

DEFINED BENEFIT RETIREMENT PL_4

DEFINED BENEFIT RETIREMENT PLAN - Additional Information (Details) £ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($)	Dec. 31, 2022 GBP (£)	Dec. 25, 2021 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Limit on employer contributions per annum	$ 16,000	£ 13,100
Administrative costs of the Plan	1,600	£ 1,300
Plan assets	459,927		$ 761,170
Estimate of Fair Value Measurement [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets	5,916		14,000
Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets	5,916		14,000
Fair Value Measured at Net Asset Value Per Share [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets	$ 454,011		747,170
Mutual Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation percentage	50%
Defined Benefit Plan, Cash and Cash Equivalents [Member] | Estimate of Fair Value Measurement [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets	$ 5,916		14,000
Defined Benefit Plan, Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets	5,916		14,000
Defined Benefit Plan, Equity Securities [Member] | Estimate of Fair Value Measurement [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets	55,379		212,730
ICAP MTF - GILTS [Member] | Estimate of Fair Value Measurement [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets	206,555		283,288
Corporate Debt Securities [Member] | Estimate of Fair Value Measurement [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets	63,953		107,945
Private Equity Funds [Member] | Estimate of Fair Value Measurement [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets	$ 128,124		$ 143,207

LEASES (Details)

LEASES (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 25, 2021	Dec. 31, 2022
Lessee, Lease, Description [Line Items]
Lease renewal term		10 years
After tax adjustment to retained earnings	$ 1,386,847	$ 1,580,847
Operating Lease, Right-of-Use Asset	152,664	162,930
Operating lease liabilities	$ 164,513	$ 172,326
Building
Lessee, Lease, Description [Line Items]
Remaining lease term	25 years
Operating Lease, Expense	$ 5,100
Operating lease not yet commenced, annual increase (percent)	2%
Operating Lease, Right-of-Use Asset	$ 71,853
Operating lease liabilities	$ 71,196
Minimum
Lessee, Lease, Description [Line Items]
Remaining lease term		1 year
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease term		25 years

LEASES - Schedule of Lease Cost

LEASES - Schedule of Lease Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 25, 2021
Leases [Abstract]
Operating lease cost	$ 31,062	$ 27,421
Operating cash outflows from operating leases	33,150	27,793
ROU assets obtained in exchange for lease obligations	$ 27,480	$ 86,481
Weighted average remaining lease term	17 years	17 years
Weighted average discount rate	4.20%	4%
Short-term lease cost	$ 1,600
Variable lease payments	$ 4,400

LEASES - Schedule of Assets and

LEASES - Schedule of Assets and Liabilities Lessee (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 25, 2021
Leases [Abstract]
Operating lease assets	$ 162,930	$ 152,664
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Other assets	Other assets
Operating lease short-term liabilities	$ 16,857	$ 16,754
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Other accrued expenses	Other accrued expenses
Operating lease long-term liabilities	$ 155,469	$ 147,759
Total lease liabilities	$ 172,326	$ 164,513

LEASES -Schedule of Future Mini

LEASES -Schedule of Future Minimum Lease Payments (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 25, 2021
Leases [Abstract]
2023	$ 23,815
2024	20,689
2025	19,615
2026	17,333
2027	13,924
Subsequent	147,767
Total minimum lease payments	243,143
Less: Interest	70,817
Present value of minimum lease payments	$ 172,326	$ 164,513

BUSINESS SEGMENTS (Details)

BUSINESS SEGMENTS (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($) segment	Dec. 24, 2022 USD ($) segment	Dec. 25, 2021 USD ($)	Dec. 26, 2020 USD ($)
Business Segments
Number of reportable segments | segment	2	2
Net sales	$ 4,345,250	$ 4,345,250	$ 3,501,575	$ 2,895,355
Operating income	433,249	433,249	286,785	225,953
Interest expense, net	(45,519)		(41,420)	(38,701)
Loss from divestiture of offshore wind energy structures business	(33,273)
Other	9,431		14,718	5,516
Earnings before income taxes	363,888		260,083	192,768
Total assets	3,556,996		3,447,249	2,953,160
Capital expenditures	93,288		107,790	106,700
Depreciation and amortization	97,167		92,577	82,892
Point in Time
Business Segments
Net sales	2,995,139		2,384,575	1,921,328
Lighting And Transportation [Member]
Business Segments
Net sales	940,462			797,335
Transmission, Distribution and Substation [Member]
Business Segments
Net sales	1,184,660		935,099	795,693
Coatings [Member]
Business Segments
Net sales	341,380		299,072	269,546
Telecommunications [Member]
Business Segments
Net sales	320,342		238,527	186,244
Irrigation Equipment and Parts, excluding Technology [Member]
Business Segments
Net sales	1,220,200		919,190	572,947
Technology Products and Services [Member]
Business Segments
Net sales	115,085		97,859	67,145
Renewable Energy [Member]
Business Segments
Net sales	223,121		185,905	206,445
Lighting, Traffic, and Highway Safety Products
Business Segments
Net sales			825,923
North America
Business Segments
Net sales	2,975,020		2,247,862	1,940,946
International
Business Segments
Net sales	1,370,230		1,253,713	954,409
Coatings
Business Segments
Operating income		$ (102,772)	(83,648)	(66,265)
Total assets	176,608		249,534	416,552
Corporate
Business Segments
Operating income	(102,772)		(83,648)	(66,265)
Capital expenditures	7,174		17,807	8,886
Depreciation and amortization	9,695		9,028	5,961
New Management Structure [Member]
Business Segments
Number of reportable segments | segment		3
Agriculture
Business Segments
Number of reportable segments | segment		2
Net sales		$ 1,335,285	1,017,050	640,092
Operating income	179,263	179,263	137,027	83,046
Total assets	1,112,588		1,027,272	465,322
Capital expenditures	32,886		17,509	16,740
Depreciation and amortization	23,681		17,813	12,098
Agriculture | Point in Time
Business Segments
Net sales	1,307,681		996,278	624,831
Infrastructurre [Member]
Business Segments
Net sales		2,909,746	2,361,524	2,135,200
Operating income	354,499	354,499	273,598	217,364
Total assets	2,267,800		2,102,851	1,933,970
Capital expenditures	53,228		72,129	81,074
Depreciation and amortization	$ 62,398		59,748	58,985
Other Segments
Business Segments
Number of reportable segments | segment	2
Net sales		100,219	123,001	120,063
Operating income	$ 2,259	2,259	(40,192)	(8,192)
Total assets			67,592	137,316
Capital expenditures			345
Depreciation and amortization	1,393		5,988	5,848
Operating segment
Business Segments
Net sales		4,375,310	3,523,818	2,907,635
Operating segment | Agriculture
Business Segments
Net sales	1,346,672	1,346,672	1,028,717	645,831
Operating segment | Agriculture | Irrigation Equipment and Parts, excluding Technology [Member]
Business Segments
Net sales	1,231,587		930,858	578,686
Operating segment | Agriculture | Technology Products and Services [Member]
Business Segments
Net sales	115,085		97,859	67,145
Operating segment | Agriculture | North America
Business Segments
Net sales	766,929		545,574	378,424
Operating segment | Agriculture | International
Business Segments
Net sales	579,743		483,143	267,407
Operating segment | Infrastructurre [Member]
Business Segments
Net sales	2,928,419	2,928,419	2,372,100	2,141,741
Operating segment | Infrastructurre [Member] | Lighting And Transportation [Member]
Business Segments
Net sales	940,462			797,335
Operating segment | Infrastructurre [Member] | Transmission, Distribution and Substation [Member]
Business Segments
Net sales	1,184,660		935,099	795,693
Operating segment | Infrastructurre [Member] | Coatings [Member]
Business Segments
Net sales	356,707		309,647	276,087
Operating segment | Infrastructurre [Member] | Telecommunications [Member]
Business Segments
Net sales	320,342		238,527	186,244
Operating segment | Infrastructurre [Member] | Renewable Energy [Member]
Business Segments
Net sales	126,248		62,904	86,382
Operating segment | Infrastructurre [Member] | Lighting, Traffic, and Highway Safety Products
Business Segments
Net sales			825,923
Operating segment | Infrastructurre [Member] | North America
Business Segments
Net sales	2,234,339		1,724,531	1,574,802
Operating segment | Infrastructurre [Member] | International
Business Segments
Net sales	694,080		647,569	566,939
Operating segment | Other Segments
Business Segments
Net sales	100,219	100,219	123,001	120,063
Operating segment | Other Segments | Renewable Energy [Member]
Business Segments
Net sales	100,219		123,001	120,063
Operating segment | Other Segments | International
Business Segments
Net sales	100,219		123,001	120,063
Intersegment
Business Segments
Net sales	(30,060)	(30,060)	(22,243)	(12,280)
Intersegment | Coatings [Member]
Business Segments
Net sales	(15,327)		(10,575)	(6,541)
Intersegment | Irrigation Equipment and Parts, excluding Technology [Member]
Business Segments
Net sales	(11,387)		(11,668)	(5,739)
Intersegment | Renewable Energy [Member]
Business Segments
Net sales	(3,346)
Intersegment | North America
Business Segments
Net sales	(26,248)		(22,243)	(12,280)
Intersegment | International
Business Segments
Net sales	$ (3,812)
Intersegment | Agriculture
Business Segments
Net sales		(11,387)	(11,667)	(5,739)
Intersegment | Infrastructurre [Member]
Business Segments
Net sales		$ (18,673)	$ (10,576)	$ (6,541)

BUSINESS SEGMENTS - Summary by

BUSINESS SEGMENTS - Summary by Geographical Area by Location (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 24, 2022	Dec. 25, 2021	Dec. 26, 2020
Business Segments
Net sales	$ 4,345,250	$ 4,345,250	$ 3,501,575	$ 2,895,355
Long-lived assets	1,776,411		1,734,486	1,398,535
United States
Business Segments
Net sales	2,965,673		2,260,198	1,919,136
Long-lived assets	1,246,956		1,172,552	748,886
Australia
Business Segments
Net sales	292,072		297,720	252,253
Long-lived assets	$ 82,290		173,240	179,673
Australia | Net Sales | Foreign country
Business Segments
Threshold for disclosure as percentage of net sales by customer	7%
Brazil
Business Segments
Net sales	$ 354,497		200,402	103,591
Long-lived assets	$ 42,259		28,583	17,151
Brazil | Net Sales | Foreign country
Business Segments
Threshold for disclosure as percentage of net sales by customer	8%
Denmark
Business Segments
Net sales	$ 100,219		123,001	120,063
Long-lived assets			21,232	61,546
Other
Business Segments
Net sales	632,789		620,254	500,312
Long-lived assets	$ 404,906		$ 338,879	$ 391,279