REVENUES FROM CONTRACTS WITH CUSTOMERS - Contract Assets and Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended
Apr. 30, 2026	Apr. 30, 2025	Jan. 31, 2026
REVENUES FROM CONTRACTS WITH CUSTOMERS
Revenues recognized from contract liabilities	$ 222,618	$ 146,520
Retained amounts by project owners	$ 69,400		$ 54,500

Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 8
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-8

Name:	us-gaap_ContractWithCustomerLiabilityRevenueRecognized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration