SEGMENT REPORTING (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2026	Apr. 30, 2025	Jan. 31, 2026
Segment Reporting Information
Revenues	$ 290,954	$ 193,660
Cost of revenues	229,840	156,797
Gross profit	61,114	36,863
Selling, general and administrative expenses	15,719	12,521
Income (loss) from operations	45,395	24,342
Other income (loss), net	8,374	5,444
Income before income taxes	53,769	29,786
Provision for income taxes	7,706	7,236
Net income	46,063	22,550
Amortization of intangibles	75	98
Depreciation	559	415
Property, plant and equipment additions	2,433	395
Current assets	1,216,108	738,077	$ 1,132,257
Current liabilities	794,689	422,950	711,257
Goodwill	28,033	28,033	28,033
Total assets	1,286,438	792,155	1,186,354
Operating Segments
Segment Reporting Information
Revenues	290,954	193,660
Cost of revenues	229,840	156,797
Gross profit	61,114	36,863
Selling, general and administrative expenses	12,354	9,316
Income (loss) from operations	48,760	27,547
Other income (loss), net	7,875	4,404
Income before income taxes	56,635	31,951
Amortization of intangibles	75	98
Depreciation	556	412
Property, plant and equipment additions	2,433	315
Current assets	1,036,173	592,096
Current liabilities	792,402	421,667
Goodwill	28,033	28,033
Total assets	1,105,871	645,359
Intercompany Eliminations
Segment Reporting Information
Revenues	400	1,900
Other
Segment Reporting Information
Income before income taxes	(2,866)	(2,165)
Depreciation	3	3
Property, plant and equipment additions		80
Current assets	179,935	145,981
Current liabilities	2,287	1,283
Total assets	180,567	146,796
Power Services
Segment Reporting Information
Goodwill	18,500		$ 18,500
Power Services | Operating Segments
Segment Reporting Information
Revenues	226,667	160,356
Cost of revenues	173,086	127,386
Gross profit	53,581	32,970
Selling, general and administrative expenses	9,229	6,786
Income (loss) from operations	44,352	26,184
Other income (loss), net	7,852	4,372
Income before income taxes	52,204	30,556
Depreciation	328	160
Property, plant and equipment additions	1,805	215
Current assets	938,093	542,993
Current liabilities	709,549	398,610
Goodwill	18,476	18,476
Total assets	988,381	577,692
Industrial Construction Services | Operating Segments
Segment Reporting Information
Revenues	58,304	29,184
Cost of revenues	51,427	26,033
Gross profit	6,877	3,151
Selling, general and administrative expenses	1,963	1,612
Income (loss) from operations	4,914	1,539
Other income (loss), net	26
Income before income taxes	4,940	1,539
Amortization of intangibles	75	98
Depreciation	152	160
Property, plant and equipment additions	628	12
Current assets	92,323	43,147
Current liabilities	77,699	19,095
Goodwill	9,467	9,467
Total assets	108,690	58,995
Teledata Services | Operating Segments
Segment Reporting Information
Revenues	5,983	4,120
Cost of revenues	5,327	3,378
Gross profit	656	742
Selling, general and administrative expenses	1,162	918
Income (loss) from operations	(506)	(176)
Other income (loss), net	(3)	32
Income before income taxes	(509)	(144)
Depreciation	76	92
Property, plant and equipment additions		88
Current assets	5,757	5,956
Current liabilities	5,154	3,962
Goodwill	90	90
Total assets	$ 8,800	$ 8,672