CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 30, 2026	Apr. 30, 2025
CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS
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 FROM OPERATIONS	45,395	24,342
Other income, 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
OTHER COMPREHENSIVE INCOME, NET OF TAXES
Foreign currency translation adjustments	(541)	3,621
Net unrealized (losses) gains on available-for-sale securities	(2,659)	2,680
COMPREHENSIVE INCOME	$ 42,863	$ 28,851
EARNINGS PER SHARE
Basic (in dollars per share)	$ 3.3	$ 1.65
Diluted (in dollars per share)	$ 3.24	$ 1.6
WEIGHTED AVERAGE SHARES OUTSTANDING
Basic (in shares)	13,959	13,628
Diluted (in shares)	14,197	14,112
CASH DIVIDENDS PER SHARE	$ 0.5	$ 0.375