CONSOLIDATED BALANCE SHEETS (Parentheticals) - USD ($) $ in Thousands	Jul. 31, 2023	Jan. 31, 2023	Jul. 31, 2022
CONSOLIDATED BALANCE SHEETS
Allowance for doubtful accounts	$ 18,491	$ 18,297	$ 18,067
Preferred stock, shares authorized	1,000,000	1,000,000	1,000,000
Preferred stock, shares issued	0	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01	$ 0.01
Common stock, shares authorized	120,000,000	120,000,000	120,000,000
Common stock, shares issued	49,396,000	49,396,000	49,396,000
Treasury stock, shares	3,675,000	2,680,000	1,909,000