CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Additional Paid-In Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]	Total
Balance at Mar. 31, 2021	$ 145	$ 152,366	$ (75,372)	$ 484,616	$ 655	$ 562,410
Balance (in shares) at Mar. 31, 2021	27,006
Issuance of restricted stock awards	$ 1	0	0	0	0	1
Issuance of restricted stock awards (in shares)	163
Share-based compensation	$ 0	7,114	0	0	0	7,114
Share-based compensation (in shares)	0
Repurchase of common stock	$ 0	0	$ (13,608)	0	0	(13,608)
Repurchase of common stock (in shares)			(283)
Stock split effected in the form of a dividend	135	0	$ 0	(135)	0	0
Retirement of treasury stock	(11)	0	82,246	(82,235)	0	0
Net earnings	0	0	0	105,600	0	105,600
Foreign currency translation adjustment	0	0	0	0	(779)	(779)
Balance at Mar. 31, 2022	$ 270	159,480	(6,734)	507,846	(124)	660,738
Balance (in shares) at Mar. 31, 2022	26,886
Issuance of restricted stock awards	$ 2	0	0	0	0	2
Issuance of restricted stock awards (in shares)	150
Share-based compensation	$ 0	7,823	0	0	0	7,823
Share-based compensation (in shares)	0
Repurchase of common stock	$ 0	0	$ (7,346)	0	0	(7,346)
Repurchase of common stock (in shares)			(131)
Net earnings	0	0	$ 0	119,356	0	119,356
Foreign currency translation adjustment	0	0	0	0	1,692	1,692
Balance at Mar. 31, 2023	$ 272	167,303	(14,080)	627,202	1,568	$ 782,265
Balance (in shares) at Mar. 31, 2023	26,905					26,905
Issuance of restricted stock awards	$ 2	(2)	0	0	0	$ 0
Issuance of restricted stock awards (in shares)	162
Issuance of common stock	$ 0	3,019	0	0	0	3,019
Issuance of common stock (in shares)	71
Share-based compensation	$ 0	9,738	0	0	0	9,738
Share-based compensation (in shares)	0
Repurchase of common stock	$ 0	0	$ (9,731)	0	0	(9,731)
Repurchase of common stock (in shares)			(186)
Net earnings	0	0	$ 0	115,776	0	115,776
Foreign currency translation adjustment	0	0	0	0	712	712
Balance at Mar. 31, 2024	$ 274	$ 180,058	$ (23,811)	$ 742,978	$ 2,280	$ 901,779
Balance (in shares) at Mar. 31, 2024	26,952					26,952