UNAUDITED 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)	156
Share-based compensation	$ 0	1,735	0	0	0	1,735
Share-based compensation (in shares)	0
Repurchase of common stock	$ 0	0	$ (4,111)	0	0	(4,111)
Repurchase of common stock (in shares)			(90)
Net earnings	0	0	$ 0	23,518	0	23,518
Foreign currency translation adjustment	0	0	0	0	66	66
Balance at Jun. 30, 2021	$ 146	154,101	(79,483)	508,134	721	583,619
Balance (in shares) at Jun. 30, 2021	27,072
Balance at Mar. 31, 2022	$ 270	159,480	(6,734)	507,846	(124)	$ 660,738
Balance (in shares) at Mar. 31, 2022	26,886					26,886
Issuance of restricted stock awards	$ 1	0	0	0	0	$ 1
Issuance of restricted stock awards (in shares)	135
Share-based compensation	$ 0	1,773	0	0	0	1,773
Share-based compensation (in shares)	0
Repurchase of common stock	$ 0	0	$ (7,224)	0	0	(7,224)
Repurchase of common stock (in shares)			(128)
Net earnings	0	0	$ 0	22,339	0	22,339
Foreign currency translation adjustment	0	0	0	0	(1,339)	(1,339)
Balance at Jun. 30, 2022	$ 271	$ 161,253	$ (13,958)	$ 530,185	$ (1,463)	$ 676,288
Balance (in shares) at Jun. 30, 2022	26,893					26,893