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, 2022	$ 270	$ 159,480	$ (6,734)	$ 507,846	$ (124)	$ 660,738
Balance (in shares) at Mar. 31, 2022	26,886
Increase (Decrease) in Stockholders' Equity [Roll Forward]
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
Balance at Mar. 31, 2022	$ 270	159,480	(6,734)	507,846	(124)	660,738
Balance (in shares) at Mar. 31, 2022	26,886
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings						50,808
Balance at Sep. 30, 2022	$ 272	163,211	(13,958)	558,654	(2,534)	705,645
Balance (in shares) at Sep. 30, 2022	26,906
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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of restricted stock awards	$ 1	0	0	0	0	1
Issuance of restricted stock awards (in shares)	13
Share-based compensation	$ 0	1,958	0	0	0	1,958
Share-based compensation (in shares)	0
Net earnings	$ 0	0	0	28,469	0	28,469
Foreign currency translation adjustment	0	0	0	0	(1,071)	(1,071)
Balance at Sep. 30, 2022	$ 272	163,211	(13,958)	558,654	(2,534)	705,645
Balance (in shares) at Sep. 30, 2022	26,906
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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of restricted stock awards	$ 2	(2)	0	0	0	$ 0
Issuance of restricted stock awards (in shares)	153
Issuance of common stock	$ 0	1,398	0	0	0	1,398
Issuance of common stock (in shares)	36
Share-based compensation	$ 0	2,205	0	0	0	2,205
Share-based compensation (in shares)	0
Repurchase of common stock	$ 0	0	$ (7,371)	0	0	(7,371)
Repurchase of common stock (in shares)			(147)
Net earnings	0	0	$ 0	33,847	0	33,847
Foreign currency translation adjustment	0	0	0	0	947	947
Balance at Jun. 30, 2023	$ 274	170,904	(21,451)	661,049	2,515	813,291
Balance (in shares) at Jun. 30, 2023	26,947
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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings						$ 66,511
Balance at Sep. 30, 2023	$ 274	173,318	(22,375)	693,713	766	$ 845,696
Balance (in shares) at Sep. 30, 2023	26,942					26,942
Balance at Jun. 30, 2023	$ 274	170,904	(21,451)	661,049	2,515	$ 813,291
Balance (in shares) at Jun. 30, 2023	26,947
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of restricted stock awards	$ 0	0	0	0	0	0
Issuance of restricted stock awards (in shares)	10
Share-based compensation	$ 0	2,414	0	0	0	2,414
Share-based compensation (in shares)	0
Repurchase of common stock	$ 0	0	$ (924)	0	0	(924)
Repurchase of common stock (in shares)			(15)
Net earnings	0	0	$ 0	32,664	0	32,664
Foreign currency translation adjustment	0	0	0	0	(1,749)	(1,749)
Balance at Sep. 30, 2023	$ 274	$ 173,318	$ (22,375)	$ 693,713	$ 766	$ 845,696
Balance (in shares) at Sep. 30, 2023	26,942					26,942