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, 2021	$ 145	152,366	(75,372)	484,616	655	562,410
Balance (in shares) at Mar. 31, 2021	27,006
Net earnings						81,355
Balance at Dec. 31, 2021	$ 270	157,721	(2,592)	483,601	296	639,296
Balance (in shares) at Dec. 31, 2021	26,966
Balance at Jun. 30, 2021	$ 146	154,101	(79,483)	508,134	721	583,619
Balance (in shares) at Jun. 30, 2021	27,072
Issuance of restricted stock awards	$ 0	0	0	0	0	0
Issuance of restricted stock awards (in shares)	12
Share-based compensation	$ 0	1,840	0	0	0	1,840
Share-based compensation (in shares)	0
Repurchase of common stock	$ 0	0	$ (2,763)	0	0	(2,763)
Repurchase of common stock (in shares)			(63)
Net earnings	0	0	$ 0	31,413	0	31,413
Foreign currency translation adjustment	0	0	0	0	(506)	(506)
Balance at Sep. 30, 2021	$ 146	155,941	(82,246)	539,547	215	613,603
Balance (in shares) at Sep. 30, 2021	27,021
Issuance of restricted stock awards	$ 0	0	0	0	0	0
Issuance of restricted stock awards (in shares)	(5)
Share-based compensation	$ 0	1,780	0	0	0	1,780
Share-based compensation (in shares)	0
Repurchase of common stock	$ 0	0	$ (2,592)	0	0	(2,592)
Repurchase of common stock (in shares)			(50)
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	26,424	0	26,424
Foreign currency translation adjustment	0	0	0	0	81	81
Balance at Dec. 31, 2021	$ 270	157,721	(2,592)	483,601	296	639,296
Balance (in shares) at Dec. 31, 2021	26,966
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
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
Net earnings						$ 86,502
Balance at Dec. 31, 2022	$ 272	165,161	(13,958)	594,348	597	$ 746,420
Balance (in shares) at Dec. 31, 2022	26,907					26,907
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
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
Issuance of restricted stock awards	$ 0	0	0	0	0	0
Issuance of restricted stock awards (in shares)	1
Share-based compensation	$ 0	1,950	0	0	0	1,950
Share-based compensation (in shares)	0
Net earnings	$ 0	0	0	35,694	0	35,694
Foreign currency translation adjustment	0	0	0	0	3,131	3,131
Balance at Dec. 31, 2022	$ 272	$ 165,161	$ (13,958)	$ 594,348	$ 597	$ 746,420
Balance (in shares) at Dec. 31, 2022	26,907					26,907