Condensed Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common stock [Member]	Treasury stock [Member]	Capital in excess of Stated value [Member]	Retained earnings [Member]	Accumulated other comprehensive income (loss) [Member]
Beginning balance at Mar. 31, 2024	$ 236,477	$ 10,003	$ (1,791)	$ 94,680	$ 137,755	$ (4,170)
Beginning balance (in shares) at Mar. 31, 2024		33,342
Beginning balance (in shares) at Mar. 31, 2024			(5,965)
Share-based compensation	4,850			4,850
Other common stock issuances, net			$ 3	(3)
Other common stock issuances, net (in shares)			11
Shares issued upon exercise of SSARs			$ 150	(150)
Shares issued upon exercise of SSARs ( in shares)			498
Shares withheld for taxes upon exercise of SSARs or vesting of other grants	(1,104)		$ (4)	(1,100)
Shares withheld for taxes upon exercise of SSARs or vesting of other grants (in shares)			(14)
Net income	14,106				14,106
Unrealized translation adjustments	(158)					(158)
Ending balance at Jun. 30, 2024	254,171	$ 10,003	$ (1,642)	98,277	151,861	(4,328)
Ending balance (in shares) at Jun. 30, 2024		33,342
Ending balance (in shares) at Jun. 30, 2024			(5,470)
Beginning balance at Mar. 31, 2025	$ 265,886	$ 10,003	$ (1,600)	109,785	160,980	(13,282)
Beginning balance (in shares) at Mar. 31, 2025		33,342
Beginning balance (in shares) at Mar. 31, 2025	5,326,513		(5,327)
Share-based compensation	$ 5,376			5,376
Other common stock issuances, net			$ 1	(1)
Other common stock issuances, net (in shares)			3
Shares issued upon exercise of SSARs			$ 5	(5)
Shares issued upon exercise of SSARs ( in shares)			18
Shares withheld for taxes upon exercise of SSARs or vesting of other grants	(160)		$ (1)	(159)
Shares withheld for taxes upon exercise of SSARs or vesting of other grants (in shares)			(1)
Net income	4,890				4,890
Unrealized translation adjustments	7,227					7,227
Ending balance at Jun. 30, 2025	$ 283,219	$ 10,003	$ (1,595)	$ 114,996	$ 165,870	$ (6,055)
Ending balance (in shares) at Jun. 30, 2025		33,342
Ending balance (in shares) at Jun. 30, 2025	5,306,826		(5,307)