Earnings Per Share and Stock Plans (Schedule of Earnings Per Share) (Details) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Numerator for basic and diluted earnings per share:
Net income	$ 29,660	$ 9,106	$ 59,672
Denominators:
Average basic shares outstanding	28,040	23,897	23,619
Effect of dilutive employee stock options, RSU's and performance shares	361	276	236
Average diluted shares outstanding	28,401	24,173	23,855