Earnings Per Share (Computation of basic and diluted earnings per share) (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Numerator for basic and diluted earnings per share:
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 15,203	$ (7,263)	$ (4,104)	$ (2,969)	$ 7,940	$ (7,073)
Denominators:
Average basic shares outstanding	28,418		23,883		27,594	23,843
Effect of dilutive employee stock options and other share-based awards	338		0		363	0
Average diluted shares outstanding	28,756		23,883		27,957	23,843