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Earnings Per Share (Computation of basic and diluted earnings per share) (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2020	Dec. 31, 2019
Numerator for basic and diluted earnings per share:
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 6,594	$ (4,104)	$ (2,969)	$ 15,250	$ 16,599	$ 18,579	$ (479)	$ 50,428
Denominators:
Average basic shares outstanding	23,928			23,679			23,871	23,581
Effect of dilutive employee stock options and other share-based awards	273			352			0	344
Average diluted shares outstanding	24,201			24,031			23,871	23,925

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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