Description of Business (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Revenue from External Customer [Line Items]
Operating Income (Loss)	$ 10,447	$ 20,886	$ 28,056	$ 73,160
Revenue from Contract with Customer Benchmark [Member] \| UNITED STATES
Revenue from External Customer [Line Items]
Sales revenue goods net percentage	53.00%		53.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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