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Stock-Based Compensation (Schedule Of Assumptions Used In Monte-Carlo Simulation Model) (Details)
3 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Schedule Of Assumptions Used In Monte Carlo Simulation Model The assumptions used in the Monte-Carlo simulation model to value our market-based restricted stock units were as follows:
 Three Months Ended
June 30,
20212020
Risk-free interest rate
0.4%
0.2%
Expected volatility
24 - 76%
23 - 63%
Weighted-average volatility
40%
37%
Expected dividendsNoneNone
 
Market-Based Restricted Stock Units [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Risk-free interest rate, minimum 0.40% 0.20%
Risk-free interest rate, maximum 0.40% 0.20%
Expected volatility, minimum 24.00% 23.00%
Expected volatility, maximum 76.00% 63.00%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Weighted Average Volatility Rate 40.00% 37.00%
Expected dividends 0.00% 0.00%