XML 57 R46.htm IDEA: XBRL DOCUMENT v3.10.0.1
Stock Acquisition Rights, Stock Options and Warrants (Schedule of Additional Information Regarding Stock Options Outstanding) (Details) - Stock Option [Member]
6 Months Ended
Sep. 30, 2018
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number Outstanding (shares) | shares 2,002,287
Weighted Average Remaining Life in Years 6 years 2 months 9 days
Weighted Average Exercise Price $ 25.69
Options Exercisable (shares) | shares 1,547,784
Weighted Average Exercise Price of Shares Exercisable $ 25.34
$13.25 - $20.00 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Exercise Prices, Minimum 13.25
Exercise Prices, Maximum $ 20.00
Number Outstanding (shares) | shares 630,906
Weighted Average Remaining Life in Years 5 years 11 months 19 days
Weighted Average Exercise Price $ 19.83
Options Exercisable (shares) | shares 626,781
Weighted Average Exercise Price of Shares Exercisable $ 19.83
$20.01 - $46.23 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Exercise Prices, Minimum 20.01
Exercise Prices, Maximum $ 46.23
Number Outstanding (shares) | shares 1,341,131
Weighted Average Remaining Life in Years 6 years 3 months 11 days
Weighted Average Exercise Price $ 27.91
Options Exercisable (shares) | shares 898,316
Weighted Average Exercise Price of Shares Exercisable $ 28.58
$46.24 - $72.85 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Exercise Prices, Minimum 46.24
Exercise Prices, Maximum $ 72.85
Number Outstanding (shares) | shares 30,250
Weighted Average Remaining Life in Years 6 years 6 months 4 days
Weighted Average Exercise Price $ 49.13
Options Exercisable (shares) | shares 22,687
Weighted Average Exercise Price of Shares Exercisable $ 49.13