Common Shares (Details) - USD ($)
$ / shares in Units, $ in Thousands |
12 Months Ended |
|
|
Mar. 31, 2020 |
Mar. 31, 2019 |
Mar. 31, 2018 |
May 03, 2019 |
Mar. 31, 2017 |
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |
|
|
|
|
|
| Common Stock, Par or Stated Value Per Share |
$ 0.001
|
$ 75.00
|
|
$ 75.00
|
|
| Ordinary shares, with $75 par value; 84,517 and 84,747 ordinary shares issued and outstanding, respectively |
$ 1,982,164
|
$ 1,998,564
|
|
|
|
| Preferred Stock, Par or Stated Value Per Share |
$ 0.001
|
$ 0.001
|
|
|
|
| Preferred shares |
$ 0
|
$ 0
|
$ 15
|
|
$ 15
|
| Value (EUROS) Ordinary Shares Deferred |
25,000
|
|
|
|
|
| Weighted Average Number of Shares Outstanding, Basic |
84,778,000
|
84,577,000
|
85,028,000
|
|
|
| Weighted Average Number Diluted Shares Outstanding Adjustment |
863,000
|
891,000
|
685,000
|
|
|
| Weighted Average Number of Shares Outstanding, Diluted |
85,641,000
|
85,468,000
|
85,713,000
|
|
|
| Stock Options [Member] |
|
|
|
|
|
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |
|
|
|
|
|
| Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount |
285,000
|
352,000
|
393,000
|
|
|