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Common And Preferred Stock Common and Preferred Stock (Tables) | 12 Months Ended
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Mar. 31, 2017
Schedule of Repurchases of Shares [Abstract] |
Schedule Of Repurchases Of Shares [Table Text Block] | Share repurchases under the programs for the fiscal years ended March 31, 2017, 2016, and 2015 were as follows:
| Fiscal Year Ended March 31,
| 2017 |  | 2016 |  | 2015
Common Stock |  |  |  |  |
Number of shares repurchased | — |  |  | — |  |  | 719,993 |
Cost of shares repurchased (in thousands of dollars) | $ | — |  |  | $ | — |  |  | $ | 31,227 |
Weighted-average cost per share | $ | — |  |  | $ | — |  |  | $ | 43.37 |
Series B 6.75% Convertible Perpetual Preferred Stock |  |  |  |  |
Number of shares repurchased | — |  |  | — |  |  | 1,509 |
Cost of shares repurchased (in thousands of dollars) | $ | — |  |  | $ | — |  |  | $ | 1.497 |
Weighted-average cost per share | $ | — |  |  | $ | — |  |  | $ | 992.27 |

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