Business Segments (Assets) (Details) - USD ($) $ in Thousands |
Sep. 30, 2016 |
Mar. 31, 2016 |
Sep. 30, 2015 |
Mar. 31, 2015 |
|---|---|---|---|---|
| Reconciliations of total assets from reportable segments to the condensed consolidated balance sheets | ||||
| Total assets for reportable segments | $ 1,572,601 | $ 1,278,068 | ||
| Unallocated cash and cash equivalents | 110,047 | 245,956 | $ 99,775 | $ 225,143 |
| Consolidated total assets | 1,572,601 | 1,278,068 | ||
| Reportable segments | ||||
| Reconciliations of total assets from reportable segments to the condensed consolidated balance sheets | ||||
| Total assets for reportable segments | 1,172,137 | 762,783 | ||
| Consolidated total assets | 1,172,137 | 762,783 | ||
| Unallocated to segments | ||||
| Reconciliations of total assets from reportable segments to the condensed consolidated balance sheets | ||||
| Unallocated cash and cash equivalents | 110,047 | 245,956 | ||
| Unallocated deferred tax assets | 21,574 | 20,636 | ||
| Other unallocated corporate assets | $ 268,843 | $ 248,693 |