Reportable Operating Segments - Reconciliation (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Reconciliations of total assets from reportable segments to the condensed consolidated balance sheets
Cash and cash equivalents	$ 291,764	$ 245,956	$ 225,143	$ 245,088
Deferred tax assets	44,708	20,636
Total assets	1,191,780	1,278,068
Reportable segments
Reconciliations of total assets from reportable segments to the condensed consolidated balance sheets
Total assets	606,058	762,783
Unallocated to Segments
Reconciliations of total assets from reportable segments to the condensed consolidated balance sheets
Other unallocated corporate assets	$ 249,250	$ 248,693