Reportable Operating Segments - Reconciliation (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2016	Mar. 31, 2016
Reconciliations of total assets from reportable segments to the condensed consolidated balance sheets
Cash and cash equivalents	$ 279,940	$ 291,764	$ 202,309	$ 245,956
Deferred tax assets	50,698	44,708
Total assets	1,272,858	1,191,780
Reportable segments
Reconciliations of total assets from reportable segments to the condensed consolidated balance sheets
Total assets	695,034	606,058
Unallocated to Segments
Reconciliations of total assets from reportable segments to the condensed consolidated balance sheets
Other unallocated corporate assets	$ 247,186	$ 249,250