Business Segments (Assets) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2015	Mar. 31, 2015
Reconciliations of total assets from reportable segments to the condensed consolidated balance sheets
Total assets for reportable segments	$ 1,357,745	$ 1,278,068
Unallocated cash and cash equivalents	202,309	245,956	$ 168,744	$ 225,143
Consolidated total assets	1,357,745	1,278,068
Reportable segments
Reconciliations of total assets from reportable segments to the condensed consolidated balance sheets
Total assets for reportable segments	862,167	762,783
Consolidated total assets	862,167	762,783
Unallocated to segments
Reconciliations of total assets from reportable segments to the condensed consolidated balance sheets
Unallocated cash and cash equivalents	202,309	245,956
Unallocated deferred tax assets	21,038	20,636
Other unallocated corporate assets	$ 272,231	$ 248,693