Segment Information - Net Sales and Long-Lived Assets by Geographic Region (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Mar. 31, 2017
Net sales to unaffiliated customers and long-lived assets by geographic region
Net sales	$ 812,021	$ 666,707	$ 1,974,437	$ 1,710,875
Property, plant and equipment, net	86,901		86,901		$ 85,408
Americas | Operating Segments
Net sales to unaffiliated customers and long-lived assets by geographic region
Net sales	380,130	290,724	887,523	753,179
Property, plant and equipment, net	36,688		36,688		37,242
EMEA | Operating Segments
Net sales to unaffiliated customers and long-lived assets by geographic region
Net sales	253,767	233,251	622,681	576,809
Property, plant and equipment, net	4,604		4,604		4,006
Asia Pacific | Operating Segments
Net sales to unaffiliated customers and long-lived assets by geographic region
Net sales	178,124	$ 142,732	464,233	$ 380,887
Property, plant and equipment, net	$ 45,609		$ 45,609		$ 44,160