Intangible Assets and Software Development Costs Capitalized Software Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Amortization of developed technology			$ 9,357	$ 7,371
Capitalized Software Development Costs		$ 1,600	2,000	6,500
Developed Technology Internal [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of developed technology	$ 3,400	$ 2,600	$ 9,400	$ 7,400