Intangible Assets and Software Development Costs Capitalized Software Costs (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Finite-Lived Intangible Assets [Line Items]
Amortization of developed technology	$ 3,175	$ 2,663
Capitalized Software Development Costs		2,000
Developed Technology Internal [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of developed technology	$ 3,200	$ 2,700