Income Taxes (Schedule of Effective Income Tax Rate Reconciliation) (Details)	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Income Taxes [Abstract]
Statutory U.S. federal tax rate	21.00%	21.00%	31.50%
State income taxes (net of federal benefit)	2.10%	3.50%	3.60%
Remeasurement of deferred tax assets and liabilities arising from the Tax Legislation			166.90%
Change in fair value of equity based awards	(1.20%)	1.00%
Look through accounting policy election	2.10%
Research and development credit	0.20%	1.60%	2.40%
Goodwill impairment charge	(10.80%)
Other	(0.30%)	(0.80%)	(0.50%)
Effective income tax rate	13.10%	26.30%	203.90%