Business Segments (Revenue by Geographic Area) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	$ 238,788	$ 241,552	$ 705,604	$ 711,775
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	197,296	203,920	599,931	604,263
Rest of world
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	$ 41,492	$ 37,632	$ 105,673	$ 107,512