CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net earnings	$ 1,056,400	$ 22,941	$ 1,074,008	$ 18,305
Other comprehensive income (loss):
Change in foreign currency translation adjustment	(2,301)	416	(2,876)	1,827
Comprehensive loss	$ 1,054,099	$ 23,357	$ 1,071,132	$ 20,132