Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net loss	$ (17,420)	$ (29,343)
Other comprehensive income (loss):
Cumulative translation adjustments	953	(561)
Changes in market value of investments:
Changes in unrealized (losses) gains, net of (benefit) taxes of ($23) and $6, respectively	(74)	35
Total net change in market value of investments	(74)	35
Changes in market value of derivatives:
Changes in market value of derivatives, net of taxes (benefit) of $3 and ($19), respectively	8	(54)
Reclassification adjustment for net gains included in net loss, net of taxes of $10 and $11, respectively	32	35
Total net change in market value of derivatives	40	(19)
Other comprehensive income (loss)	919	(545)
Total comprehensive loss	$ (16,501)	$ (29,888)