Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 29,021	$ 36,725	$ 7,915	$ (10,090)
Other comprehensive income (loss):
Cumulative translation adjustments	1,482	297	3,375	(789)
Changes in market value of investments:
Changes in unrealized (losses) gains, net of (benefit) taxes of ($5), $1, ($38) and $12, respectively	(15)	3	(122)	40
Total net change in market value of investments	(15)	3	(122)	40
Changes in market value of derivatives:
Changes in market value of derivatives, net of taxes of $40, $40, $101 and $6, respectively	132	84	319	18
Reclassification adjustment for net (losses) gains included in net income (loss), net of (benefit) taxes of ($24), ($7), ($47) and $8, respectively	(79)	(30)	(150)	25
Total net change in market value of derivatives	53	54	169	43
Other comprehensive income (loss)	1,520	354	3,422	(706)
Total comprehensive income (loss)	$ 30,541	$ 37,079	$ 11,337	$ (10,796)