CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Income Statement [Abstract]
Revenues	$ 226,960	$ 212,514
Cost of revenue	117,271	113,960
Gross profit	109,689	98,554
Operating expenses:
Research and development	24,536	23,563
Sales and marketing	54,850	48,440
General and administrative	34,718	32,356
Gains, losses and other items, net	1,286
Gains, losses and other items, net		(98)
Total operating expenses	115,390	104,261
Loss from operations	(5,701)	(5,707)
Other income (expense):
Interest expense	(2,838)	(2,342)
Other, net	524	(672)
Total other expense	(2,314)	(3,014)
Loss before income taxes	(8,015)	(8,721)
Income taxes (benefit)	(5,000)	(7,421)
Net loss	$ (3,015)	$ (1,300)
Basic loss per share:
Basic earnings (loss) per share (in USD per share)	$ (0.04)	$ (0.02)
Diluted loss per share:
Diluted earnings (loss) per share (in USD per share)	$ (0.04)	$ (0.02)