CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Statement [Abstract]
Net revenue	$ 841,142	$ 857,841	$ 1,672,452	$ 1,398,300
Cost of goods sold	432,505	468,248	909,194	709,717
Gross profit	408,637	389,593	763,258	688,583
Selling and marketing	113,691	149,566	198,470	241,387
General and administrative	91,433	76,659	193,606	151,492
Research and development	74,216	76,197	147,324	145,160
Depreciation and amortization	13,691	12,024	26,109	23,281
Business reorganization	239	327	239	713
Total operating expenses	293,270	314,773	565,748	562,033
Income from operations	115,367	74,820	197,510	126,550
Interest and other, net	2,706	8,054	10,924	18,479
Loss on long-term investments	655	0	655	0
Income before income taxes	117,418	82,874	207,779	145,029
Provision for income taxes	18,097	11,059	19,953	26,934
Net income	$ 99,321	$ 71,815	$ 187,826	$ 118,095
Earnings per share:
Basic earnings per share (in dollars per share)	$ 0.87	$ 0.63	$ 1.65	$ 1.05
Diluted earnings per share (in dollars per share)	$ 0.86	$ 0.63	$ 1.63	$ 1.04