CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Income Statement [Abstract]
Net revenue	$ 860,889	$ 930,129	$ 2,533,341	$ 2,328,429
Cost of goods sold	346,244	437,093	1,255,438	1,146,810
Gross profit	514,645	493,036	1,277,903	1,181,619
Selling and marketing	139,906	137,068	338,376	378,455
General and administrative	98,624	84,531	292,230	236,023
Research and development	86,428	82,520	233,752	227,680
Depreciation and amortization	14,007	12,330	40,116	35,611
Business reorganization	(377)	(246)	(138)	467
Total operating expenses	338,588	316,203	904,336	878,236
Income from operations	176,057	176,833	373,567	303,383
Interest and other, net	1,098	11,943	12,022	30,422
Gain on long-term investments, net	39,291	0	38,636	0
Income before income taxes	216,446	188,776	424,225	333,805
Provision for income taxes	34,198	25,134	54,151	52,068
Net income	$ 182,248	$ 163,642	$ 370,074	$ 281,737
Earnings per share:
Basic earnings per share (in dollars per share)	$ 1.58	$ 1.44	$ 3.23	$ 2.49
Diluted earnings per share (in dollars per share)	$ 1.57	$ 1.43	$ 3.20	$ 2.47