FAIR VALUE MEASUREMENTS - Assets Measured at Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Mar. 31, 2021
Assets measured at fair value on a recurring basis
Short-term investments	$ 820,060	$ 1,308,692
Contingent earn-out consideration	(66,025)
Contingent earn-out consideration	(43,030)
Total recurring fair value measurements, net	2,509,813	2,976,627
Quoted prices in active markets for identical assets (level 1)
Assets measured at fair value on a recurring basis
Contingent earn-out consideration	0
Contingent earn-out consideration	0
Total recurring fair value measurements, net	1,805,904	2,199,225
Significant other observable inputs (level 2)
Assets measured at fair value on a recurring basis
Contingent earn-out consideration	0
Contingent earn-out consideration	0
Total recurring fair value measurements, net	796,830	769,824
Significant unobservable inputs (level 3)
Assets measured at fair value on a recurring basis
Contingent earn-out consideration	(66,025)
Contingent earn-out consideration	(43,030)
Total recurring fair value measurements, net	(92,921)	7,578
Bank-time deposits
Assets measured at fair value on a recurring basis
Cash and cash equivalents	636,000	95,000
Restricted cash and cash equivalents	531	563
Short-term investments	131,797	578,762
Bank-time deposits | Quoted prices in active markets for identical assets (level 1)
Assets measured at fair value on a recurring basis
Cash and cash equivalents	636,000	95,000
Restricted cash and cash equivalents	531	563
Short-term investments	131,797	578,762
Bank-time deposits | Significant other observable inputs (level 2)
Assets measured at fair value on a recurring basis
Cash and cash equivalents	0	0
Restricted cash and cash equivalents	0	0
Short-term investments	0	0
Bank-time deposits | Significant unobservable inputs (level 3)
Assets measured at fair value on a recurring basis
Cash and cash equivalents	0	0
Restricted cash and cash equivalents	0	0
Short-term investments	0	0
Money market funds
Assets measured at fair value on a recurring basis
Cash and cash equivalents	501,903	837,614
Restricted cash and cash equivalents	356,830	528,659
Long-term restricted cash and cash equivalents	103,452	98,541
Money market funds | Quoted prices in active markets for identical assets (level 1)
Assets measured at fair value on a recurring basis
Cash and cash equivalents	501,903	837,614
Restricted cash and cash equivalents	356,830	528,659
Long-term restricted cash and cash equivalents	103,452	98,541
Money market funds | Significant other observable inputs (level 2)
Assets measured at fair value on a recurring basis
Cash and cash equivalents	0	0
Restricted cash and cash equivalents	0	0
Long-term restricted cash and cash equivalents	0	0
Money market funds | Significant unobservable inputs (level 3)
Assets measured at fair value on a recurring basis
Cash and cash equivalents	0	0
Restricted cash and cash equivalents	0	0
Long-term restricted cash and cash equivalents	0	0
Commercial paper
Assets measured at fair value on a recurring basis
Cash and cash equivalents	119,377	100,105
Short-term investments	125,390	148,150
Commercial paper | Quoted prices in active markets for identical assets (level 1)
Assets measured at fair value on a recurring basis
Cash and cash equivalents	0	0
Short-term investments	0	0
Commercial paper | Significant other observable inputs (level 2)
Assets measured at fair value on a recurring basis
Cash and cash equivalents	119,377	100,105
Short-term investments	125,390	148,150
Commercial paper | Significant unobservable inputs (level 3)
Assets measured at fair value on a recurring basis
Cash and cash equivalents	0	0
Short-term investments	0	0
US Treasuries
Assets measured at fair value on a recurring basis
Cash and cash equivalents	51,977
Short-term investments	23,414	60,086
US Treasuries | Quoted prices in active markets for identical assets (level 1)
Assets measured at fair value on a recurring basis
Cash and cash equivalents	51,977
Short-term investments	23,414	60,086
US Treasuries | Significant other observable inputs (level 2)
Assets measured at fair value on a recurring basis
Cash and cash equivalents	0
Short-term investments	0	0
US Treasuries | Significant unobservable inputs (level 3)
Assets measured at fair value on a recurring basis
Cash and cash equivalents	0
Short-term investments	0	0
Certificates of Deposit
Assets measured at fair value on a recurring basis
Cash and cash equivalents	10,005
Short-term investments	999
Certificates of Deposit | Quoted prices in active markets for identical assets (level 1)
Assets measured at fair value on a recurring basis
Cash and cash equivalents	0
Short-term investments	0
Certificates of Deposit | Significant other observable inputs (level 2)
Assets measured at fair value on a recurring basis
Cash and cash equivalents	10,005
Short-term investments	999
Certificates of Deposit | Significant unobservable inputs (level 3)
Assets measured at fair value on a recurring basis
Cash and cash equivalents	0
Short-term investments	0
Corporate Bonds
Assets measured at fair value on a recurring basis
Cash and cash equivalents	2,801
Short-term investments	538,460	521,224
Corporate Bonds | Quoted prices in active markets for identical assets (level 1)
Assets measured at fair value on a recurring basis
Cash and cash equivalents	0
Short-term investments	0	0
Corporate Bonds | Significant other observable inputs (level 2)
Assets measured at fair value on a recurring basis
Cash and cash equivalents	2,801
Short-term investments	538,460	521,224
Corporate Bonds | Significant unobservable inputs (level 3)
Assets measured at fair value on a recurring basis
Cash and cash equivalents	0
Short-term investments	0	0
Asset-backed securities
Assets measured at fair value on a recurring basis
Short-term investments		470
Asset-backed securities | Quoted prices in active markets for identical assets (level 1)
Assets measured at fair value on a recurring basis
Short-term investments		0
Asset-backed securities | Significant other observable inputs (level 2)
Assets measured at fair value on a recurring basis
Short-term investments		470
Asset-backed securities | Significant unobservable inputs (level 3)
Assets measured at fair value on a recurring basis
Short-term investments		0
Private equity
Assets measured at fair value on a recurring basis
Private equity	16,134	7,578
Private equity | Quoted prices in active markets for identical assets (level 1)
Assets measured at fair value on a recurring basis
Private equity	0	0
Private equity | Significant other observable inputs (level 2)
Assets measured at fair value on a recurring basis
Private equity	0	0
Private equity | Significant unobservable inputs (level 3)
Assets measured at fair value on a recurring basis
Private equity	16,134	7,578
Foreign currency forward contracts
Assets measured at fair value on a recurring basis
Foreign currency forward contracts	(202)	(125)
Foreign currency forward contracts | Quoted prices in active markets for identical assets (level 1)
Assets measured at fair value on a recurring basis
Foreign currency forward contracts	0	0
Foreign currency forward contracts | Significant other observable inputs (level 2)
Assets measured at fair value on a recurring basis
Foreign currency forward contracts	(202)	(125)
Foreign currency forward contracts | Significant unobservable inputs (level 3)
Assets measured at fair value on a recurring basis
Foreign currency forward contracts	$ 0	$ 0