SHORT-TERM INVESTMENTS - Schedule of Short-Term Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Mar. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Cost or Amortized Cost	$ 1,480,559	$ 1,307,895
Gross Unrealized Gains	79	1,053
Gross Unrealized Losses	(1,625)	(256)
Fair Value	1,479,013	1,308,692
Bank-time deposits
Debt Securities, Available-for-sale [Line Items]
Cost or Amortized Cost	622,683	578,762
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	622,683	578,762
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Cost or Amortized Cost	708,246	520,486
Gross Unrealized Gains	77	994
Gross Unrealized Losses	(1,625)	(256)
Fair Value	706,698	521,224
US Treasuries
Debt Securities, Available-for-sale [Line Items]
Cost or Amortized Cost	35,709	60,029
Gross Unrealized Gains	2	57
Gross Unrealized Losses	0	0
Fair Value	35,711	60,086
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Cost or Amortized Cost		469
Gross Unrealized Gains		1
Gross Unrealized Losses		0
Fair Value		470
Commercial paper
Debt Securities, Available-for-sale [Line Items]
Cost or Amortized Cost	113,921	148,149
Gross Unrealized Gains	0	1
Gross Unrealized Losses	0	0
Fair Value	$ 113,921	$ 148,150