FAIR VALUE MEASUREMENTS (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Mar. 31, 2025
Assets:
Money-market funds	$ 1,017,866	$ 1,485,555
Derivative Contract asset, current	201	2,238
Derivative Contract asset, noncurrent	191
Non-qualified deferred compensation asset	22,153	16,967
Total assets measured at fair value	1,040,411	1,504,760
Liabilities:
Derivate Contracts liability, current	(11,368)	(64)
Non-qualified deferred compensation liability	(1,798)	(2,345)
Derivate Contracts liability, noncurrent	(117)
Non-qualified deferred compensation liability	(30,045)	(22,793)
Total liabilities measured at fair value	(43,328)	(25,202)
Designated as Hedging Instrument
Assets:
Derivative Contract asset, current	87	2,163
Derivative Contract asset, noncurrent	191
Liabilities:
Derivate Contracts liability, current	(11,368)	(64)
Derivate Contracts liability, noncurrent	(117)
Not Designated as Hedging Instrument
Assets:
Derivative Contract asset, current	114	75
Derivative Contract asset, noncurrent	0
Liabilities:
Derivate Contracts liability, current	0	0
Derivate Contracts liability, noncurrent	0
Level 1
Assets:
Money-market funds	1,017,866	1,485,555
Non-qualified deferred compensation asset	22,153	16,967
Total assets measured at fair value	1,040,019	1,502,522
Liabilities:
Non-qualified deferred compensation liability	(1,798)	(2,345)
Non-qualified deferred compensation liability	(30,045)	(22,793)
Total liabilities measured at fair value	(31,843)	(25,138)
Level 1 | Designated as Hedging Instrument
Assets:
Derivative Contract asset, current	0	0
Derivative Contract asset, noncurrent	0
Liabilities:
Derivate Contracts liability, current	0	0
Derivate Contracts liability, noncurrent	0
Level 1 | Not Designated as Hedging Instrument
Assets:
Derivative Contract asset, current	0	0
Level 2
Assets:
Money-market funds	0	0
Non-qualified deferred compensation asset	0	0
Total assets measured at fair value	392	2,238
Liabilities:
Non-qualified deferred compensation liability	0	0
Non-qualified deferred compensation liability	0	0
Total liabilities measured at fair value	(11,485)	(64)
Level 2 | Designated as Hedging Instrument
Assets:
Derivative Contract asset, current	87	2,163
Derivative Contract asset, noncurrent	191
Liabilities:
Derivate Contracts liability, current	(11,368)	(64)
Derivate Contracts liability, noncurrent	(117)
Level 2 | Not Designated as Hedging Instrument
Assets:
Derivative Contract asset, current	114	75
Level 3
Assets:
Money-market funds	0	0
Non-qualified deferred compensation asset	0	0
Total assets measured at fair value	0	0
Liabilities:
Non-qualified deferred compensation liability	0	0
Non-qualified deferred compensation liability	0	0
Total liabilities measured at fair value	0	0
Level 3 | Designated as Hedging Instrument
Assets:
Derivative Contract asset, current	0	0
Derivative Contract asset, noncurrent	0
Liabilities:
Derivate Contracts liability, current	0	0
Derivate Contracts liability, noncurrent	0
Level 3 | Not Designated as Hedging Instrument
Assets:
Derivative Contract asset, current	$ 0	$ 0