INVESTMENTS IN DEBT SECURITIES - Contractual Maturities of Short-Term and Long-Term Investments (Details) $ in Thousands	Mar. 31, 2022 USD ($)
Amortized Cost
Due in one year or less	$ 801,257
Due in one to five years	1,368,925
Amortized Cost	2,170,182
Fair Value
Due in one year or less	796,749
Due in one to five years	1,333,139
Fair Value	$ 2,129,888