XML 56 R45.htm IDEA: XBRL DOCUMENT v3.24.3
Investments - Gross Unrealized Losses and Fair Values of Investments in an Unrealized Loss Position (Details) - USD ($)
$ in Thousands
Sep. 30, 2024
Mar. 31, 2024
Fair Value    
Less than 12 months $ 52,431 $ 279,909
12 months or greater 0 267,581
Total 52,431 547,490
Gross Unrealized Losses    
Less than 12 months (42) (380)
12 months or greater 0 (3,318)
Total (42) (3,698)
Asset-backed securities    
Fair Value    
Less than 12 months   0
12 months or greater   121
Total   121
Gross Unrealized Losses    
Less than 12 months   0
12 months or greater   0
Total   0
Commercial paper    
Fair Value    
Less than 12 months 4,496 67,336
12 months or greater 0 0
Total 4,496 67,336
Gross Unrealized Losses    
Less than 12 months (1) (50)
12 months or greater 0 0
Total (1) (50)
Corporate notes and bonds    
Fair Value    
Less than 12 months 47,935 131,443
12 months or greater 0 0
Total 47,935 131,443
Gross Unrealized Losses    
Less than 12 months (41) (191)
12 months or greater 0 0
Total $ (41) (191)
Sovereign bonds    
Fair Value    
Less than 12 months   0
12 months or greater   7,676
Total   7,676
Gross Unrealized Losses    
Less than 12 months   0
12 months or greater   (73)
Total   (73)
U.S. government and agency securities    
Fair Value    
Less than 12 months   81,130
12 months or greater   259,784
Total   340,914
Gross Unrealized Losses    
Less than 12 months   (139)
12 months or greater   (3,245)
Total   $ (3,384)