Annual report pursuant to Section 13 and 15(d)

TRADING AND AVAILABLE-FOR-SALE SECURITIES AT FAIR VALUE - Schedule of maturity of trading and available-for-sale securities (Details)

v3.23.2
TRADING AND AVAILABLE-FOR-SALE SECURITIES AT FAIR VALUE - Schedule of maturity of trading and available-for-sale securities (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Mar. 31, 2022
Debt Securities, Available-for-Sale [Line Items]    
Total available-for-sale securities, at fair value $ 239,053 $ 161,364
Corporate debt    
Debt Securities, Available-for-Sale [Line Items]    
Total available-for-sale securities, at fair value 191,082 145,836
Non-US sovereign debt    
Debt Securities, Available-for-Sale [Line Items]    
Total available-for-sale securities, at fair value 40,162 12,997
US sovereign debt    
Debt Securities, Available-for-Sale [Line Items]    
Total available-for-sale securities, at fair value 7,809 2,530
Corporate equity    
Debt Securities, Available-for-Sale [Line Items]    
Total available-for-sale securities, at fair value 0 1
Up to 1 year    
Debt Securities, Available-for-Sale [Line Items]    
Total available-for-sale securities, at fair value 78,953 71,056
Up to 1 year | Corporate debt    
Debt Securities, Available-for-Sale [Line Items]    
Total available-for-sale securities, at fair value 77,006 69,364
Up to 1 year | Non-US sovereign debt    
Debt Securities, Available-for-Sale [Line Items]    
Total available-for-sale securities, at fair value 0 1,692
Up to 1 year | US sovereign debt    
Debt Securities, Available-for-Sale [Line Items]    
Total available-for-sale securities, at fair value 1,947 0
Up to 1 year | Corporate equity    
Debt Securities, Available-for-Sale [Line Items]    
Total available-for-sale securities, at fair value   0
1-5 years    
Debt Securities, Available-for-Sale [Line Items]    
Total available-for-sale securities, at fair value 118,527 51,019
1-5 years | Corporate debt    
Debt Securities, Available-for-Sale [Line Items]    
Total available-for-sale securities, at fair value 82,579 50,155
1-5 years | Non-US sovereign debt    
Debt Securities, Available-for-Sale [Line Items]    
Total available-for-sale securities, at fair value 33,143 864
1-5 years | US sovereign debt    
Debt Securities, Available-for-Sale [Line Items]    
Total available-for-sale securities, at fair value 2,805 0
1-5 years | Corporate equity    
Debt Securities, Available-for-Sale [Line Items]    
Total available-for-sale securities, at fair value   0
5-10 years    
Debt Securities, Available-for-Sale [Line Items]    
Total available-for-sale securities, at fair value 34,031 27,370
5-10 years | Corporate debt    
Debt Securities, Available-for-Sale [Line Items]    
Total available-for-sale securities, at fair value 31,486 26,284
5-10 years | Non-US sovereign debt    
Debt Securities, Available-for-Sale [Line Items]    
Total available-for-sale securities, at fair value 820 1,086
5-10 years | US sovereign debt    
Debt Securities, Available-for-Sale [Line Items]    
Total available-for-sale securities, at fair value 1,725 0
5-10 years | Corporate equity    
Debt Securities, Available-for-Sale [Line Items]    
Total available-for-sale securities, at fair value   0
More than 10 years    
Debt Securities, Available-for-Sale [Line Items]    
Total available-for-sale securities, at fair value 7,542 11,919
More than 10 years | Corporate debt    
Debt Securities, Available-for-Sale [Line Items]    
Total available-for-sale securities, at fair value 11 33
More than 10 years | Non-US sovereign debt    
Debt Securities, Available-for-Sale [Line Items]    
Total available-for-sale securities, at fair value 6,199 9,355
More than 10 years | US sovereign debt    
Debt Securities, Available-for-Sale [Line Items]    
Total available-for-sale securities, at fair value $ 1,332 2,530
More than 10 years | Corporate equity    
Debt Securities, Available-for-Sale [Line Items]    
Total available-for-sale securities, at fair value   $ 1