Transition report pursuant to Rule 13a-10 or 15d-10

DEFINED CONTRIBUTION AND PENSION PLANS - Allocation of Plan Assets (Details)

v3.22.4
DEFINED CONTRIBUTION AND PENSION PLANS - Allocation of Plan Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Mar. 31, 2022
Mar. 31, 2021
Mar. 31, 2020
Defined Benefit Plan, Plan Assets, Category [Line Items]        
Total fair value investments $ 347,520 $ 511,786 $ 534,768 $ 477,137
Fair Value, Inputs, Level 1, 2 and 3        
Defined Benefit Plan, Plan Assets, Category [Line Items]        
Total fair value investments 304,937 459,523    
Fair Value, Inputs, Level 1, 2 and 3 | Cash and cash equivalents        
Defined Benefit Plan, Plan Assets, Category [Line Items]        
Total fair value investments 13,352 22,252    
Fair Value, Inputs, Level 1, 2 and 3 | Equity investments - U.K.        
Defined Benefit Plan, Plan Assets, Category [Line Items]        
Total fair value investments 962 1,053    
Fair Value, Inputs, Level 1, 2 and 3 | Equity investments - non-U.K.        
Defined Benefit Plan, Plan Assets, Category [Line Items]        
Total fair value investments 2,165 2,897    
Fair Value, Inputs, Level 1, 2 and 3 | Insurance linked securities        
Defined Benefit Plan, Plan Assets, Category [Line Items]        
Total fair value investments 25,141 27,386    
Fair Value, Inputs, Level 1, 2 and 3 | Liquid credit        
Defined Benefit Plan, Plan Assets, Category [Line Items]        
Total fair value investments 7,819 98,130    
Fair Value, Inputs, Level 1, 2 and 3 | Alternative investments        
Defined Benefit Plan, Plan Assets, Category [Line Items]        
Total fair value investments 42,222 51,801    
Fair Value, Inputs, Level 1, 2 and 3 | Diversified growth (absolute return) funds        
Defined Benefit Plan, Plan Assets, Category [Line Items]        
Total fair value investments 722 790    
Fair Value, Inputs, Level 1, 2 and 3 | Government debt securities        
Defined Benefit Plan, Plan Assets, Category [Line Items]        
Total fair value investments 102,488 99,157    
Fair Value, Inputs, Level 1, 2 and 3 | Corporate debt securities        
Defined Benefit Plan, Plan Assets, Category [Line Items]        
Total fair value investments 1,203 1,712    
Fair Value, Inputs, Level 1, 2 and 3 | Insurance policy        
Defined Benefit Plan, Plan Assets, Category [Line Items]        
Total fair value investments 108,863 154,345    
Level 1        
Defined Benefit Plan, Plan Assets, Category [Line Items]        
Total fair value investments 9,262 10,043    
Level 1 | Cash and cash equivalents        
Defined Benefit Plan, Plan Assets, Category [Line Items]        
Total fair value investments 3,729 3,591    
Level 1 | Equity investments - U.K.        
Defined Benefit Plan, Plan Assets, Category [Line Items]        
Total fair value investments 962 1,053    
Level 1 | Equity investments - non-U.K.        
Defined Benefit Plan, Plan Assets, Category [Line Items]        
Total fair value investments 2,165 2,897    
Level 1 | Insurance linked securities        
Defined Benefit Plan, Plan Assets, Category [Line Items]        
Total fair value investments 0 0    
Level 1 | Liquid credit        
Defined Benefit Plan, Plan Assets, Category [Line Items]        
Total fair value investments 0 0    
Level 1 | Alternative investments        
Defined Benefit Plan, Plan Assets, Category [Line Items]        
Total fair value investments 0 0    
Level 1 | Diversified growth (absolute return) funds        
Defined Benefit Plan, Plan Assets, Category [Line Items]        
Total fair value investments 722 790    
Level 1 | Government debt securities        
Defined Benefit Plan, Plan Assets, Category [Line Items]        
Total fair value investments 481 0    
Level 1 | Corporate debt securities        
Defined Benefit Plan, Plan Assets, Category [Line Items]        
Total fair value investments 1,203 1,712    
Level 1 | Insurance policy        
Defined Benefit Plan, Plan Assets, Category [Line Items]        
Total fair value investments 0 0    
Level 2        
Defined Benefit Plan, Plan Assets, Category [Line Items]        
Total fair value investments 161,671 295,135    
Level 2 | Cash and cash equivalents        
Defined Benefit Plan, Plan Assets, Category [Line Items]        
Total fair value investments 9,623 18,661    
Level 2 | Equity investments - U.K.        
Defined Benefit Plan, Plan Assets, Category [Line Items]        
Total fair value investments 0 0    
Level 2 | Equity investments - non-U.K.        
Defined Benefit Plan, Plan Assets, Category [Line Items]        
Total fair value investments 0 0    
Level 2 | Insurance linked securities        
Defined Benefit Plan, Plan Assets, Category [Line Items]        
Total fair value investments 0 27,386    
Level 2 | Liquid credit        
Defined Benefit Plan, Plan Assets, Category [Line Items]        
Total fair value investments 7,819 98,130    
Level 2 | Alternative investments        
Defined Benefit Plan, Plan Assets, Category [Line Items]        
Total fair value investments 42,222 51,801    
Level 2 | Diversified growth (absolute return) funds        
Defined Benefit Plan, Plan Assets, Category [Line Items]        
Total fair value investments 0 0    
Level 2 | Government debt securities        
Defined Benefit Plan, Plan Assets, Category [Line Items]        
Total fair value investments 102,007 99,157    
Level 2 | Corporate debt securities        
Defined Benefit Plan, Plan Assets, Category [Line Items]        
Total fair value investments 0 0    
Level 2 | Insurance policy        
Defined Benefit Plan, Plan Assets, Category [Line Items]        
Total fair value investments 0 0    
Level 3        
Defined Benefit Plan, Plan Assets, Category [Line Items]        
Total fair value investments 134,004 154,345    
Level 3 | Cash and cash equivalents        
Defined Benefit Plan, Plan Assets, Category [Line Items]        
Total fair value investments 0 0    
Level 3 | Equity investments - U.K.        
Defined Benefit Plan, Plan Assets, Category [Line Items]        
Total fair value investments 0 0    
Level 3 | Equity investments - non-U.K.        
Defined Benefit Plan, Plan Assets, Category [Line Items]        
Total fair value investments 0 0    
Level 3 | Insurance linked securities        
Defined Benefit Plan, Plan Assets, Category [Line Items]        
Total fair value investments 25,141 0    
Level 3 | Liquid credit        
Defined Benefit Plan, Plan Assets, Category [Line Items]        
Total fair value investments 0 0    
Level 3 | Alternative investments        
Defined Benefit Plan, Plan Assets, Category [Line Items]        
Total fair value investments 0 0    
Level 3 | Diversified growth (absolute return) funds        
Defined Benefit Plan, Plan Assets, Category [Line Items]        
Total fair value investments 0 0    
Level 3 | Government debt securities        
Defined Benefit Plan, Plan Assets, Category [Line Items]        
Total fair value investments 0 0    
Level 3 | Corporate debt securities        
Defined Benefit Plan, Plan Assets, Category [Line Items]        
Total fair value investments 0 0    
Level 3 | Insurance policy        
Defined Benefit Plan, Plan Assets, Category [Line Items]        
Total fair value investments 108,863 154,345    
Net asset value        
Defined Benefit Plan, Plan Assets, Category [Line Items]        
Total fair value investments $ 42,583 $ 52,263