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Credit Facilities (Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Debt Instrument [Line Items]    
Term loan $ 150,000  
Five-year revolving credit facility $ 430,000  
Revolving credit facility, term 5 years  
Repayments of Lines of Credit $ 150,000  
Amounts outstanding under line of credit facility 100,000  
Additional borrowings under present credit agreement 200,000  
Outstanding uncommitted lines of credit $ 182,639 $ 101,294
Weighted average interest rates on short-term borrowings outstanding 2.70% 4.20%
Prime Rate Or One Month Libor [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Basis Spread on Variable Rate 1.00%  
Federal funds rate [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Basis Spread on Variable Rate 0.50%  
Uncommitted lines of credit [Member]    
Debt Instrument [Line Items]    
Outstanding uncommitted lines of credit $ 83,000 $ 101,000
Unused lines of Credit [Member]    
Debt Instrument [Line Items]    
Outstanding uncommitted lines of credit 200,000  
Five-year term [Member]    
Debt Instrument [Line Items]    
Term loan $ 150,000  
Number of Years of Bank Credit Agreement 5 years  
Seven-year term [Member]    
Debt Instrument [Line Items]    
Term loan $ 220,000  
Number of Years of Bank Credit Agreement 7 years