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Financial Instruments - Interest Rate Swaps - Additional Information (Details)
3 Months Ended
Dec. 31, 2021
USD ($)
swap
Mar. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Interest rate swaps      
Debt Securities, Available-for-sale [Line Items]      
Fair value hedging instruments $ 0   $ 0
Number of interest rate swaps outstanding | swap 4    
Interest rate swap, December 2026 expiration      
Debt Securities, Available-for-sale [Line Items]      
Interest rate swap, term of contract 5 years    
Notional amount $ 30,000,000    
Interest rate swap, fixed interest rate 1.249%    
Interest rate swap, February 2021 expiration      
Debt Securities, Available-for-sale [Line Items]      
Notional amount   $ 10,000,000  
Interest rate swap, fixed interest rate   1.12%  
Interest rate swap, May 2022 expiration      
Debt Securities, Available-for-sale [Line Items]      
Notional amount $ 20,000,000    
Interest rate swap, fixed interest rate 1.77%    
Interest rate swap, June 2023 expiration      
Debt Securities, Available-for-sale [Line Items]      
Notional amount $ 15,000,000    
Interest rate swap, fixed interest rate 2.64%    
Interest rate swap, April 2025 expiration      
Debt Securities, Available-for-sale [Line Items]      
Notional amount $ 50,000,000    
Interest rate swap, fixed interest rate 0.885%