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Senior Debt - Additional Information (Detail) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2023
Mar. 31, 2023
Dec. 31, 2022
Mar. 07, 2022
Line Of Credit Facility [Line Items]        
Credit facility principal payments 2023 $ 2.5      
Credit facility principal payments 2024 4.9      
Credit facility principal payments 2025 5.2      
Credit facility principal payments 2026 126.3      
Credit facility principal payments 2027 $ 3.9      
Weighted average interest rate on outstanding borrowings 8.06%   6.75%  
Maximum consolidated leverage ratio 3.75%   3.50%  
EFM JV [Member]        
Line Of Credit Facility [Line Items]        
Weighted average interest rate on outstanding borrowings 8.40%   6.60%  
Credit Agreement [Member]        
Line Of Credit Facility [Line Items]        
Unused credit availability under credit facility $ 26.4   $ 59.8  
Credit Agreement [Member] | EFM JV [Member]        
Line Of Credit Facility [Line Items]        
Secured Debt       $ 11.0
Federal Funds Rate [Member]        
Line Of Credit Facility [Line Items]        
Debt Instrument, Basis Spread on Variable Rate 0.50%      
Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]        
Line Of Credit Facility [Line Items]        
Debt Instrument, Basis Spread on Variable Rate 0.11448%      
Minimum [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]        
Line Of Credit Facility [Line Items]        
Maximum consolidated leverage ratio 1.75%      
Minimum [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Credit Agreement [Member]        
Line Of Credit Facility [Line Items]        
Debt Instrument, Basis Spread on Variable Rate 0.11%      
Minimum [Member] | Base Rate [Member]        
Line Of Credit Facility [Line Items]        
Debt Instrument, Basis Spread on Variable Rate 1.75%      
Maximum [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]        
Line Of Credit Facility [Line Items]        
Maximum consolidated leverage ratio 2.75%      
Maximum [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Credit Agreement [Member]        
Line Of Credit Facility [Line Items]        
Debt Instrument, Basis Spread on Variable Rate 0.43%      
Maximum [Member] | Base Rate [Member]        
Line Of Credit Facility [Line Items]        
Debt Instrument, Basis Spread on Variable Rate 2.75%      
Letters of Credit [Member]        
Line Of Credit Facility [Line Items]        
Aggregate principal amount outstanding under the credit facilities $ 20.4   18.9  
Letters of Credit [Member] | EFM JV [Member]        
Line Of Credit Facility [Line Items]        
Aggregate principal amount outstanding under the credit facilities 9.4   10.0  
Bank Guarantees [Member]        
Line Of Credit Facility [Line Items]        
Bank guarantee issuance under bilateral lines and collateral   $ 80.0    
Bank guarantee agreement outstanding amount 38.5   30.4  
Bank Guarantees [Member] | Euro Denominated Bank Guarantee [Member]        
Line Of Credit Facility [Line Items]        
Bank guarantee agreement outstanding amount $ 2.5   $ 0.6