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Debt (Textual) (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2022
May 06, 2021
USD ($)
Feb. 04, 2021
USD ($)
Debt Instrument [Line Items]            
Total short-term debt $ 501,792 $ 403,703        
Debt Instrument, Coverage Ratio 1.4          
Maximum amount borrowed $ 1,195,800          
Interest paid 38,200 $ 33,900 $ 43,400      
Unused capacity $ 890,100          
Short-term Debt, Weighted Average Interest Rate, at Point in Time 1.49% 1.66%        
Notes Payable            
Debt Instrument [Line Items]            
Face amount         $ 358,000 $ 250,000
Total short-term debt $ 200,000          
Estimated fair value            
Debt Instrument [Line Items]            
Fair value of long-term debt 650,700 $ 989,100        
Subsequent Event | Forecast            
Debt Instrument [Line Items]            
Debt Instrument, Coverage Ratio       1.0    
Recourse            
Debt Instrument [Line Items]            
Total short-term debt 436,307 310,511        
Aggregate annual maturities of long term debt, 2019 24,700          
Aggregate annual maturities of long term debt, 2020 48,800          
Aggregate annual maturities of long term debt, 2021 25,100          
Aggregate annual maturities of long term debt, 2022 25,300          
Aggregate annual maturities of long term debt, 2023 305,500          
Aggregate annual maturities of long term debt thereafter 134,800          
Non-recourse            
Debt Instrument [Line Items]            
Total short-term debt 65,485 $ 93,192        
Aggregate annual maturities of long term debt, 2019 7,600          
Aggregate annual maturities of long term debt, 2020 8,000          
Aggregate annual maturities of long term debt, 2021 7,900          
Aggregate annual maturities of long term debt, 2022 7,200          
Aggregate annual maturities of long term debt, 2023 7,100          
Aggregate annual maturities of long term debt thereafter $ 34,900