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Borrowings - Unsecured Notes (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Jun. 27, 2023
Jan. 27, 2023
Jul. 14, 2022
Jun. 15, 2022
Jan. 29, 2021
Apr. 30, 2019
Jul. 05, 2018
Jan. 30, 2018
Jun. 30, 2017
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Debt Instrument [Line Items]                            
Face amount                   $ 300,000   $ 300,000    
Repayment of Unsecured Notes                       140,000 $ 55,000  
Amortization of financing costs                       5,002 5,082  
Unsecured Notes outstanding balance                   391,500   391,500   $ 531,500
Unsecured Notes                            
Debt Instrument [Line Items]                            
Interest expense                   4,644 $ 6,512 15,602 18,624  
Amortization of financing costs                   $ 143 $ 202 $ 524 $ 607  
Weighted average interest rate                   4.70% 4.80% 4.80% 4.70%  
Effective interest rate                   4.90% 5.00% 5.00% 4.90%  
Average debt outstanding                   $ 391,500 $ 539,870 $ 433,661 $ 525,456  
Unsecured Notes | Minimum                            
Debt Instrument [Line Items]                            
Face amount                   $ 150,000   $ 150,000    
2017A Unsecured Notes                            
Debt Instrument [Line Items]                            
Repayment of Unsecured Notes     $ 55,000                      
2017A Unsecured Notes | Unsecured Notes                            
Debt Instrument [Line Items]                            
Face amount                 $ 55,000          
Term of debt                 5 years          
Stated interest rate                 4.76%          
2018A Unsecured Notes                            
Debt Instrument [Line Items]                            
Repayment of Unsecured Notes   $ 90,000                        
2018A Unsecured Notes | Unsecured Notes                            
Debt Instrument [Line Items]                            
Face amount               $ 90,000            
Term of debt               5 years            
Stated interest rate               4.87%            
2018B Unsecured Notes                            
Debt Instrument [Line Items]                            
Repayment of Unsecured Notes $ 50,000                          
2018B Unsecured Notes | Unsecured Notes                            
Debt Instrument [Line Items]                            
Face amount             $ 50,000              
Term of debt             5 years              
Stated interest rate             5.36%              
2019A Unsecured Notes | Unsecured Notes                            
Debt Instrument [Line Items]                            
Face amount           $ 116,500                
Term of debt           5 years                
Stated interest rate           5.494%                
2021A Unsecured Notes | Unsecured Notes                            
Debt Instrument [Line Items]                            
Face amount         $ 200,000                  
Term of debt         5 years                  
Stated interest rate         3.875%                  
2022A Unsecured Notes | Unsecured Notes                            
Debt Instrument [Line Items]                            
Face amount       $ 75,000                    
Term of debt       5 years                    
Stated interest rate       5.90%