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Line of Credit (Details)
 1 Months Ended 12 Months Ended
Apr. 23, 2021
USD ($)
fiscalQuarter
Feb. 22, 2022
USD ($)
Nov. 30, 2021
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Feb. 17, 2022
USD ($)
Line of Credit Facility [Line Items]              
Credit facility amount outstanding       $ 40,000,000 $ 0    
2021 Credit Facility              
Line of Credit Facility [Line Items]              
Debt interest rate accrual term, number of preceding fiscal quarters | fiscalQuarter 4            
Credit facility principal payment       0      
Letters of credit outstanding amount       5,808,000      
Line of Credit | 2021 Credit Facility              
Line of Credit Facility [Line Items]              
Debt instrument, term 5 years            
Credit facility maximum borrowing capacity $ 325,000,000            
Credit facility stated percentage 0.00%            
Credit facility accordion feature, increase limit $ 100,000,000            
Credit facility borrowings     $ 40,000,000        
Credit facility amount outstanding       40,000,000      
Credit facility commitment fees       $ 563,000 $ 609,000 $ 630,000  
Weighted average interest rate       1.40%      
Line of Credit | 2021 Credit Facility | Subsequent Event              
Line of Credit Facility [Line Items]              
Credit facility principal payment   $ 10,000,000          
Credit facility remaining borrowing capacity             $ 289,192,000
Line of Credit | London Interbank Offered Rate (LIBOR) | 2021 Credit Facility              
Line of Credit Facility [Line Items]              
Credit facility variable interest rate basis spread (as a percent) 1.00%            
Line of Credit | Federal Funds Rate | 2021 Credit Facility              
Line of Credit Facility [Line Items]              
Credit facility variable interest rate basis spread (as a percent) 0.50%            
Line of Credit | Minimum | 2021 Credit Facility              
Line of Credit Facility [Line Items]              
Credit facility commitment fee per annum on daily unused portion (as a percent) 0.15%            
Line of Credit | Minimum | Base Rate | 2021 Credit Facility              
Line of Credit Facility [Line Items]              
Credit facility variable interest rate basis spread (as a percent) 0.25%            
Line of Credit | Minimum | London Interbank Offered Rate (LIBOR) | 2021 Credit Facility              
Line of Credit Facility [Line Items]              
Credit facility variable interest rate basis spread (as a percent) 1.25%            
Line of Credit | Maximum | 2021 Credit Facility              
Line of Credit Facility [Line Items]              
Credit facility commitment fee per annum on daily unused portion (as a percent) 0.30%            
Line of Credit | Maximum | Base Rate | 2021 Credit Facility              
Line of Credit Facility [Line Items]              
Credit facility variable interest rate basis spread (as a percent) 1.00%            
Line of Credit | Maximum | London Interbank Offered Rate (LIBOR) | 2021 Credit Facility              
Line of Credit Facility [Line Items]              
Credit facility variable interest rate basis spread (as a percent) 2.00%            
Letter of Credit | 2021 Credit Facility              
Line of Credit Facility [Line Items]              
Credit facility maximum borrowing capacity $ 15,000,000            
Credit facility, commitment fee percentage 1.25%            
Credit facility, fronting fee percentage 0.20%            
Revolving Credit Facility              
Line of Credit Facility [Line Items]              
Credit facility maximum borrowing capacity       $ 300,000,000