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Credit Agreement (Details) - USD ($)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Jul. 22, 2020
Debt Instrument [Line Items]        
Line of Credit Facility, Maximum Borrowing Capacity       $ 150,000,000
Maximum Increase of Availability of Credit       100,000,000
Debt Instrument, Basis Spread on Variable Rate 0.50%      
Line of Credit Facility, Commitment Fee Percentage 0.40%      
Line Cap Dollar Amount Before Base Trigger       22,500,000
Line Cap Percentage Before Base Trigger       0.15
Line Cap Dollar Amount After Base Trigger       15,000,000
Line Cap Percentage After Base Trigger       $ 0.10
Letters of Credit Outstanding, Amount $ 751,000      
Proceeds from Lines of Credit $ 0 $ 176,784,000 $ 0  
London Interbank Offered Rate (LIBOR) [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Basis Spread on Variable Rate 1.00%      
Minimum [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Fee 2.00      
Maximum [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Fee 2.50