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Debt (Details)
 12 Months Ended
Dec. 31, 2020
USD ($)
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 $ 188,000
Maximum [Member]  
Debt Instrument [Line Items]  
Debt Instrument, Fee 2.50
Minimum [Member]  
Debt Instrument [Line Items]  
Debt Instrument, Fee 2.00