XML 49 R38.htm IDEA: XBRL DOCUMENT v3.21.2
Long-term Debt (Narrative) (Details) - USD ($)
6 Months Ended
Jun. 30, 2021
Dec. 31, 2020
Revolving Credit Facility [Member]    
Debt Instrument [Line Items]    
Credit facility, amount outstanding $ 0  
Credit Agreement [Member]    
Debt Instrument [Line Items]    
Credit facility, maximum borrowing capacity $ 100,000,000.0  
Credit facility, expiration date Sep. 18, 2023  
Credit facility, available borrowing capacity $ 97,600,000  
Credit Agreement [Member] | London Interbank Offered Rate (LIBOR) [Member]    
Debt Instrument [Line Items]    
Credit facility effective interest rate 1.84%  
Credit Agreement [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]    
Debt Instrument [Line Items]    
Credit facility, spread on variable interest rate 1.50%  
Credit Agreement [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]    
Debt Instrument [Line Items]    
Credit facility, spread on variable interest rate 2.25%  
Credit Agreement [Member] | Base Rate [Member]    
Debt Instrument [Line Items]    
Credit facility effective interest rate 4.00%  
Credit Agreement [Member] | Base Rate [Member] | Minimum [Member]    
Debt Instrument [Line Items]    
Credit facility, spread on variable interest rate 0.50%  
Credit Agreement [Member] | Base Rate [Member] | Maximum [Member]    
Debt Instrument [Line Items]    
Credit facility, spread on variable interest rate 1.25%  
Credit Agreement [Member] | Base Rate - Federal Funds [Member]    
Debt Instrument [Line Items]    
Credit facility, spread on variable interest rate 0.50%  
Credit Agreement [Member] | Base Rate - Eurodollar [Member]    
Debt Instrument [Line Items]    
Credit facility, spread on variable interest rate 1.00%  
Credit Agreement [Member] | Letter of Credit [Member]    
Debt Instrument [Line Items]    
Credit facility, amount outstanding $ 2,400,000 $ 2,400,000