Quarterly report pursuant to Section 13 or 15(d)

Senior Credit Facility (Details)

v3.20.1
Senior Credit Facility (Details)
$ in Thousands
 3 Months Ended
Apr. 16, 2020
USD ($)
Mar. 31, 2020
USD ($)
Mar. 31, 2019
USD ($)
Sep. 29, 2017
USD ($)
Debt Instrument [Line Items]        
Line of Credit Facility Term, In Years 5      
Base reference rate of credit facilities LIBOR      
Interest rate spread above LIBOR as of reporting period (in hundredths) 0.50%      
Debt Instrument, Basis Spread on Variable Rate, Minimum 0.25%      
Debt Instrument, Basis Spread on Variable Rate, Maximum 0.75%      
Proceeds from senior credit facility   $ 65,000 $ 0  
Letters of Credit Outstanding, Amount $ 146,000 $ 13,970    
Revolving Credit Facility [Member]        
Debt Instrument [Line Items]        
Line of Credit Facility Term, In Years       5
Line of Credit Facility, Current Borrowing Capacity $ 225,000     $ 150,000
Additional borrowing capacity of credit facility       100,000
Credit facility amount       $ 250,000
Base reference rate of credit facilities   LIBOR    
Interest rate spread above LIBOR as of reporting period (in hundredths)   1.00%    
Debt Instrument, Basis Spread on Variable Rate, Minimum       0.30%
Debt Instrument, Basis Spread on Variable Rate, Maximum       0.80%
Proceeds from senior credit facility   $ 132,500    
Available borrowing capacity   $ 3,530    
Line of Credit Facility, Interest Rate at Period End   2.30%    
Letter of Credit [Member]        
Debt Instrument [Line Items]        
Line of Credit Facility, Capacity Available for Specific Purpose Other than for Trade Purchases       $ 30,000
Letters of Credit Outstanding, Amount   $ 13,970    
Swing line loan [Member]        
Debt Instrument [Line Items]        
Line of Credit Facility, Capacity Available for Specific Purpose Other than for Trade Purchases       $ 30,000
Federal funds [Member]        
Debt Instrument [Line Items]        
Interest rate spread above LIBOR as of reporting period (in hundredths)   0.50%