Quarterly report pursuant to Section 13 or 15(d)

Debt - Narrative (Details)

v3.20.2
Debt - Narrative (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Debt Instrument [Line Items]          
Debt issuance costs $ 2,664,000   $ 2,664,000   $ 2,789,000
LIBOR          
Debt Instrument [Line Items]          
Base margin     3.00%    
Base Rate          
Debt Instrument [Line Items]          
Base margin     1.75%    
Amended and Restated          
Debt Instrument [Line Items]          
Debt issuance costs $ 636,000   $ 636,000    
Increase in maximum availability     $ 100,000,000    
Effective interest rate 4.82%   4.82%    
Interest expense, net $ 3,200,000 $ 3,600,000 $ 9,500,000 $ 9,900,000  
Amended and Restated | Swap          
Debt Instrument [Line Items]          
Derivative notional amount 145,000,000   145,000,000   125,000,000
Revolving Loans          
Debt Instrument [Line Items]          
Revolving loans maximum borrowing capacity 350,000,000   350,000,000    
Letters of credit outstanding $ 0   $ 0   $ 54,000
Minimum | Amended and Restated          
Debt Instrument [Line Items]          
Interest rate range 3.75%   3.75%    
Maximum | Amended and Restated          
Debt Instrument [Line Items]          
Interest rate range 6.31%   6.31%