Quarterly report pursuant to Section 13 or 15(d)

Debt (Details)

v3.20.1
Debt (Details) - USD ($)
1 Months Ended 3 Months Ended
Jan. 31, 2018
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Debt Instrument [Line Items]        
Long-term debt   $ 276,256,000   $ 272,800,000
Less debt issuance costs   (2,556,000)   (2,789,000)
Total long-term debt   273,700,000   270,011,000
Less current portion   (17,820,000)   (16,883,000)
Long-term debt, less current portion   255,880,000   253,128,000
Long-term Debt, Fiscal Year Maturity [Abstract]        
Total long-term debt   $ 273,700,000   270,011,000
LIBOR        
Debt Instrument [Line Items]        
Base margin   2.50%    
Base Rate        
Debt Instrument [Line Items]        
Base margin   1.25%    
Amended and Restated        
Debt Instrument [Line Items]        
Less debt issuance costs   $ (1,500,000)    
Amortization period of debt issuance costs 5 years      
Increase in maximum availability   $ 100,000,000    
Effective interest rate   4.06%    
Interest expense, net   $ 3,400,000 $ 2,900,000  
Amended and Restated | Swap        
Debt Instrument [Line Items]        
Derivative notional amount   145,000,000   125,000,000
Term Loan        
Debt Instrument [Line Items]        
Long-term debt   102,050,000   120,800,000
Total long-term debt   102,050,000    
Long-term Debt, Fiscal Year Maturity [Abstract]        
2020   14,062,000    
2021   21,563,000    
2022   22,500,000    
2023   43,925,000    
Total long-term debt   102,050,000    
Revolving Loans        
Debt Instrument [Line Items]        
Long-term debt   174,206,000   152,000,000
Revolving loans maximum borrowing capacity   350,000,000    
Letters of credit outstanding   $ 0   $ 54,000
Minimum | Amended and Restated        
Debt Instrument [Line Items]        
Interest rate range   3.11%    
Maximum | Amended and Restated        
Debt Instrument [Line Items]        
Interest rate range   5.31%