Quarterly report pursuant to Section 13 or 15(d)

Debt (Details)

v3.19.3
Debt (Details) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended
Jan. 31, 2018
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Debt Instrument [Line Items]            
Long-term debt   $ 270,266,000   $ 270,266,000   $ 162,734,000
Less debt issuance costs   (1,735,000)   (1,735,000)   (2,135,000)
Total long-term debt   268,531,000   268,531,000   160,599,000
Less current portion   (10,716,000)   (10,716,000)   (9,466,000)
Long-term debt, less current portion   257,815,000   257,815,000   151,133,000
Long-term Debt, Fiscal Year Maturity [Abstract]            
Total long-term debt   268,531,000   $ 268,531,000   160,599,000
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)   $ (1,500,000)    
Amortization period of debt issuance costs 5 years          
Increase in maximum availability       $ 100,000,000    
Duration of interest rate cash flow hedge       3 years    
Effective interest rate   4.91%   4.91%    
Interest expense, net   $ 3,600,000 $ 1,900,000 $ 9,900,000 $ 5,100,000  
Amended and Restated | Swap            
Debt Instrument [Line Items]            
Derivative notional amount   125,000,000   125,000,000   50,000,000
Term Loan            
Debt Instrument [Line Items]            
Long-term debt   73,300,000   73,300,000   80,800,000
Total long-term debt   73,300,000   73,300,000    
Long-term Debt, Fiscal Year Maturity [Abstract]            
2019   2,500,000   2,500,000    
2020   11,875,000   11,875,000    
2021   14,375,000   14,375,000    
2022   15,000,000   15,000,000    
2023   29,550,000   29,550,000    
Total long-term debt   73,300,000   73,300,000    
Revolving Loans            
Debt Instrument [Line Items]            
Long-term debt   196,966,000   196,966,000   81,934,000
Revolving loans maximum borrowing capacity   300,000,000   300,000,000    
Letters of credit outstanding   $ 72,000   $ 72,000   $ 57,000
Minimum | Amended and Restated            
Debt Instrument [Line Items]            
Interest rate range   4.53%   4.53%    
Maximum | Amended and Restated            
Debt Instrument [Line Items]            
Interest rate range   6.25%   6.25%