Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt - Narrative (Details)

v3.10.0.1
Long-Term Debt - Narrative (Details)
1 Months Ended
Jun. 30, 2018
USD ($)
Feb. 28, 2018
USD ($)
May 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Debt Instrument [Line Items]        
Long-term debt $ 256,299,000     $ 202,168,000
Revolving Credit Facility        
Debt Instrument [Line Items]        
Long-term debt $ 136,000,000      
Total Funded Debt to EBITDA covenant ratio, maximum 3.00   2.75  
Term Loan | Revolving Credit Facility        
Debt Instrument [Line Items]        
Long-term debt $ 46,000,000      
Proceeds from issuance of debt 25,000,000      
Term Loan | 7.5% Term Loan        
Debt Instrument [Line Items]        
Proceeds from issuance of debt   $ 28,500,000    
Long-term debt $ 27,536,000      
Weighted average interest rate (as percent) 9.834%      
Term Loan | 7.5% Term Loan | London Interbank Offered Rate (LIBOR)        
Debt Instrument [Line Items]        
Basis spread on variable rate (as percent)   7.50%    
Term Loan | 5.15% Term Loan        
Debt Instrument [Line Items]        
Long-term debt $ 12,345,000     0
Weighted average interest rate (as percent) 5.15%      
Original principal amount $ 12,407,000      
Fixed interest rate (as percent) 515.00%      
Term Loan | Variable Rate Term Loan Due In June 2033        
Debt Instrument [Line Items]        
Long-term debt $ 9,970,000     $ 0
Weighted average interest rate (as percent) 4.38%      
Original principal amount $ 10,000,000      
Line of Credit | Revolving Credit Facility        
Debt Instrument [Line Items]        
Maximum borrowing capacity 85,000,000   $ 75,000,000  
Funds available for borrowing $ 67,276,000