Annual report pursuant to Section 13 and 15(d)

Debt - Line of Credit Narrative (Details)

v3.8.0.1
Debt - Line of Credit Narrative (Details)
1 Months Ended 9 Months Ended 12 Months Ended
Jun. 30, 2020
USD ($)
Jun. 30, 2018
USD ($)
Dec. 31, 2017
USD ($)
Jun. 30, 2017
USD ($)
Apr. 03, 2017
Feb. 29, 2016
USD ($)
Sep. 30, 2014
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Sep. 30, 2019
Dec. 05, 2017
USD ($)
Feb. 28, 2017
USD ($)
Line of Credit Facility [Line Items]                        
Consolidated net coverage ratio following permitted acquisition     3.50         3.50        
Interest coverage ratio     3.00         3.00        
Revolving Facility                        
Line of Credit Facility [Line Items]                        
Aggregate principal amount             $ 200,000,000          
Additional borrowing capacity             $ 150,000,000          
Consolidated net coverage ratio following permitted acquisition             3.25          
Letter of Credit                        
Line of Credit Facility [Line Items]                        
Sub limit for issuance of letters of credit             $ 10,000,000          
Swingline Loan                        
Line of Credit Facility [Line Items]                        
Sub limit for issuance of letters of credit             $ 20,000,000          
Revolving Facility | Revolving Facility                        
Line of Credit Facility [Line Items]                        
Funds drawn     $ 50,000,000         $ 50,000,000 $ 0      
Available credit     150,000,000         $ 150,000,000        
Weighted average interest rate on short term debt               3.14% 1.75%      
Unamortized discount     0         $ 0 $ 0      
Delayed Draw Term Loan                        
Line of Credit Facility [Line Items]                        
Additional borrowing capacity                       $ 200,000,000
Periodic payment       $ 800,000                
Gross debt issuance costs                       $ 1,300,000
Delayed Draw Term Loan | Revolving Facility                        
Line of Credit Facility [Line Items]                        
Aggregate principal amount           $ 125,000,000            
Gross debt issuance costs           $ 700,000            
Delayed Draw Term Loan | Term Loan                        
Line of Credit Facility [Line Items]                        
Periodic principal payment     1,300,000                  
Funds drawn     197,439,000         197,439,000     $ 200,000,000  
Unamortized discount     $ 821,000         $ 821,000        
Fourth Amendment                        
Line of Credit Facility [Line Items]                        
Consolidated net coverage ratio following permitted acquisition     3.75         3.75        
Acquisition completion period               1 year        
Fourth Amendment | Convertible Debt                        
Line of Credit Facility [Line Items]                        
Consolidated net leverage ratio, minimum principal amount     $ 150,000,000         $ 150,000,000        
Consolidated net leverage ratio, minimum principal amount for one time leverage extension     50,000,000         50,000,000        
Minimum | Fourth Amendment                        
Line of Credit Facility [Line Items]                        
Unsecured debt issuance threshold     $ 225,000,000         $ 225,000,000        
Base Rate | Delayed Draw Term Loan | Revolving Facility                        
Line of Credit Facility [Line Items]                        
Consolidated net coverage ratio following permitted acquisition     4         4        
Base Rate | Fourth Amendment | Revolving Facility                        
Line of Credit Facility [Line Items]                        
Consolidated net coverage ratio following permitted acquisition     5   4     5        
Base Rate | Minimum | Revolving Facility                        
Line of Credit Facility [Line Items]                        
Basis spread on variable rate         0.25% 0.25% 0.25%          
Base Rate | Maximum | Revolving Facility                        
Line of Credit Facility [Line Items]                        
Basis spread on variable rate         1.25% 1.00% 0.75%          
Federal Funds Effective Swap Rate | Revolving Facility                        
Line of Credit Facility [Line Items]                        
Basis spread on variable rate             0.50%          
LIBOR | Revolving Facility                        
Line of Credit Facility [Line Items]                        
Basis spread on variable rate             1.00%          
LIBOR | Minimum | Revolving Facility                        
Line of Credit Facility [Line Items]                        
Basis spread on variable rate         1.25% 1.25% 1.25%          
LIBOR | Maximum | Revolving Facility                        
Line of Credit Facility [Line Items]                        
Basis spread on variable rate         2.25% 2.00% 1.75%          
Scenario, Forecast | Delayed Draw Term Loan                        
Line of Credit Facility [Line Items]                        
Periodic payment $ 3,100,000 $ 1,500,000                    
Scenario, Forecast | Delayed Draw Term Loan | Term Loan                        
Line of Credit Facility [Line Items]                        
Periodic principal payment $ 5,000,000 $ 2,500,000                    
Scenario, Forecast | Base Rate | Fourth Amendment | Revolving Facility                        
Line of Credit Facility [Line Items]                        
Consolidated net coverage ratio following permitted acquisition                   4    
Other assets | Revolving Facility | Revolving Facility                        
Line of Credit Facility [Line Items]                        
Unamortized discount     $ 600,000         $ 600,000 $ 800,000