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Debt - Narrative (Details) - USD ($)
3 Months Ended
Dec. 31, 2020
Jul. 15, 2020
Sep. 23, 2016
Feb. 28, 2021
May 31, 2020
Dec. 02, 2019
Oct. 25, 2019
Jun. 25, 2018
Nov. 01, 2016
Debt Instrument [Line Items]                  
Term loan facility       $ 145,051,000 $ 112,917,000        
Debt issuance costs       4,949,000 $ 1,083,000        
BMO | Interest Rate Swap                  
Debt Instrument [Line Items]                  
Interest rate swap contract notional amount           $ 110,000,000.0   $ 30,000,000.0 $ 50,000,000.0
LIBOR | BMO | Interest Rate Swap                  
Debt Instrument [Line Items]                  
Interest rate           1.526%   2.74% 1.22%
Credit Agreement With JPMorgan Chase, BMO Harris Bank, and City National Bank | Term loan                  
Debt Instrument [Line Items]                  
Term loan facility     $ 50,000,000.0            
Term loan, interest rate     9.50%            
Sixth Amendment | Term loan                  
Debt Instrument [Line Items]                  
Term loan facility             $ 120,000,000.0    
Periodic payment     $ 3,000,000.0            
Eighth Amendment                  
Debt Instrument [Line Items]                  
Debt agreement, percentage of EBITDA   20.00%              
Eighth Amendment | Minimum                  
Debt Instrument [Line Items]                  
Commitment fee percentage   0.15%              
Eighth Amendment | Minimum | Prime Rate                  
Debt Instrument [Line Items]                  
Basis spread on variable rate   0.75%              
Eighth Amendment | Minimum | Eurodollar                  
Debt Instrument [Line Items]                  
Basis spread on variable rate   1.75%              
Eighth Amendment | Maximum                  
Debt Instrument [Line Items]                  
Commitment fee percentage   0.55%              
Eighth Amendment | Maximum | Prime Rate                  
Debt Instrument [Line Items]                  
Basis spread on variable rate   3.50%              
Eighth Amendment | Maximum | Eurodollar                  
Debt Instrument [Line Items]                  
Basis spread on variable rate   4.50%              
Credit Agreement With BMO Harris Bank, Goldman Sachs Specialty Lending Group, L.P., and Guggenheim Credit Services, LLC                  
Debt Instrument [Line Items]                  
Debt issuance costs $ 9,300,000                
Credit Agreement With BMO Harris Bank, Goldman Sachs Specialty Lending Group, L.P., and Guggenheim Credit Services, LLC | Term loan                  
Debt Instrument [Line Items]                  
Debt instrument, face amount $ 170,000,000.0                
Line of credit, quarterly principal payments 5.00%                
Credit Agreement With BMO Harris Bank, Goldman Sachs Specialty Lending Group, L.P., and Guggenheim Credit Services, LLC | Term loan | LIBOR                  
Debt Instrument [Line Items]                  
Basis spread on variable rate 8.50%                
Credit Agreement With BMO Harris Bank, Goldman Sachs Specialty Lending Group, L.P., and Guggenheim Credit Services, LLC | Term loan | Base Rate                  
Debt Instrument [Line Items]                  
Basis spread on variable rate 7.50%                
Revolving credit facility | Credit Agreement With JPMorgan Chase, BMO Harris Bank, and City National Bank                  
Debt Instrument [Line Items]                  
Revolving line of credit     $ 100,000,000.0            
Revolving credit facility | Sixth Amendment | Eurodollar                  
Debt Instrument [Line Items]                  
Line of credit outstanding       $ 41,000,000.0          
Line of credit facility, interest rate       2.75%          
Revolving credit facility | Credit Agreement With BMO Harris Bank, Goldman Sachs Specialty Lending Group, L.P., and Guggenheim Credit Services, LLC                  
Debt Instrument [Line Items]                  
Revolving line of credit $ 75,000,000.0                
Commitment fee percentage 0.375%                
Line of credit facility, additional borrowing limit $ 15,000,000.0                
Write off of deferred debt issuance costs       $ 1,100,000          
Revolving credit facility | Credit Agreement With BMO Harris Bank, Goldman Sachs Specialty Lending Group, L.P., and Guggenheim Credit Services, LLC | Minimum | LIBOR                  
Debt Instrument [Line Items]                  
Basis spread on variable rate 2.00%                
Revolving credit facility | Credit Agreement With BMO Harris Bank, Goldman Sachs Specialty Lending Group, L.P., and Guggenheim Credit Services, LLC | Minimum | Base Rate                  
Debt Instrument [Line Items]                  
Basis spread on variable rate 1.00%                
Revolving credit facility | Credit Agreement With BMO Harris Bank, Goldman Sachs Specialty Lending Group, L.P., and Guggenheim Credit Services, LLC | Maximum | LIBOR                  
Debt Instrument [Line Items]                  
Basis spread on variable rate 2.50%                
Revolving credit facility | Credit Agreement With BMO Harris Bank, Goldman Sachs Specialty Lending Group, L.P., and Guggenheim Credit Services, LLC | Maximum | Base Rate                  
Debt Instrument [Line Items]                  
Basis spread on variable rate 1.50%