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Financial Commitments (Narrative) (Details)
1 Months Ended 3 Months Ended
May 02, 2023
Aug. 18, 2020
USD ($)
Oct. 31, 2022
Mar. 31, 2023
USD ($)
Dec. 31, 2023
Sep. 30, 2023
Jun. 30, 2023
Apr. 01, 2023
Dec. 31, 2022
USD ($)
Sep. 30, 2022
Jan. 01, 2022
Apr. 20, 2017
USD ($)
Debt Instrument [Line Items]                        
Current maturities of long-term debt       $ 66,228,000         $ 70,285,000      
Term Loan B                        
Debt Instrument [Line Items]                        
Current maturities of long-term debt       $ 44,000,000         44,000,000      
BMO Harris Bank                        
Debt Instrument [Line Items]                        
Applicable margin on overdue amounts (as a percent)   2.00%                    
BMO Harris Bank | Unsecured Debt                        
Debt Instrument [Line Items]                        
Fixed charge coverage ratio (maximum)   2.00                    
2020 Credit Agreement | BMO Harris Bank | Federal Funds Rate                        
Debt Instrument [Line Items]                        
Basis spread on variable rate   0.50% 0.50%                  
2020 Credit Agreement | BMO Harris Bank | LIBOR                        
Debt Instrument [Line Items]                        
Basis spread on variable rate   1.00%                    
2020 Credit Agreement | BMO Harris Bank | Secured Overnight Financing Rate (SOFR)                        
Debt Instrument [Line Items]                        
Basis spread on variable rate     1.00%                  
Debt instrument, basis spread on variable rate adjustment     0.10%                  
2020 Credit Agreement | BMO Harris Bank | Secured Overnight Financing Rate (SOFR) | Forecast                        
Debt Instrument [Line Items]                        
Basis point spread, 1 month interest period 0.11448%                      
Basis point spread, 3 month interest period 0.26161%                      
Basis point spread, 6 month interest period 0.42826%                      
2020 Credit Agreement | BMO Harris Bank | Line of Credit                        
Debt Instrument [Line Items]                        
Maximum borrowing capacity   $ 425,000,000                    
Periodic payment principal percentage   0.25%                    
Term Loan B | BMO Harris Bank | LIBOR | Minimum                        
Debt Instrument [Line Items]                        
Basis spread on variable rate   4.50%                    
Term Loan B | BMO Harris Bank | LIBOR | Maximum                        
Debt Instrument [Line Items]                        
Basis spread on variable rate   4.75%                    
Term Loan B | BMO Harris Bank | Base Rate | Minimum                        
Debt Instrument [Line Items]                        
Basis spread on variable rate   3.50%                    
Term Loan B | BMO Harris Bank | Base Rate | Maximum                        
Debt Instrument [Line Items]                        
Basis spread on variable rate   3.75%                    
First Lien | BMO Harris Bank                        
Debt Instrument [Line Items]                        
Net leverage ratio (maximum)   1.35                    
2017 Senior Notes | Senior Notes | Private Placement                        
Debt Instrument [Line Items]                        
Face amount                       $ 500,000,000
Interest rate                       6.875%
Redemption price, change of control triggering event (as a percent)       101.00%                
Revolving Credit Facility                        
Debt Instrument [Line Items]                        
Unamortized debt issuance costs       $ 1,900,000         $ 1,600,000      
Revolving Credit Facility | BMO Harris Bank                        
Debt Instrument [Line Items]                        
Weighted-average annual interest rate on borrowings       11.58%                
Remaining borrowing capacity       $ 145,000,000                
Revolving Credit Facility | BMO Harris Bank | Secured Overnight Financing Rate (SOFR) | Minimum                        
Debt Instrument [Line Items]                        
Basis spread on variable rate   4.25%                    
Revolving Credit Facility | BMO Harris Bank | Secured Overnight Financing Rate (SOFR) | Maximum                        
Debt Instrument [Line Items]                        
Basis spread on variable rate   4.75%                    
Revolving Credit Facility | BMO Harris Bank | Base Rate | Minimum                        
Debt Instrument [Line Items]                        
Basis spread on variable rate   3.25%                    
Revolving Credit Facility | BMO Harris Bank | Base Rate | Maximum                        
Debt Instrument [Line Items]                        
Basis spread on variable rate   3.75%                    
Revolving Credit Facility | BMO Harris Bank | Net Leverage Ratio                        
Debt Instrument [Line Items]                        
Net leverage ratio (maximum)   2.75 2.75 3.75 2.25 2.50 3.00 2.25 3.50 2.25 2.25  
Revolving Credit Facility | 2020 Credit Agreement | BMO Harris Bank                        
Debt Instrument [Line Items]                        
Increase in line of credit   $ 173,500,000                    
Accordion feature, percentage of LTM EBITDA   50.00%                    
Revolving Credit Facility | 2020 Credit Agreement | BMO Harris Bank | Line of Credit                        
Debt Instrument [Line Items]                        
Maximum borrowing capacity   $ 175,000,000                    
Letters of Credit | 2020 Credit Agreement | BMO Harris Bank | Line of Credit                        
Debt Instrument [Line Items]                        
Maximum borrowing capacity   75,000,000                    
Bridge Loan | 2020 Credit Agreement | BMO Harris Bank | Line of Credit                        
Debt Instrument [Line Items]                        
Maximum borrowing capacity   $ 10,000,000                    
Secured Debt | BMO Harris Bank | Unsecured Debt | Junior Lien                        
Debt Instrument [Line Items]                        
Total net leverage ratio (maximum)   3.50