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LONG-TERM DEBT AND LINES OF CREDIT - Narrative (Details)
7 Months Ended 12 Months Ended 18 Months Ended 26 Months Ended 50 Months Ended 59 Months Ended 71 Months Ended 88 Months Ended
Dec. 31, 2016
USD ($)
Dec. 31, 2018
USD ($)
$ / shares
Rate
Dec. 31, 2017
USD ($)
May 31, 2016
USD ($)
Dec. 31, 2022
Jun. 30, 2019
Jun. 30, 2021
Mar. 31, 2022
Mar. 31, 2023
Sep. 30, 2025
Sep. 30, 2020
Jun. 30, 2020
Oct. 18, 2018
USD ($)
Jun. 30, 2018
USD ($)
Debt Instrument [Line Items]                            
Face amount of debt instrument   $ 124,176,000 $ 108,979,000                      
Other restrictions on payment of dividends (USD per share) | $ / shares   $ 0.01                        
Reclassification of net unrealized (gains) losses on hedging activities to interest expense $ 4,222,000 $ (4,792,000) 5,673,000 $ 8,240,000                    
Interest expense 108,600,000 195,500,000 174,300,000 $ 67,900,000                    
Secured Debt | Term Loan A                            
Debt Instrument [Line Items]                            
Face amount of debt instrument   $ 1,500,000,000.0                        
Effective interest rate (as a percent) | Rate   4.02%                        
Secured Debt | Term Loan A-2                            
Debt Instrument [Line Items]                            
Face amount of debt instrument   $ 1,370,000,000.00                        
Effective interest rate (as a percent) | Rate   4.01%                        
Secured Debt | Term Loan B-2                            
Debt Instrument [Line Items]                            
Face amount of debt instrument   $ 1,140,000,000.00                        
Effective interest rate (as a percent) | Rate   4.27%                        
Secured Debt | Term Loan B-4                            
Debt Instrument [Line Items]                            
Face amount of debt instrument                         $ 500,000,000.0  
Effective interest rate (as a percent) | Rate   4.27%                        
Interest Rate Swap                            
Debt Instrument [Line Items]                            
Reclassification of net unrealized (gains) losses on hedging activities to interest expense   $ 5,500,000                        
Line of Credit                            
Debt Instrument [Line Items]                            
Maximum borrowing capacity   828,200,000.0                        
Available borrowings under credit facility   710,300,000                        
Repayments of lines of credit $ 59,300,000 70,600,000                        
Amount outstanding under lines of credit, current   $ 700,500,000 $ 635,200,000                      
Weighted-average interest rate of short-term debt (as a percent)   2.97% 1.97%                      
Average outstanding amount under credit facility   $ 398,300,000                        
Revolving Credit Facility                            
Debt Instrument [Line Items]                            
Minimum interest coverage ratio   3.25                        
Revolving Credit Facility | Secured Debt                            
Debt Instrument [Line Items]                            
Face amount of debt instrument   $ 1,500,000,000.0                        
Maximum borrowing capacity                           $ 5,500,000,000.0
Effective interest rate (as a percent) | Rate   3.92%                        
Revolving Credit Facility | Forecast                            
Debt Instrument [Line Items]                            
Maximum covenant leverage ratio           5         4.5 4.75    
Revolving Credit Facility | Forecast | Term Loan A                            
Debt Instrument [Line Items]                            
Quarterly installment payments on principal (as a percent)         2.50% 0.625% 1.25% 1.875%            
Revolving Credit Facility | Forecast | Term Loan B-2                            
Debt Instrument [Line Items]                            
Quarterly installment payments on principal (as a percent)                 0.25%          
Revolving Credit Facility | Forecast | Term Loan B-4                            
Debt Instrument [Line Items]                            
Quarterly installment payments on principal (as a percent)                   0.25%        
Letter of Credit | Line of Credit                            
Debt Instrument [Line Items]                            
Maximum borrowing capacity   $ 100,000,000                        
Standby Letters of Credit | Line of Credit                            
Debt Instrument [Line Items]                            
Available borrowings under credit facility   $ 783,600,000                        
Minimum | Revolving Credit Facility                            
Debt Instrument [Line Items]                            
Commitment fee (as a percent)   0.20%                        
Maximum | Revolving Credit Facility                            
Debt Instrument [Line Items]                            
Commitment fee (as a percent)   0.30%