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Note 15 - Debt (Details Textual)
$ in Millions
2 Months Ended 12 Months Ended
May 03, 2021
USD ($)
Aug. 15, 2019
USD ($)
Feb. 22, 2022
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Interest Payable, Current       $ 16.3 $ 20.7  
Interest Expense Excluding Earn Out Interest       127.0 138.3 $ 125.7
Letters of Credit Outstanding, Amount       5.1 5.4  
Revolving Credit Facility [Member]            
Line of Credit Facility, Maximum Borrowing Capacity   $ 1,000.0        
Debt Instrument, Leverage Ratio   3.5        
Line of Credit Facility, Remaining Borrowing Capacity       384.9 $ 944.6  
Revolving Credit Facility [Member] | Subsequent Event [Member]            
Repayments of Lines of Credit     $ 130.0      
Long-term Line of Credit, Total     $ 480.0      
Revolving Credit Facility [Member] | Minimum [Member]            
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage   0.08%        
Debt Instrument, Leverage Ratio   4.0        
Revolving Credit Facility [Member] | Maximum [Member]            
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage   0.20%        
Debt Instrument, Leverage Ratio   4.25        
Revolving Credit Facility [Member] | Prime Rate [Member] | Minimum [Member]            
Debt Instrument, Basis Spread on Variable Rate   1.00%        
Revolving Credit Facility [Member] | Prime Rate [Member] | Maximum [Member]            
Debt Instrument, Basis Spread on Variable Rate   1.625%        
The 5.800% Senior Note [Member]            
Debt Instrument, Interest Rate, Stated Percentage 5.80%       5.80%  
Repayments of Debt $ 450.0          
Repayments of Debt, Paid With Borrowings $ 250.0          
Senior Notes [Member]            
Long-term Debt, Gross       $ 2,700.0 $ 3,150.0