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Credit Agreements - Additional Information (Details)
¥ in Millions
1 Months Ended 3 Months Ended 12 Months Ended
Feb. 29, 2020
USD ($)
Apr. 03, 2018
USD ($)
May 31, 2018
USD ($)
Dec. 31, 2021
USD ($)
Sep. 30, 2021
USD ($)
Dec. 31, 2021
CNY (¥)
Sep. 30, 2019
CNY (¥)
Debt Instrument [Line Items]              
Debt, net       $ 819,000,000.0 $ 818,800,000    
Letters of credit outstanding       16,900,000      
Uncommitted Line of Credit              
Debt Instrument [Line Items]              
Available borrowing capacity | ¥           ¥ 220.0 ¥ 220.0
Short term debt              
Line of credit outstanding       $ 0 0    
Line of credit variable interest rate       4.30%   4.30%  
Revolving Credit Facility              
Debt Instrument [Line Items]              
Line of credit facility, maximum borrowing capacity   $ 850,000,000          
Maturity month and year   2023-04          
Available borrowing capacity       $ 833,100,000      
Letter of Credit              
Debt Instrument [Line Items]              
Letter of credit fees percentage on available borrowing capacity, low end of range (as a percent)       0.563%      
Letter of credit fees percentage on available borrowing capacity, high end of range (as a percent)       1.75%      
Senior Term Loan              
Debt Instrument [Line Items]              
Maturity month and year   2023-04          
Debt, net   $ 325,000,000   $ 224,800,000 $ 224,800,000    
Quarterly principal installment, at commencement   4,100,000          
Payment due at maturity   $ 264,100,000          
Amount of balloon payment paid       $ 39,100,000      
Weighted-average interest rate (as a percent)       1.35%   1.35%  
Senior Credit Agreement              
Debt Instrument [Line Items]              
Interest spread in basis points (as a percent)       1.25%      
Maximum leverage ratio       3.75   3.75  
Minimum interest coverage ratio       2.50   2.50  
Senior Credit Agreement | Minimum              
Debt Instrument [Line Items]              
Revolving credit facility, unused commitment fee rate (as a percent)       0.125%      
Senior Credit Agreement | Maximum              
Debt Instrument [Line Items]              
Revolving credit facility, unused commitment fee rate (as a percent)       0.275%      
Senior Credit Agreement | Federal Funds Rate              
Debt Instrument [Line Items]              
Interest spread in basis points (as a percent)       0.50%      
Senior Credit Agreement | LIBOR              
Debt Instrument [Line Items]              
Interest spread in basis points (as a percent)       1.00%      
4.600% Senior Notes due May 2028              
Debt Instrument [Line Items]              
Maturity month and year       2028-05 2028-05    
Debt, net       $ 297,500,000 $ 297,400,000    
Long term debt              
Debt issued     $ 300,000,000.0        
Debt instrument interest rate, stated percentage     4.60% 4.60% 4.60% 4.60%  
Maturity date     May 15, 2028        
Debt instruments              
Debt instrument, fair value       $ 338,000,000 $ 344,000,000    
3.100% Senior Notes due March 2030              
Debt Instrument [Line Items]              
Maturity month and year       2030-03 2030-03    
Debt, net       $ 296,700,000 $ 296,600,000    
Long term debt              
Debt issued $ 300,000,000.0            
Debt instrument interest rate, stated percentage 3.10%     3.10% 3.10% 3.10%  
Maturity date Mar. 01, 2030            
Debt instruments              
Debt instrument, fair value       $ 313,000,000 $ 317,000,000