Annual report pursuant to Section 13 and 15(d)

Financing Agreements (Details)

v3.8.0.1
Financing Agreements (Details)
€ in Millions
12 Months Ended
Dec. 19, 2014
USD ($)
Dec. 15, 2014
USD ($)
Jul. 09, 2010
USD ($)
Sep. 30, 2017
USD ($)
Sep. 30, 2016
USD ($)
Sep. 30, 2017
EUR (€)
Mar. 24, 2016
USD ($)
Jun. 03, 2013
EUR (€)
Nov. 19, 2012
USD ($)
Long-term Debt                  
Total debt       $ 465,700,000 $ 608,900,000        
Less: current portion       18,800,000 13,800,000        
Total long-term debt       446,900,000 595,100,000        
Maturities of long-term debt                  
2016       18,000,000          
2017       18,000,000          
2018       330,500,000          
2019       0          
2020       0          
$700 revolving credit facility                  
Financing Agreements                  
Long-term Debt, Gross       68,000,000 $ 198,500,000        
Maturities of long-term debt                  
Maximum borrowing capacity available under the facility $ 700,000,000.0                
Debt covenant, business acquisition value threshold 75,000,000                
Deferred financing costs 1,000,000               $ 2,000,000
Accordion option to increase commitments under the unsecured revolving credit facility 300,000,000.0                
Letters of credit outstanding       10,800,000          
Remaining borrowing capacity available under the credit facility       621,200,000          
Current borrowing capacity available under the facility       $ 554,400,000          
Weighted average interest rates (as a percent)       1.40% 1.48%        
Weighted average facility fee (as a percent)       0.23% 0.21%        
$700 revolving credit facility | Maximum                  
Maturities of long-term debt                  
Ratio of indebtedness to EBITDA       3.5          
$700 revolving credit facility | Minimum                  
Maturities of long-term debt                  
Ratio of Debt to interest expense       3.5          
$180 term loan                  
Financing Agreements                  
Long-term Debt, Gross       $ 148,500,000 $ 162,000,000        
Maturities of long-term debt                  
Debt issued $ 180,000,000                
Percentage of principal which will be repaid over the term of debt 38.00%                
Term of debt instrument 5 years                
Weighted average interest rates (as a percent)       2.27% 1.76%        
$150 senior unsecured notes                  
Financing Agreements                  
Long-term Debt, Gross       $ 149,500,000 $ 149,300,000        
Long-term Debt                  
Total debt       $ 148,900,000 148,500,000        
Total long-term debt     $ 148,400,000            
Maturities of long-term debt                  
Debt issued     150,000,000            
Deferred financing costs     $ 2,100,000            
Term of debt instrument       10 years          
Stated interest rate     5.50% 5.50%   5.50%      
Notes issued at a discount     $ 1,600,000            
Effective annual interest rate (as a percent)     5.65%            
Percentage of the principal amount at which the notes are redeemable due to a change of control     101.00%            
Debt Issuance Costs, Net       $ 600,000 800,000        
$100 Series A Notes (2)                  
Financing Agreements                  
Long-term Debt, Gross       100,000,000 100,000,000        
Long-term Debt                  
Total debt       99,700,000 99,600,000        
Maturities of long-term debt                  
Debt issued   $ 100,000,000.0              
Deferred financing costs   400,000              
Private Shelf Facility, Accordion Feature, Maximum   $ 150         $ 200    
Stated interest rate   4.60%              
Redemption price, percentage   100.00%              
Leverage holiday fee   0.75%              
Debt Issuance Costs, Net       300,000 400,000        
Other                  
Long-term Debt                  
Total debt       600,000 300,000        
Syndicated Credit Facility                  
Maturities of long-term debt                  
Maximum borrowing capacity available under the facility | €               € 150.0  
Deferred financing costs       $ 1,300,000          
Increase in financing capacity, exercise of accordion feature | €           € 70.0      
Charges for unused capacity (as a percent)       35.00%          
Applicable guarantee rate (as a percent)       0.90%   0.90%      
Borrowings under facilities       $ 0          
Other Financing Agreements                  
Maturities of long-term debt                  
Maximum borrowing capacity available under the facility       227,900,000          
Amount of credit facility utilized for providing bank guarantees       174,600,000          
Restricted cash       800,000 800,000        
Interest Rate Swap [Member] | Cash Flow Hedging                  
Maturities of long-term debt                  
Derivative, Notional Amount       50,000,000          
Cross Currency Interest Rate Contract [Member] | Cash Flow Hedging                  
Maturities of long-term debt                  
Derivative, Notional Amount       55,000,000          
Adjustments for New Accounting Pronouncement                  
Maturities of long-term debt                  
Debt Issuance Costs, Net       $ 900,000 $ 1,200,000