Quarterly report pursuant to Section 13 or 15(d)

Financing Agreements - Narrative (Details)

v3.19.1
Financing Agreements - Narrative (Details)
€ in Millions
 3 Months Ended 6 Months Ended 12 Months Ended
Mar. 31, 2019
USD ($)
Mar. 31, 2018
USD ($)
Mar. 31, 2019
USD ($)
Mar. 31, 2018
USD ($)
Sep. 30, 2018
USD ($)
Mar. 31, 2019
EUR (€)
Dec. 15, 2014
Debt instrument [Line Items]              
Maximum ratio of Indebtedness to EBITDA allowed         3.5    
LeverageHolidayBusinessAcquisition         75.0    
Debt Instrument, Covenant Terms, Minimum Ratio of Earnings before Interest, Taxes, Depreciation, and Amortization to Interest Expense         3.0    
Short-term restricted cash included in other current assets $ 800,000 $ 500,000 $ 800,000 $ 500,000 $ 500,000.0    
$900 revolving credit facility (excluding outstanding letters of credit)              
Debt instrument [Line Items]              
Line of credit facility, maximum borrowing capacity 741,600,000   741,600,000        
Letters of Credit Outstanding, Amount 7,200,000   7,200,000        
Line of credit facility, remaining borrowing capacity $ 780,200,000   $ 780,200,000        
Weighted average interest rates 2.73% 2.03% 2.57% 1.82%      
Weighted average facility fee 0.12% 0.15% 0.11% 0.17%      
$150 senior unsecured notes, net of discount (1)              
Debt instrument [Line Items]              
Debt Issuance Costs, Net $ 300,000   $ 300,000   400,000    
Other Financing Agreements              
Debt instrument [Line Items]              
Line of credit facility, maximum borrowing capacity 300,900,000   300,900,000        
Line of credit facility, amount utilized for bank guarantees 210,600,000   210,600,000        
$100 Series A Notes (2)              
Debt instrument [Line Items]              
Stated interest rate             4.60%
Debt Issuance Costs, Net $ 400,000   $ 400,000   $ 400,000    
Syndicated credit facility              
Debt instrument [Line Items]              
Line of credit facility, maximum borrowing capacity | €           € 150.0  
Maximum              
Debt instrument [Line Items]              
Debt Instrument, Covenant Holiday, Maximum Ratio of Indebtedness to Earnings before Interest, Taxes, Depreciation, and Amortization         4.0