Quarterly report pursuant to Section 13 or 15(d)

Financing Agreements - Narrative (Details)

v3.3.1.900
Financing Agreements - Narrative (Details)
 3 Months Ended
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Sep. 30, 2015
USD ($)
Dec. 19, 2014
USD ($)
Dec. 15, 2014
Debt instrument [Line Items]          
Total debt $ 623,000,000   $ 528,100,000    
Maximum ratio of Indebtedness to EBITDA allowed 3.5        
Minimum ratio of EBITDA to interest expense allowed 3.5        
Restricted cash and cash equivalent $ 700,000   800,000    
$700 revolving credit facility (excluding outstanding letters of credit)          
Debt instrument [Line Items]          
Total debt     107,600,000    
Line of credit facility, maximum borrowing capacity 343,700,000     $ 700,000,000.0  
Letters of credit outstanding, amount 15,100,000        
Line of credit facility, remaining borrowing capacity $ 479,800,000        
Weighted average interest rates 1.21% 1.27%      
Weighted average facility fee 0.18% 0.25%      
Term loan          
Debt instrument [Line Items]          
Total debt     171,000,000    
Debt instrument, face amount       $ 180,000,000.0  
Weighted average interest rates 1.46% 1.54%      
Other financing agreements          
Debt instrument [Line Items]          
Line of credit facility, maximum borrowing capacity $ 213,300,000        
Line of credit facility, amount utilized for bank guarantees 124,500,000        
$100 Series A Notes          
Debt instrument [Line Items]          
Total debt     $ 100,000,000    
Stated interest rate         4.60%
Debt instrument, face amount 100,000,000 $ 100,000,000      
Syndicated credit facility          
Debt instrument [Line Items]          
Line of credit facility, maximum borrowing capacity $ 150,000,000