Annual report pursuant to Section 13 and 15(d)

Financing Agreements Financing Agreements - Schedule of borrowings (Details)

v3.19.3
Financing Agreements Financing Agreements - Schedule of borrowings (Details) - USD ($)
Sep. 30, 2019
Sep. 25, 2019
Sep. 30, 2018
Jul. 09, 2010
Debt Instrument [Line Items]        
Long-term Debt $ 619,500,000   $ 344,600,000  
Current portion of long-term debt 0   0  
Long-term debt 619,500,000   344,600,000  
2010 Notes        
Debt Instrument [Line Items]        
Long-term Debt 370,100,000 $ 374,400,000 0  
$150 senior unsecured notes        
Debt Instrument [Line Items]        
Long-term Debt 149,700,000   149,300,000 $ 148,400,000
$100 Series A Notes (3)        
Debt Instrument [Line Items]        
Long-term Debt 99,700,000   99,600,000  
Line of Credit [Member]        
Debt Instrument [Line Items]        
Long-term Debt $ 0   $ 95,700,000