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Senior Notes (Tables)
6 Months Ended
Mar. 31, 2019
Debt Disclosure [Abstract]  
Carrying Amounts and Fair Values of Senior Notes The following table presents the carrying amounts and fair values for the Senior Notes at March 31, 2019 and September 30, 2018:
 
March 31, 2019
 
September 30, 2018
 
Carrying
Amounts (*)
 
Fair Value
 
Carrying
Amounts (*)
 
Fair Value
 
(In thousands)
The 2010 Senior Notes
113,000

 
114,386

 
113,000

 
114,413

The 2018 Senior Notes
400,000

 
412,000

 
400,000

 
404,000

       Total
$
513,000

 
$
526,386

 
$
513,000

 
$
518,413


(*) Amounts exclusive of net debt issuance cost of $5.6 million and $6.1 million at March 31, 2019 and September 30, 2018, respectively.