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Senior Notes (Tables) | 3 Months Ended
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Dec. 31, 2018
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 December 31, 2018 and September 30, 2018:
| December 31, 2018 |  | September 30, 2018
| Carrying Amounts (1) |  | Fair Value |  | Carrying Amounts (1) |  | Fair Value
| (In thousands)
The 2010 Senior Notes | 113,000 |  |  | 114,144 |  |  | 113,000 |  |  | 114,413 |
The 2018 Senior Notes | 400,000 |  |  | 388,000 |  |  | 400,000 |  |  | 404,000 |
Total | $ | 513,000 |  |  | $ | 502,144 |  |  | $ | 513,000 |  |  | $ | 518,413 |
(1) Amounts exclusive of net debt issuance cost of $5.8 million and $6.1 million at December 31, 2018 and September 30, 2018, respectively.

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