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Long-Term Debt - Summary of Long-Term Debt (Details) (USD $)
In Thousands, unless otherwise specified

Jun. 30, 2014

Sep. 30, 2013

Debt Instrument

$ 1,467,406

$ 1,263,232

Senior Notes | 6.5% Senior Notes

Debt Instrument

657,406

658,232

Stated interest rate

6.50%

6.50%

Revolving Credit Facility | 2011 Revolving Credit Facility

Debt Instrument

$ 810,000

$ 605,000

Market adjustable interest rate (per annum)

2.40%

^[1]

3.00%

^[1]

[1]	After the impact of our interest rate swaps.

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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