FAIR VALUE - DEBT (Details) (USD $)	Dec. 31, 2014		Sep. 30, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Capital Leased Assets, Noncurrent, Fair Value Disclosure	$ 55,400,000		$ 57,700,000
Level 2 [Member] | Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	682,845,000	[1]	557,845,000	[1]
Level 2 [Member] | Fair Market Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	$ 720,903,000		$ 586,909,000

[1] (1)Excludes capital leases of $55.4 million and $57.7 million as of December 31, 2014 and September 30, 2014, respectively.