SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - AVAILABLE FOR SALE SECURITIES (Details) (USD $)	Dec. 31, 2014		Sep. 30, 2014
Accounting Policies [Abstract]
Available-for-sale securities, fair value disclosure	$ 11,786,000	[1]	$ 10,672,000
Available-for-sale securities, gross unrealized gain (loss)	9,200,000		8,100,000
Accumulated other comprehensive income, available-for-sale securities adjustment, net of tax	$ 5,400,000		$ 4,800,000

[1] Included in other noncurrent assets on the Unaudited Condensed Consolidated Balance Sheets