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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - AVAILABLE FOR SALE SECURITIES (Details) (USD $)
 3 Months Ended 12 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Accounting Policies [Abstract]    
Available-for-sale securities, fair value disclosure $ 11,192,000 [1] $ 11,716,000
Available-for-sale securities, gross unrealized gain (loss) 8,600,000 9,100,000
Accumulated other comprehensive income, available-for-sale securities adjustment, net of tax $ 5,100,000 $ 5,400,000
[1] Included in Other noncurrent assets on the Unaudited Condensed Consolidated Balance Sheets