XML 74 R54.htm IDEA: XBRL DOCUMENT v3.5.0.2
FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENT - Equity Securities (Details)
$ in Thousands
3 Months Ended 12 Months Ended
Sep. 30, 2016
USD ($)
item
Sep. 30, 2014
USD ($)
Sep. 30, 2015
USD ($)
Available-for-sale securities      
Number of securities in an unrealized loss position under 30 days | item 1    
Other-than-temporary impairment charge $ 26,000    
Quoted Prices in Active Markets for Identical Assets (Level 1)      
Non-qualified Supplemental Savings Plan      
Assets held in Non-qualified Supplement Savings Plan, at fair value 13,400   $ 12,900
Equity securities      
Available-for-sale securities      
Cost 38,473   64,462
Gross Unrealized Gains 33,051   28,530
Gross Unrealized Losses     1,509
Equity available-for-sale securities sold, fair value   $ 49,200  
Total gross realized gain on such sales of available-for-sale securities   $ 45,200  
Equity securities | Total Measure at Fair Value      
Available-for-sale securities      
Estimated Fair Value $ 71,524   $ 91,483