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REPURCHASE OF COMPANY SHARES: (Details) (Common Stock, USD $)	12 Months Ended
	Sep. 30, 2012
REPURCHASE OF COMPANY SHARES
Shares repurchased	17,000
Cost of shares repurchased (in dollars)	$ 918,000
Price per share of shares repurchased (in dollars per share)	$ 54.00
Maximum
REPURCHASE OF COMPANY SHARES
Number of shares of common stock authorized to be repurchased	50,000
Maximum \| Subsequent event
REPURCHASE OF COMPANY SHARES
Number of shares of common stock authorized to be repurchased	50,000

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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- Definition

Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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