SHAREHOLDERS' EQUITY: (Details 2)						12 Months Ended				12 Months Ended
	Sep. 30, 2012	Sep. 30, 2012 Stock Options	Sep. 30, 2011 Stock Options	Sep. 30, 2010 Stock Options	Sep. 30, 2012 2000 Plans	Sep. 30, 2012 2000 Director Plan Restricted Stock	Sep. 30, 2012 2006 Plan	Aug. 11, 2011 2006 Plan	Apr. 27, 2011 2006 Plan	Sep. 30, 2012 2006 Plan Stock Options	Sep. 30, 2012 2006 Plan Stock Options Minimum	Sep. 30, 2012 2006 Plan Stock appreciation right	Sep. 30, 2012 2006 Plan Stock appreciation right Minimum	Sep. 30, 2012 2006 Plan Performance shares Minimum	Sep. 30, 2012 2006 Plan Performance shares Maximum
Stock Option Plans
Number of shares approved for grant								3,001,625	1,250,000
Purchase period						1 year
Number of options outstanding (in shares)		1,362,500	1,537,500	722,500
Number of shares of common stock that may be delivered to participants under the plan	1,079,847				251,625		2,750,000
Expiration term										10 years		10 years
Performance period														1 year	5 years
Exercise price expressed as a percentage of the fair market value of the shares on the date of grant											100.00%		100.00%