STOCKHOLDERS' EQUITY AND EQUITY COMPENSATION (Detail) - Summary of stock option activity (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Outstanding	1,169,661	1,544,221	1,690,339
Outstanding (in Dollars per share)	$ 17.50	$ 15.42	$ 15.18
Outstanding	929,761	1,169,661	1,544,221
Outstanding (in Dollars per share)	$ 18.73	$ 17.50	$ 15.42
Outstanding (in Dollars)	$ 0	$ 1,667	$ 1,667
Outstanding	3 years 146 days	3 years 255 days	3 years 328 days
Exercisable at September 30, 2012 through:
September 30, 2013	215,526
September 30, 2013 (in Dollars per share)	$ 14.01
September 30, 2013	6 months
September 30, 2014	129,750
September 30, 2014 (in Dollars per share)	$ 19.88
September 30, 2014	1 year 219 days
September 30, 2015	147,035
September 30, 2015 (in Dollars per share)	$ 18.50
September 30, 2015	2 years 255 days
September 30, 2016	73,450
September 30, 2016 (in Dollars per share)	$ 25.66
September 30, 2016	3 years 219 days
September 30, 2017	14,000
September 30, 2017 (in Dollars per share)	$ 14.78
September 30, 2017	4 years 292 days
September 30, 2018	0
September 30, 2019	350,000
September 30, 2019 (in Dollars per share)	$ 20.00
September 30, 2019	6 years
Exercisable	929,761	1,169,661	1,421,930
Exercisable (in Dollars per share)	$ 18.73	$ 17.50	$ 15.04
Exercisable (in Dollars)	0	1,667	1,667
Exercisable	3 years 146 days	3 years 255 days	3 years 6 months
Granted	0	0	0
Exercised	0	(333,125)	(54,075)
Exercised (in Dollars per share)		$ 7.74	$ 6.33
Exercised (in Dollars)		$ 1,848	$ 337
Forfeited/expired	(239,900)	(41,435)	(92,043)
Forfeited/expired (in Dollars per share)	$ 12.74	$ 18.34	$ 16.46