STOCKHOLDERS' EQUITY AND EQUITY COMPENSATION (Details) (USD $)	0 Months Ended		1 Months Ended		12 Months Ended			48 Months Ended	0 Months Ended			0 Months Ended		12 Months Ended		12 Months Ended			0 Months Ended	12 Months Ended
	Dec. 10, 2013	Nov. 12, 2013	May 31, 2014	Aug. 31, 2011	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2014	Jan. 10, 2014 Northcote Holdings Pty. Ltd [Member]	Jan. 10, 2014 Northcote Holdings Pty. Ltd [Member]	Dec. 10, 2013 GS Direct [Member]	Jan. 30, 2014 Incentive Plan [Member]	Sep. 30, 2014 Incentive Plan [Member]	Sep. 30, 2014 Incentive Stock Options [Member]	Sep. 30, 2014 2006 Equity Incentive Plan [Member]	Sep. 30, 2014 Restricted Stock [Member]	Sep. 30, 2013 Restricted Stock [Member]	Sep. 30, 2012 Restricted Stock [Member]	Jan. 10, 2014 Restricted Stock [Member] Northcote Holdings Pty. Ltd [Member] installment	Sep. 30, 2014 Restricted Stock [Member] Minimum [Member]	Sep. 30, 2014 Restricted Stock [Member] Maximum [Member]
STOCKHOLDERS' EQUITY AND EQUITY COMPENSATION (Details) [Line Items]
Common stock, dividends, per share, cash paid (in Dollars per share)					$ 0.12	$ 0.10	$ 0.08
Share-based payment award, number of additional shares authorized												1,200,000
Share-based payment award, description					Options granted under the Incentive Plan may be either “incentive stock options” or nonqualified stock options, generally expire ten years after the date of grant and are granted at an exercise price of not less than 100% of the fair market value at the date of grant.
Share-based payment award, expiration period					10 years
Maximum percentage of exercise price at grant date fair value					100.00%
Share-based payment award, number of shares authorized (in Shares)					4,774,100			4,774,100					4,200,000
Stock issued during period, shares, new issues (in Shares)														600,000
Share-based payment award, number of shares available for grant (in Shares)														984,297
Share based payment award equity instruments other than options additional grants in future (in Shares)															0
Share-based payment award, award vesting period																			3 years	3 years	4 years
Share-based payment award, options, vested in period, fair value					$ 14,058,000	$ 13,270,000	$ 428,000
Weighted average grant date fair value (in Dollars per share)																$ 12.96	$ 11.03	$ 9.33
Employee service share-based compensation, nonvested awards, compensation not yet recognized, share-based awards other than options					15,945,000			15,945,000
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized, period for recognition						1 year 6 months 24 days
Stock repurchased during period, shares (in Shares)	4,444,444				1,906,631	2,369,786	1,187,066	6,994,862
Stock repurchased during period, value	50,000,000				23,167,000	26,285,000	10,379,000	72,197,000
Stock repurchased during period per share (in Dollars per share)	$ 11.25				$ 12.15	$ 11.09	$ 8.74	$ 10.32
Stock repurchased during period, share price discount rate		9.20%
Stock repurchase program, authorized amount			50,000,000	50,000,000
Shares, outstanding											5,560,000
Percentage held common stock outstanding											10.00%
Stock issued during period, value, ESOP					20,000,000
Stock issued during period, shares, ESOP					1,591,117
ESOP, weighted average purchase price of shares purchased (in Dollars per share)					$ 12.57
Stock issued during period, shares, acquisitions									44,476
Stock issued during period, value, acquisitions									584,000
Business acquisition, share price (in Dollars per share)										$ 13.13
Share-based payment award, non-option equity instruments, granted (in Shares)																			1
Number of installments for vesting of stock awards																			3
Stock repurchase program, remaining authorized repurchase amount					38,860,000
Shares paid for tax withholding for share based compensation (in Shares)					466,131
Shares paid for tax withholding for share based compensation, value					$ 5,887,000
Shares paid for tax withholding for share based compensation, value per share (in Dollars per share)					$ 12.63