STOCKHOLDERS' EQUITY AND EQUITY COMPENSATION (Details)					12 Months Ended			49 Months Ended
	Jan. 30, 2014 shares	Jan. 10, 2014 USD ($) installment $ / shares shares	Dec. 10, 2013 USD ($) $ / shares shares	Nov. 12, 2013	Sep. 30, 2015 USD ($) $ / shares shares	Sep. 30, 2014 USD ($) $ / shares shares	Sep. 30, 2013 USD ($) $ / shares shares	Sep. 30, 2015 USD ($) $ / shares shares	Jul. 31, 2015 USD ($)	Mar. 31, 2015 USD ($)	May. 31, 2014 USD ($)	Aug. 31, 2011 USD ($)
STOCKHOLDERS' EQUITY AND EQUITY COMPENSATION (Details) [Line Items]
Common stock, dividends, per share, cash paid (in Dollars per share) | $ / shares					$ 0.16	$ 0.12	$ 0.10
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)					4,245,700			4,245,700
Share-based payment award, options, vested in period, fair value | $					$ 5,068,000	$ 14,058,000	$ 13,270,000
Employee service share-based compensation, nonvested awards, compensation not yet recognized, share-based awards other than options | $					$ 13,054,000			$ 13,054,000
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized, period for recognition					1 year 7 months
Stock repurchased during period, shares (in Shares)			4,444,444		5,311,915	1,906,631	2,369,786	16,751,221
Stock repurchased during period, value | $			$ 50,000,000		$ 80,934,000	$ 23,167,000	$ 26,285,000	$ 203,132,000
Stock repurchased during period per share (in Dollars per share) | $ / shares			$ 11.25		$ 15.24	$ 12.15	$ 11.09	$ 12.13
Repurchased on the open market, shares					12,306,777
Stock repurchased during period, share price discount rate				9.20%
Stock repurchase program, authorized amount | $			$ 50,000,000			$ 20,000,000			$ 50,000,000	$ 50,000,000	$ 50,000,000	$ 50,000,000
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) | $ / shares						$ 12.57
Stock repurchase program, remaining authorized repurchase amount | $					$ 57,926,000			$ 57,926,000
Shares paid for tax withholding for share based compensation (in Shares)					89,488
Shares paid for tax withholding for share based compensation, value | $					$ 1,409,000
Shares paid for tax withholding for share based compensation, value per share (in Dollars per share) | $ / shares					$ 15.74
Northcote Holdings Pty. Ltd [Member]
STOCKHOLDERS' EQUITY AND EQUITY COMPENSATION (Details) [Line Items]
Stock issued during period, shares, acquisitions		44,476
Stock issued during period, value, acquisitions | $		$ 584,000
Business acquisition, share price (in Dollars per share) | $ / shares		$ 13.13
GS Direct [Member]
STOCKHOLDERS' EQUITY AND EQUITY COMPENSATION (Details) [Line Items]
Shares, outstanding			5,560,000
Percentage held common stock outstanding			10.00%
Incentive Plan [Member]
STOCKHOLDERS' EQUITY AND EQUITY COMPENSATION (Details) [Line Items]
Share-based payment award, number of additional shares authorized	1,200,000
Share-based payment award, number of shares authorized (in Shares)	4,200,000
Incentive Stock Options [Member]
STOCKHOLDERS' EQUITY AND EQUITY COMPENSATION (Details) [Line Items]
Stock issued during period, shares, new issues (in Shares)	600,000
Share-based payment award, number of shares available for grant (in Shares)					420,206			420,206
2006 Equity Incentive Plan [Member]
STOCKHOLDERS' EQUITY AND EQUITY COMPENSATION (Details) [Line Items]
Share based payment award equity instruments other than options additional grants in future (in Shares)					0			0
Restricted Stock [Member]
STOCKHOLDERS' EQUITY AND EQUITY COMPENSATION (Details) [Line Items]
Share-based payment award, award vesting period					3 years
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period					687,506
Weighted average grant date fair value (in Dollars per share) | $ / shares					$ 13.05
Restricted Stock [Member] | Northcote Holdings Pty. Ltd [Member]
STOCKHOLDERS' EQUITY AND EQUITY COMPENSATION (Details) [Line Items]
Share-based payment award, award vesting period		3 years
Share-based payment award, non-option equity instruments, granted (in Shares)		1
Number of installments for vesting of stock awards | installment		3
Restricted Stock [Member] | Minimum [Member]
STOCKHOLDERS' EQUITY AND EQUITY COMPENSATION (Details) [Line Items]
Share-based payment award, award vesting period					3 years
Restricted Stock [Member] | Maximum [Member]
STOCKHOLDERS' EQUITY AND EQUITY COMPENSATION (Details) [Line Items]
Share-based payment award, award vesting period					4 years
Performance Shares [Member]
STOCKHOLDERS' EQUITY AND EQUITY COMPENSATION (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Grant Date Fair Value | $					$ 7,706,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period					604,715
Weighted average grant date fair value (in Dollars per share) | $ / shares					$ 12.74