STOCK-BASED COMPENSATION, PERFORMANCE SHARES AND RESTRICTED STOCK ACTIVITY (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
		Sep. 30, 2016		Sep. 30, 2015		Sep. 30, 2014		Nov. 15, 2016	Nov. 10, 2015	Nov. 11, 2014
Performance share awards
Shares
Outstanding at beginning of period (in shares)	[1]	214,464		247,536		156,644
Granted (in shares)	[1]	115,480		102,790		147,728
Vested (in shares)	[1]	(137,053)	[2]	(112,446)	[3]	(56,836)	[4]
Cancelled/forfeited (in shares)	[1]	(12,975)	[5]	(23,416)	[6]
Outstanding at end of period (in shares)	[1]	179,916		214,464		247,536
Weighted Average Grant Date Fair Value
Outstanding at beginning of period (in dollars per share)		$ 23.40		$ 18.30		$ 18.35
Granted (in dollars per share)		27.37		28.25		20.28
Vested (in dollars per share)		21.40	[2]	17.10	[3]	23.59	[4]
Cancelled/forfeited (in dollars per share)		23.40	[5]	17.98	[6]
Outstanding at end of period (in dollars per share)		$ 27.47		$ 23.40		$ 18.30
Total Fair Value of Vested Shares		$ 5,657		$ 4,318		$ 2,756
Percent of awards to common stock, target				100.00%		100.00%
Performance share awards | Subsequent Event
Weighted Average Grant Date Fair Value
Number of common shared issued (in shares)								71,808
Percent of awards to common stock, target								150.00%
Performance share awards | Minimum
Weighted Average Grant Date Fair Value
Percent of awards to common stock		0.00%
Performance share awards | Maximum
Weighted Average Grant Date Fair Value
Percent of awards to common stock		150.00%
Performance Shares, Subject to Performance Conditions
Shares
Granted (in shares)	[1]	69,305		61,576		78,574
Weighted Average Grant Date Fair Value
Percent of awards to common stock				120.00%		150.00%
Number of common shared issued (in shares)				112,918		85,254			8,984	9,364
Number of shares canceled (in shares)									9,364
Performance Shares, Subject to Performance Conditions | Subsequent Event
Weighted Average Grant Date Fair Value
Percent of awards to common stock								100.00%
Number of common shared issued (in shares)								23,649
Number of shares canceled (in shares)								9,366
Performance Shares, TSR | Subsequent Event
Weighted Average Grant Date Fair Value
Percent of awards to common stock								85.00%
Number of common shared issued (in shares)								55,702
Restricted Stock
Shares
Outstanding at beginning of period (in shares)		81,492		41,491		78,511
Granted (in shares)		41,909		61,972		33,356
Vested (in shares)		(48,089)		(18,170)		(68,460)
Cancelled/forfeited (in shares)		(2,241)		(3,801)		(1,916)
Outstanding at end of period (in shares)		73,071		81,492		41,491
Weighted Average Grant Date Fair Value
Outstanding at beginning of period (in dollars per share)		$ 27.17		$ 22.60		$ 20.53
Granted (in dollars per share)		30.03		29.41		22.78
Vested (in dollars per share)		26.66		24.45		20.37
Cancelled/forfeited (in dollars per share)		29.21		26.79		20.37
Outstanding at end of period (in dollars per share)		$ 29.09		$ 27.17		$ 22.60
Total Fair Value of Vested Shares		$ 1,469		$ 510		$ 1,534

[1] The number of common shares issued related to certain performance shares may range from zero to 150 percent of the number of shares shown in the table above based on the Company’s achievement of performance goals.

[2] As certified by the Company’s Leadership and Compensation Committee on November 15, 2016, the number of common shares earned related to TSR performance was 85 percent or 55,702 shares, the number of common shares earned related to NFE performance was 150 percent or 71,808 shares, and the number of common shares earned related to Performance Based Restricted Stock was 100 percent or 23,649 shares. Each award earned excludes accumulated dividends. The number represented on this line is the target number of 100 percent

[3] As certified by the Company’s Leadership and Compensation Committee on November 10, 2015, the number of common shares related to performance shares earned was 120 percent, or 112,918 shares, excluding accumulated dividends. The number represented on this line is the target number of 100 percent. See footnote (1) above. Also included in the vested number are 9,364 shares certified by the Leadership and Compensation Committee on November 11, 2014 and 8,984 shares certified by the Leadership and Compensation Committee on November 10, 2015.

[4] As certified by the Company’s Leadership and Compensation Committee on November 11, 2014, the number of common shares related to performance shares earned was 150 percent, or 85,254 shares, excluding accumulated dividends. The number represented on this line is the target number of 100 percent. See footnote (1) above.

[5] As certified by the Company’s Leadership and Compensation Committee on November 15, 2016, 9,366 shares were canceled due to not achieving a certain performance target. The remainder were forfeitures due to individuals departing the company.

[6] As certified by the Company’s Leadership and Compensation Committee on November 10, 2015, 9,364 shares were canceled due to not achieving a certain performance target. The remainder were forfeitures due to individuals departing the company.