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EARNINGS PER COMMON SHARE ("EPS") (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Earnings [Abstract]
Net Income	$ 14,283	$ 5,181	$ 18,341	$ 8,776
Basic EPS [Abstract]
Weighted average common shares outstanding (in shares)	8,496,357	6,546,071	8,369,523	6,362,921
Less weighted average nonvested shares (in shares)	(29,533)	(4,717)	(28,410)	(4,327)
Weighted average common shares outstanding (in shares)	8,466,825	6,541,354	8,341,112	6,358,594
Earnings Per Common Share [Abstract]
Basic (in dollars per share)	$ 1.69	$ 0.79	$ 2.20	$ 1.38
Diluted EPS [Abstract]
Weighted average common shares outstanding for basic earnings per common share (in shares)	8,466,825	6,541,354	8,341,112	6,358,594
Add dilutive effect of assumed exercises of stock options, net of tax benefits (in shares)	58,248	60,060	62,598	60,617
Weighted average common and dilutive potential common shares outstanding (in shares)	8,525,072	6,601,414	8,403,711	6,419,211
Earnings Per Common Share [Abstract]
Diluted (in dollars per share)	$ 1.68	$ 0.78	$ 2.18	$ 1.37
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Securities excluded from computing diluted EPS (in shares)		29,199		29,199

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