CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Accumulated Earnings	Treasury Stock	AOCI Attributable to Parent	Total
Balance at Sep. 30, 2013	$ 12	$ 238,941	$ 174,154	$ (505)	$ (56,799)	$ 355,803
Balance (in shares) at Sep. 30, 2013	12,332,592
Increase (Decrease) in Stockholders' Equity
Net income			3,751			3,751
Dividends paid ($0.88, $0.88 and $0.88 per share for the year ended September 30, 2014, 2015 and 2016, respectively)			(10,906)			(10,906)
Other comprehensive income (loss)					(5,029)	(5,029)
Exercise of stock options		1,519				1,519
Exercise of stock options (in shares)	54,913
Tax impact of forfeited vested options		158				158
Issue restricted stock (less forfeitures) (in shares)	37,250
Purchase of treasury stock				(335)		(335)
Purchase of treasury stock (in shares)	(6,284)
Stock compensation		1,769				1,769
Balance at Sep. 30, 2014	$ 12	242,387	166,999	(840)	(61,828)	346,730
Balance (in shares) at Sep. 30, 2014	12,418,471
Increase (Decrease) in Stockholders' Equity
Net income			30,486			30,486
Dividends paid ($0.88, $0.88 and $0.88 per share for the year ended September 30, 2014, 2015 and 2016, respectively)			(10,952)			(10,952)
Other comprehensive income (loss)					(26,125)	(26,125)
Tax impact of forfeited vested options		(28)				(28)
Tax impact of dividends on restricted stock		(55)				(55)
Issue restricted stock (less forfeitures) (in shares)	32,750
Purchase of treasury stock				(251)		(251)
Purchase of treasury stock (in shares)	(5,221)
Stock compensation		2,184				2,184
Balance at Sep. 30, 2015	$ 12	244,488	186,533	(1,091)	(87,953)	341,989
Balance (in shares) at Sep. 30, 2015	12,446,000
Increase (Decrease) in Stockholders' Equity
Net income			5,020			5,020
Dividends paid ($0.88, $0.88 and $0.88 per share for the year ended September 30, 2014, 2015 and 2016, respectively)			(10,988)			(10,988)
Other comprehensive income (loss)					(26,570)	(26,570)
Exercise of stock options		310				310
Exercise of stock options (in shares)	10,000
Tax impact of forfeited vested options		(114)				(114)
Tax impact of vesting and dividends on restricted stock		(39)				(39)
Issue restricted stock (less forfeitures) (in shares)	42,810
Purchase of treasury stock				(289)		(289)
Purchase of treasury stock (in shares)	(7,661)
Stock compensation		1,980				1,980
Balance at Sep. 30, 2016	$ 12	$ 246,625	$ 180,565	$ (1,380)	$ (114,523)	$ 311,299
Balance (in shares) at Sep. 30, 2016	12,491,149