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, 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 (loss)			30,486			30,486
Dividends paid ($0.88, $0.88 and $0.88 per share for the year ended September 30, 2015, 2016 and 2017, 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 (loss)			5,020			5,020
Dividends paid ($0.88, $0.88 and $0.88 per share for the year ended September 30, 2015, 2016 and 2017, 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 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
Increase (Decrease) in Stockholders' Equity
Net income (loss)			(10,190)			(10,190)
Dividends paid ($0.88, $0.88 and $0.88 per share for the year ended September 30, 2015, 2016 and 2017, respectively)			(11,009)			(11,009)
Other comprehensive income (loss)					41,829	41,829
Issue restricted stock (less forfeitures)	$ 1	(1)
Issue restricted stock (less forfeitures) (in shares)	24,625
Purchase of treasury stock				(266)		(266)
Purchase of treasury stock (in shares)	(6,017)
Stock compensation		2,109				2,109
Balance at Sep. 30, 2017	$ 13	$ 248,733	$ 159,366	$ (1,646)	$ (72,694)	$ 333,772
Balance (in shares) at Sep. 30, 2017	12,509,757