CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock	Additional Paid-in Capital	Accumulated Earnings	Accumulated Other Comprehensive Loss
Balance at Sep. 30, 2009	$ 278,799	$ 12	$ 227,734	$ 103,509	$ (52,456)
Balance (in shares) at Sep. 30, 2009		12,101,829
Increase (Decrease) in Stockholders' Equity
Net income	8,875			8,875
Dividends paid	(9,707)			(9,707)
Other comprehensive loss	(13,581)				(13,581)
Tax impact of forfeited vested options	(74)		(74)
Issue restricted stock (less forfeitures) (in shares)		42,250
Stock compensation	1,537		1,537
Balance at Sep. 30, 2010	265,849	12	229,197	102,677	(66,037)
Balance (in shares) at Sep. 30, 2010		12,144,079
Increase (Decrease) in Stockholders' Equity
Net income	31,128			31,128
Dividends paid	(9,758)			(9,758)
Other comprehensive loss	(17,011)				(17,011)
Exercise of stock options	872		872
Exercise of stock options (in shares)		28,400
Tax impact of forfeited vested options	(10)		(10)
Tax impact of dividends on restricted stock	31		31
Issue restricted stock (less forfeitures) (in shares)		31,700
Stock compensation	1,752		1,752
Balance at Sep. 30, 2011	272,853	12	231,842	124,047	(83,048)
Balance (in shares) at Sep. 30, 2011		12,204,179
Increase (Decrease) in Stockholders' Equity
Net income	50,182			50,182
Dividends paid	(10,803)			(10,803)
Other comprehensive loss	(16,043)				(16,043)
Exercise of stock options	2,782		2,782
Exercise of stock options (in shares)		77,611
Tax impact of dividends on restricted stock	48		48
Issue restricted stock (less forfeitures) (in shares)		6,000
Stock compensation	2,079		2,079
Balance at Sep. 30, 2012	$ 301,098	$ 12	$ 236,751	$ 163,426	$ (99,091)
Balance (in shares) at Sep. 30, 2012		12,287,790