CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (USD $) In Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Deferred Compensation, Share-based Payments [Member]	Total
Balance at Sep. 30, 2010	$ 18,645	$ 460,955	$ 431,584	$ (213,560)	$ 17,582	$ (4,491)	$ 710,715
Balance (in Shares) at Sep. 30, 2010	74,580			12,466
Net income (loss)			(7,431)				(7,431)
Common stock issued for options exercised	85	2,425					2,510
Common stock issued for options exercised (in Shares)	339
Tax effect from exercise/vesting of equity awards, net		7					7
Amortization of deferred compensation						668	668
Common stock acquired				(18,139)			(18,139)
Common stock acquired (in Shares)				1,968
Equity awards granted, net	316	(588)					(272)
Equity awards granted, net (in Shares)	1,265
ESOP purchase of common stock						(19,973)	(19,973)
ESOP allocation of common stock		173					173
Stock-based compensation		8,956					8,956
Other comprehensive income (loss), net of tax					(25,306)		(25,306)
Balance at Sep. 30, 2011	19,046	471,928	424,153	(231,699)	(7,724)	(23,796)	651,908
Balance (in Shares) at Sep. 30, 2011	76,184			14,434
Net income (loss)			17,011				17,011
Dividend			(4,743)				(4,743)
Tax effect from exercise/vesting of equity awards, net		834					834
Amortization of deferred compensation						2,031	2,031
Common stock acquired				(10,382)			(10,382)
Common stock acquired (in Shares)				1,187
Equity awards granted, net	81	(1,064)					(983)
Equity awards granted, net (in Shares)	325
ESOP allocation of common stock		(128)					(128)
Stock-based compensation		10,439					10,439
Other comprehensive income (loss), net of tax					(11,835)		(11,835)
Balance at Sep. 30, 2012	19,127	482,009	436,421	(242,081)	(19,559)	(21,765)	654,152
Balance (in Shares) at Sep. 30, 2012	76,509			15,621
Net income (loss)			3,767				3,767
Dividend			(5,825)				(5,825)
Tax effect from exercise/vesting of equity awards, net		150					150
Amortization of deferred compensation						1,991	1,991
Common stock acquired				(32,521)			(32,521)
Common stock acquired (in Shares)				2,906
Equity awards granted, net	277	(472)					(195)
Equity awards granted, net (in Shares)	1,107
ESOP allocation of common stock		230					230
Stock-based compensation		12,495					12,495
Other comprehensive income (loss), net of tax					16,220		16,220
Balance at Sep. 30, 2013	$ 19,404	$ 494,412	$ 434,363	$ (274,602)	$ (3,339)	$ (19,774)	$ 650,464
Balance (in Shares) at Sep. 30, 2013	77,616			18,527