CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Capital In Excess Of Par Value [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Deferred Compensation [Member]
Balance at Sep. 30, 2012	$ 654,152	$ 19,127	$ 482,009	$ 436,421	$ (242,081)	$ (19,559)	$ (21,765)
Balance (in Shares) at Sep. 30, 2012		76,509			15,621
Net income (loss)	3,767			3,767
Dividends	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	(195)	$ 277	(472)
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 taxes	16,220					16,220
Balance at Sep. 30, 2013	650,464	$ 19,404	494,412	434,363	$ (274,602)	(3,339)	(19,774)
Balance (in Shares) at Sep. 30, 2013		77,616			18,527
Net income (loss)	(177)			(177)
Dividends	6,273			6,273
Tax effect from exercise/vesting of equity awards, net	273		273
Amortization of deferred compensation	2,457						2,457
Common stock issued	584	$ 11	573
Common stock issued (in Shares)		44
Common stock acquired	(79,614)				$ (79,614)
Common stock acquired (in Shares)					6,808
Equity awards granted, net	(152)	$ 206	(358)
Equity awards granted, net (in Shares)		824
ESOP purchase of common stock	(20,000)						(20,000)
ESOP allocation of common stock	(283)		(283)
Stock-based compensation	11,473		11,473
Other comprehensive income (loss), net of taxes	(26,725)					(26,725)
Balance at Sep. 30, 2014	532,027	$ 19,621	506,090	427,913	$ (354,216)	(30,064)	(37,317)
Balance (in Shares) at Sep. 30, 2014		78,484			25,335
Net income (loss)	34,289			34,289
Dividends	7,654			7,654
Tax effect from exercise/vesting of equity awards, net	345		345
Amortization of deferred compensation	2,786						2,786
Common stock issued	371	$ 17	354
Common stock issued (in Shares)		69
Common stock acquired	(82,343)				$ (82,343)
Common stock acquired (in Shares)					5,402
Equity awards granted, net	(252)	$ 132	(384)
Equity awards granted, net (in Shares)		527
ESOP allocation of common stock	970		970
Stock-based compensation	11,110		11,110
Other comprehensive income (loss), net of taxes	(61,124)					(61,124)
Balance at Sep. 30, 2015	$ 430,525	$ 19,770	$ 518,485	$ 454,548	$ (436,559)	$ (91,188)	$ (34,531)
Balance (in Shares) at Sep. 30, 2015		79,080			30,737