CONDENSED CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY - 3 months ended Dec. 31, 2016 - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	CAPITAL INEXCESS OFPAR VALUE [Member]	RETAINED EARNINGS [Member]	TREASURY SHARES [Member]	ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) [Member]	DEFERRED COMPENSATION [Member]
Balance at Sep. 30, 2016	$ 410,947	$ 19,992	$ 529,980	$ 475,760	$ (501,866)	$ (81,241)	$ (31,678)
Balance (in Shares) at Sep. 30, 2016		79,966			34,797
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	12,264			12,264
Dividend	(2,499)			(2,499)
Tax effect from exercise/vesting of equity awards, net	(12,969)		(97)		$ 12,872
Tax effect from exercise/vesting of equity awards, net					(555)
Amortization of deferred compensation	893						893
Common stock issued (shares)		2
Common stock issued	7	$ 0	7
Common stock acquired	(2,201)				$ (2,201)
Common stock acquired (in Shares)					129
Equity awards granted, net	0	$ 73	(73)
ESOP purchase of common stock	9,213						9,213
Stock grants and equity awards, net (in Shares)		293
ESOP allocation of common stock	652		652
Stock-based compensation	2,452		2,452
Other comprehensive income, net of tax	(11,312)					(11,312)
Balance at Dec. 31, 2016	$ 389,021	$ 20,065	$ 532,921	$ 485,525	$ (516,939)	$ (92,553)	$ (39,998)
Balance (in Shares) at Dec. 31, 2016		80,261			35,481