CONDENSED CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY - 6 months ended Mar. 31, 2016 - USD ($) $ 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]
Stock Repurchased During Period, Shares	1,949,338,000
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		79,080,000			30,737,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	14,691			14,691
Dividend	(4,508)			(4,508)
Tax effect from exercise/vesting of equity awards, net	2,291		2,291
Amortization of deferred compensation	1,400						1,400
Common stock acquired	(33,640)				$ (33,640)
Common stock acquired (in Shares)					2,138,000
Equity awards granted, net	0	$ 247	(247)
Stock grants and equity awards, net (in Shares)		990,000
ESOP allocation of common stock	625		625
Stock-based compensation	5,555		5,555
Other comprehensive income, net of tax	8,442					8,442
Balance at Mar. 31, 2016	$ 425,381	$ 20,017	$ 526,709	$ 464,731	$ (470,199)	$ (82,746)	$ (33,131)
Balance (in Shares) at Mar. 31, 2016		80,070,000			32,875,000