CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY AND COMPREHENSIVE INCOME (LOSS) (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]	Comprehensive Income [Member]	Total
Balance at Sep. 30, 2009	$ 18,415	$ 438,438	$ 421,992	$ (213,560)	$ 28,170	$ (5,248)	$ 21,409	$ 688,207
Balance (in Shares) at Sep. 30, 2009	73,663			12,466
Net income (loss)	0	0	9,592	0	0	0	9,592	9,592
Common stock issued for options exercised	13	329	0	0	0	0		342
Common stock issued for options exercised (in Shares)	48			0
Tax effect from exercise/vesting of equity awards, net	0	325	0	0	0	0		325
Amortization of deferred compensation	0	0	0	0	0	744		744
Restricted stock awards granted, net	157	(627)	0	0	0	0		(470)
Restricted stock awards granted, net (in Shares)	630			0
Issuance of convertible debt, net	0	13,694	0	0	0	0		13,694
ESOP allocation of common stock	0	266	0	0	0	0		266
Stock-based compensation	0	5,765	0	0	0	13		5,778
Issuance of common stock pursuant to acquisition	60	2,765	0	0	0	0		2,825
Issuance of common stock pursuant to acquisition (in Shares)	239			0
Translation of foreign financial statements	0	0	0	0	(9,677)	0	(9,677)	(9,677)
Pension OCI, net of tax	0	0	0	0	(911)	0	(911)	(911)
Balance at Sep. 30, 2010	18,645	460,955	431,584	(213,560)	17,582	(4,491)	(996)	710,715
Balance (in Shares) at Sep. 30, 2010	74,580			12,466
Net income (loss)	0	0	(7,431)	0	0	0	(7,431)	(7,431)
Common stock issued for options exercised	85	2,425	0	0	0	0		2,510
Common stock issued for options exercised (in Shares)	339
Tax effect from exercise/vesting of equity awards, net	0	7	0	0	0	0		7
Amortization of deferred compensation	0	0	0	0	0	668		668
Common stock acquired	0	0	0	(18,139)	0	0		(18,139)
Common stock acquired (in Shares)	0			1,968
Restricted stock awards granted, net	316	(588)	0	0	0	0		(272)
Restricted stock awards granted, net (in Shares)	1,265
ESOP purchase of common stock	0	0	0	0	0	(19,973)		(19,973)
ESOP allocation of common stock	0	173	0	0	0	0		173
Stock-based compensation	0	8,956	0	0	0	0		8,956
Translation of foreign financial statements	0	0	0	0	(11,232)	0	(11,232)	(11,232)
Pension OCI, net of tax	0	0	0	0	(14,074)	0	(14,074)	(14,074)
Balance at Sep. 30, 2011	19,046	471,928	424,153	(231,699)	(7,724)	(23,796)	(32,737)	651,908
Balance (in Shares) at Sep. 30, 2011	76,184			14,434
Net income (loss)	0	0	17,011	0	0	0	17,011	17,011
Dividend	0	0	(4,743)	0	0	0		(4,743)
Tax effect from exercise/vesting of equity awards, net	0	834	0	0	0	0		834
Amortization of deferred compensation	0	0	0	0	0	2,031		2,031
Common stock acquired	0	0	0	(10,382)	0	0		(10,382)
Common stock acquired (in Shares)	0			1,187
Restricted stock awards granted, net	81	(1,064)	0	0	0	0		(983)
Restricted stock awards granted, net (in Shares)	325			0
ESOP allocation of common stock	0	(128)	0	0	0	0		(128)
Stock-based compensation	0	10,439	0	0	0	0		10,439
Translation of foreign financial statements	0	0	0	0	(6,754)	0	(6,754)	(6,754)
Pension OCI, net of tax	0	0	0	0	(5,081)	0	(5,081)	(5,081)
Balance at Sep. 30, 2012	$ 19,127	$ 482,009	$ 436,421	$ (242,081)	$ (19,559)	$ (21,765)	$ 5,176	$ 654,152
Balance (in Shares) at Sep. 30, 2012	76,509			15,621