STATEMENT OF STOCKHOLDERS' EQUITY (USD $) In Thousands	Common Stock Member	Additional Paid In Capital Member	Accumulated Other Comprehensive Income (Loss) Member	Retained Earnings Member	Total
Balance at Sep. 30, 2010	$ 125	$ 129,675	$ 79	$ 116,908	$ 246,787
Shares Balance at Sep. 30, 2010	12,457
Net income				42,580	42,580
Issuance of common stock		412			412
Issuance of common stock (shares)	6
Exercises of common stock options	1	97			98
Exercises of common stock options (shares)	102
Tax benefit of common stock exercises		2,714			2,714
Issuance of stock awards, net of forfeitures		861			861
Issuance of stock awards, net of forfeitures (shares)	53
Foreign currency translation			(663)		(663)
Actuarial gain on unfunded pension liability adjustment, net of tax			21		21
Balance at Sep. 30, 2011	126	133,759	(563)	159,488	292,810
Shares Balance at Sep. 30, 2011	12,618
Net income				53,477	53,477
Issuance of common stock		562			562
Issuance of common stock (shares)	7
Issuance of common stock for purchase of Micro	1	7,158			7,159
Issuance of common stock for purchase of Micro (shares)	94
Exercises of common stock options		154			154
Exercises of common stock options (shares)	15
Tax benefit of common stock exercises		895			895
Issuance of stock awards, net of forfeitures	1	2,139			2,140
Issuance of stock awards, net of forfeitures (shares)	58
Foreign currency translation			1,877		1,877
Actuarial gain on unfunded pension liability adjustment, net of tax			228		228
Balance at Sep. 30, 2012	128	144,667	1,542	212,965	359,302
Shares Balance at Sep. 30, 2012	12,792				12,792
Net income				62,849	62,849
Issuance of common stock		651			651
Issuance of common stock (shares)	5
Exercises of common stock options		108			108
Exercises of common stock options (shares)	6
Tax benefit of common stock exercises		1,323			1,323
Issuance of stock awards, net of forfeitures		1,710			1,710
Issuance of stock awards, net of forfeitures (shares)	45
Foreign currency translation			237		237
Actuarial gain on unfunded pension liability adjustment, net of tax			139		139
Balance at Sep. 30, 2013	$ 128	$ 148,459	$ 1,918	$ 275,814	$ 426,319
Shares Balance at Sep. 30, 2013	12,848				12,848