Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Income (loss) before income taxes:
U.S.	$ 36,327	$ (360)	$ 23,555
Foreign	10,849	5,480	8,443
Income before income taxes	47,176	5,120	31,998
Current:
U.S. Federal	11,207	427	2,125
Foreign	1,690	1,012	1,419
State	686	541	85
Total	13,583	1,980	3,629
Deferred:
U.S. Federal	(79)	(983)	5,907
Foreign	690	302	623
State	2,368	70	262
Valuation allowance	128
Total	3,107	(611)	6,792
Provision for income taxes at effective tax rate	$ 16,690	$ 1,369	$ 10,421
Effective income tax rate reconciliation
Statutory federal tax rate (as a percent)	35.00%	35.00%	35.00%
Tax provision for income taxes at the statutory rate	$ 16,512	$ 1,792	$ 11,199
Foreign tax rate differentials	(1,417)	(605)	(913)
Provision for state taxes, net of federal taxes	818	230	473
U.S. tax on distributed and undistributed earnings of foreign subsidiaries	419	173	354
Manufacturer's deduction	(1,213)		(217)
Tax credits	(240)	(91)	(78)
State tax rate change impact on deferred tax asset	1,565	157	(182)
Change in Valuation Allowance	128
Other, net	118	(287)	(215)
Provision for income taxes at effective tax rate	$ 16,690	$ 1,369	$ 10,421
Effective tax rate (as a percent)	35.40%	26.70%	32.60%