Income Taxes (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Reconciliation of the income tax expense computed using the statutory Federal income tax rate to the actual income tax expense
Income tax expense at statutory rate	$ 30,627	$ (11,902)	$ 64,525
State income taxes, net of federal income tax benefit	(3,090)	(3,415)	(1,379)
Change in valuation allowance	(1,559)		(1,259)
Effect of international operations, including foreign export benefit and earnings indefinitely reinvested	(12,950)	(38)	(13,075)
Domestic manufacturing deduction	(2,700)	(1,071)	(1,715)
Goodwill impairment	1,925	30,567
Change in tax reserves	(725)	(4,801)
Other	1,559	805	351
Total provision (benefit)	$ 13,087	$ 10,145	$ 47,448
Reconciliation of the income tax expense computed using the statutory Federal income tax rate to the effective income tax rate
Income tax expense at statutory rate (as a percent)	35.00%	35.00%	35.00%
State income taxes, net of federal income tax benefit (as a percent)	(3.50%)	10.00%	(0.70%)
Change in valuation allowance (as a percent)	(1.70%)	0.00%	(0.70%)
Effect of international operations, including foreign export benefit and earnings indefinitely reinvested (as a percent)	(14.80%)	0.10%	(7.10%)
Domestic manufacturing deduction (as a percent)	(3.10%)	3.10%	(0.90%)
Goodwill impairment (as a percent)	2.20%	(89.90%)	0.00%
Change in tax reserves (as a percent)	(0.80%)	14.10%	0.00%
Other (as a percent)	1.70%	(2.40%)	0.20%
Effective income tax rate (as a percent)	15.00%	(29.80%)	25.70%
Foreign earnings reinvested indefinitely during the period	$ 130,000