Summary of Significant Accounting Policies Pensions (Details) Companies in Thousands, $ in Thousands	1 Months Ended	3 Months Ended	12 Months Ended
	Apr. 30, 2013	Jun. 30, 2015	Sep. 30, 2015 USD ($) Employees Companies	Sep. 30, 2014 USD ($)	Sep. 30, 2013 USD ($)
Multiemployer Plan Percentage Decrease in Pension Rights	6.30%
Multiemployer Plan, Period Contributions			$ 963	$ 1,087	$ 1,042
Pensioenfonds Metaal en Techniek
Multiemployer Plans Contribution Rate (less than 5%)			5.00%
Multiemployer Plan, Coverage Ratio Of Plan Assets To Obligations		103.00%	95.30%
Multiemployer Plan Premium Percentage	16.60%
Multiemployer Plan Number Of Companies Covered | Companies			33
Multiemployer Plan Number Of Employees | Employees			1,200,000
Multiemployer Plan, Period Contributions			$ 805	929	879
Multiemployer Plans Plan Assets as of September 30, 2014			66,300,000
Multiemployer Plans Present Value Of Accumulated Plan Benefits as of September 30, 2014			69,600,000
Other Plans
Multiemployer Plan, Period Contributions			$ 158	$ 158	$ 163
Minimum | Pensioenfonds Metaal en Techniek
Multiemployer Plan, Coverage Ratio Of Plan Assets To Obligations			105.00%
The Netherlands | Pensioenfonds Metaal en Techniek
Multiemployer Plan Number Of Employees | Employees			120