Benefit Plans (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Minimum [Member]
Defined Contribution Plan [Line Items]
Defined Contribution Plan, Discretionary Matching Percentage	0.00%
Maximum [Member]
Defined Contribution Plan [Line Items]
Defined Contribution Plan, Discretionary Matching Percentage	3.00%
United States Defined Contribution Plans Of US Entity [Member]
Defined Contribution Plan [Line Items]
Defined Contribution Plan, Cost Recognized	$ 2,122	$ 1,871	$ 1,464
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	50.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	6.00%
Defined Contribution Plan, Employer Discretionary Contribution Amount	1,997	1,847	1,516
401k Portion [Member]
Defined Contribution Plan [Line Items]
Defined Contribution Plan, Requisite Service Period	2 years
Defined Contribution Plan, Minimum Age	21 years
Profit Sharing Portion [Member]
Defined Contribution Plan [Line Items]
Defined Contribution Plan, Requisite Service Period	3 months
Defined Contribution Plan, Minimum Age	21 years
Foreign Defined Contribution Plans [Member]
Defined Contribution Plan [Line Items]
Defined Contribution Plan, Cost Recognized	$ 257	$ 250	$ 269
Foreign Defined Contribution Plans [Member] | Minimum [Member]
Defined Contribution Plan [Line Items]
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	3.00%
Foreign Defined Contribution Plans [Member] | Maximum [Member]
Defined Contribution Plan [Line Items]
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	6.00%