Schedule II (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Currency translation adjustments	$ (934)	$ (704)	$ 155
Allowance for Trade Receivables [Member]
Balance at Beginning of Year	7,078	8,872	7,217
Additions: Charged to Costs and Expenses	364	1,283	3,408
Additions: Charged to Other Accounts	487	916	5
Deductions	(4,088)	(3,993)	(1,758)
Balance at End of Year	3,841	7,078	8,872
Valuation Allowance of Deferred Tax Assets [Member]
Balance at Beginning of Year	9,486	11,783	2,752
Additions: Charged to Costs and Expenses	209	271	9,031
Additions: Charged to Other Accounts		0	0
Deductions	(2,891)	(2,568)	0
Balance at End of Year	$ 6,804	$ 9,486	$ 11,783